714 lines
20 KiB
JavaScript
714 lines
20 KiB
JavaScript
'use strict';
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/*@
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Ox.avg <f> Returns the average of an array's values, or an object's properties
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(collection) -> <n> Average value
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collection <[n]|o> Array or object with numerical values
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> Ox.avg([-1, 0, 1])
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0
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> Ox.avg({a: 1, b: 2, c: 3})
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2
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> Ox.avg('avg is 0.1')
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0.1
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@*/
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Ox.avg = function(obj) {
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return Ox.sum(obj) / Ox.len(obj);
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};
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/*@
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Ox.clone <f> Returns a (shallow or deep) copy of an object or array
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> (function() { var a = ['v'], b = Ox.clone(a); a[0] = null; return b[0]; }())
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'v'
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> (function() { var a = {k: 'v'}, b = Ox.clone(a); a.k = null; return b.k; }())
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'v'
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> Ox.clone(0)
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0
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@*/
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Ox.clone = Ox.copy = function(col, deep) {
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// fixme: copy or clone?
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var ret = Ox.isArray(col) ? [] : {};
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if (deep) {
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Ox.forEach(col, function(val, key) {
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ret[key] = ['array', 'object'].indexOf(Ox.typeOf(val)) > -1
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? Ox.clone(val, true) : val;
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});
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} else {
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ret = Ox.isArray(col) ? col.slice()
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: Ox.isObject(col) ? Ox.extend({}, col)
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: col;
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}
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return ret;
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};
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/*@
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Ox.contains <f> Tests if a collection contains a value
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> Ox.contains(['foo', 'bar'], 'foo')
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true
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> Ox.contains({foo: 'bar'}, 'bar')
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true
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> Ox.contains({foo: 'bar'}, 'foo')
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false
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> Ox.contains("foobar", "bar")
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true
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@*/
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// FIXME: a shorter name would be nice (but IE8 doesn't like 'in')
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Ox.contains = function(col, val) {
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return (Ox.isObject(col) ? Ox.values(col) : col).indexOf(val) > -1;
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};
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/*@
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Ox.count <f> Counts the occurences of values in a collection
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> Ox.count(['f', 'o', 'o'])
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{f: 1, o: 2}
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> Ox.count({a: 'f', b: 'o', c: 'o'})
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{f: 1, o: 2}
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> Ox.count('foo')
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{f: 1, o: 2}
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@*/
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Ox.count = function(arr) {
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var obj = {};
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Ox.forEach(arr, function(v) {
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obj[v] = (obj[v] || 0) + 1;
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});
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return obj;
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};
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/*@
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Ox.every <f> Tests if every element of a collection satisfies a given condition
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Unlike <code>[].every()</code>, <code>Ox.every()</code> works for arrays,
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objects and strings.
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> Ox.every([0, 1, 2], function(v, i) { return i == v; })
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true
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> Ox.every({a: 1, b: 2, c: 3}, function(v) { return v == 1; })
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false
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> Ox.every("foo", function(v) { return v == 'f'; })
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false
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> Ox.every([true, true, true])
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true
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@*/
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Ox.every = function(col, fn) {
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return Ox.filter(Ox.values(col), fn || Ox.identity).length == Ox.len(col);
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};
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/*@
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Ox.filter <f> Filters a collection by a given condition
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Unlike <code>[].filter()</code>, <code>Ox.filter()</code> works for arrays,
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objects and strings.
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> Ox.filter([2, 1, 0], function(v, i) { return v == i; })
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[1]
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> Ox.filter({a: 'c', b: 'b', c: 'a'}, function(v, k) { return v == k; })
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{b: 'b'}
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> Ox.filter(' foo bar ', function(v) { return v != ' '; })
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'foobar'
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@*/
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Ox.filter = function(col, fn, that) {
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var ret, type = Ox.typeOf(col);
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fn = fn || Ox.identity;
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if (type == 'object') {
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ret = {};
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Ox.forEach(col, function(val, key) {
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if (fn.call(that, val, key, col)) {
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ret[val] = key;
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}
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});
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} else {
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ret = Ox.toArray(col).filter(fn, that);
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if (type == 'string') {
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ret = ret.join('');
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}
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}
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return ret;
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};
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/*@
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Ox.find <f> Returns array elements that match a string
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Returns an array of two arrays, the first containing leading matches
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(exact match first), the second containing non-leading matches
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> Ox.find(['foo', 'bar', 'foobar', 'barfoo'], 'foo')
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[['foo', 'foobar'], ['barfoo']]
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@*/
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// fixme: wouldn't it make more sense to return just one array?
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Ox.find = function(arr, str) {
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var ret = [[], []];
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str = str.toLowerCase();
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arr.map(function(v) {
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return v.toLowerCase(); // fixme: don't loop twice!!
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}).forEach(function(v, i) {
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var index = v.indexOf(str);
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index > -1 && ret[index == 0 ? 0 : 1][v == str ? 'unshift' : 'push'](arr[i]);
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});
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return ret;
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};
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/*@
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// FIXME: documentation is outdated!
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Ox.forEach <f> forEach loop
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<code>Ox.forEach()</code> loops over arrays, objects and strings.
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Returning <code>false</code> from the iterator function acts like a
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<code>break</code> statement (unlike <code>[].forEach()</code>, like
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<code>$.each()</code>). The arguments of the iterator function are
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<code>(value, key, index)</code> (more like <code>[].forEach()</code>
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than like <code>$.each()</code>).
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(collection, callback) <a|o|s> The collection
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(collection, callback, includePrototype) <a|o|s> The collection
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collection <a|o|s> An array, object or string
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callback <f> Iterator function
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value <*> Value
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key <n|s> Key
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includePrototype <b|false> If true, include prototype properties
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<script>
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Ox.test.string = "";
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Ox.forEach(["f", "o", "o"], function(v, i) { Ox.test.string += i; });
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Ox.forEach({a: "f", b: "o", c: "o"}, function(v, k) { Ox.test.string += k; });
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Ox.forEach("foo", function(v) { Ox.test.string += v; });
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</script>
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> Ox.test.string
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"012abcfoo"
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@*/
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Ox.forEach = function(col, fn, that) {
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var i, key, type = Ox.typeOf(col);
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if (type != 'array' && type != 'object') {
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col = Ox.toArray(col);
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}
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try {
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if (type == 'object') {
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for (key in col) {
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// Ox.hasOwn(obj, key) && fn.call(that, col[key], key, col);
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if (Ox.hasOwn(col, key) && fn.call(that, col[key], key, col) === false) {
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throw new Error('Returning false in Ox.forEach is deprecated.');
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}
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}
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} else {
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for (i = 0; i < col.length; i++) {
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// i in col && fn.call(that, col[i], i, col);
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if (i in col && fn.call(that, col[i], i, col) === false) {
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throw new Error('Returning false in Ox.forEach is deprecated.');
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}
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}
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}
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} catch(e) {
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if (e !== Ox.BreakError) {
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throw e;
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}
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}
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return type == 'object' ? key : i;
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};
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/*@
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Ox.getIndexById <f> Returns the first array index of an object with a given id
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> Ox.getIndexById([{id: 'foo', str: 'Foo'}, {id: 'bar', str: 'Bar'}], 'bar')
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1
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> Ox.getIndexById([{id: 'foo', str: 'Foo'}, {id: 'bar', str: 'Bar'}], 'baz')
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-1
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@*/
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Ox.getIndexById = function(arr, id) {
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return Ox.indexOf(arr, function(obj) {
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return obj.id === id;
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});
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};
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/*@
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Ox.getObjectById <f> Returns the first object in an array with a given id
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> Ox.getObjectById([{id: 'foo', str: 'Foo'}, {id: 'bar', str: 'Bar'}], 'bar')
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{id: "bar", str: "Bar"}
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> Ox.getObjectById([{id: 'foo', str: 'Foo'}, {id: 'bar', str: 'Bar'}], 'baz')
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null
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@*/
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Ox.getObjectById = function(arr, id) {
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var index = Ox.getIndexById(arr, id);
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return index > -1 ? arr[index] : null;
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};
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/*@
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Ox.getset <f> Generic getter and setter function
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See examples for details.
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# Usage --------------------------------------------------------------------
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Ox.getset(options, args=[]) -> <o> all options
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Ox.getset(options, args=[key]) -> <*> options[key]
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Ox.getset(options, args=[key, value], callback, context) -> <f|o> context
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sets options[key] to value and calls fn(key, value)
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if the key/value pair was added or modified
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Ox.getset(options, args=[{key: value}], callback, context) -> <f|o> context
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sets multiple options and calls fn(key, value)
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for every key/value pair that was added or modified
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# Arguments ----------------------------------------------------------------
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options <obj> Options object (key/value pairs)
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args <arr> The arguments "array" of the caller function
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callback <fun> Callback function
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The callback is called for every key/value pair that was added or
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modified.
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key <s> Key
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value <*> Value
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context <obj> The parent object of the caller function (for chaining)
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# Examples -----------------------------------------------------------------
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<script>
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Ox.test.object = new function() {
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var options = {},
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setOption = function(key, value) {
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// handle added or modified options
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},
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that = this;
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that.options = function() {
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return Ox.getset(options, arguments, setOption, that);
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};
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return that;
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};
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</script>
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> Ox.test.object.options("key", "val").options("key")
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"val"
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> Ox.test.object.options({foo: "foo", bar: "bar"}).options()
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{"key": "val", "foo": "foo", "bar": "bar"}
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@*/
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Ox.getset = function(obj, args, callback, context) {
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var obj_ = Ox.clone(obj), ret;
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if (args.length == 0) {
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// []
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ret = obj_;
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} else if (args.length == 1 && !Ox.isObject(args[0])) {
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// [key]
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ret = Ox.clone(obj[args[0]]);
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} else {
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// [key, val] or [{key: val, ...}]
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args = Ox.makeObject(args);
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obj = Ox.extend(obj, args);
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Ox.forEach(args, function(val, key) {
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if (!obj_ || !Ox.isEqual(obj_[key], val)) {
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callback && callback(key, val);
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}
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});
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ret = context;
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}
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return ret;
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}
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/*@
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Ox.indexOf <f> <code>indexOf</code> with a test function
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> Ox.indexOf([1, 2, 3], function(val) { return val % 2 == 0; })
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1
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> Ox.indexOf('fooBar', function(val) { return val == val.toUpperCase(); })
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3
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@*/
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Ox.indexOf = function(col, fn) {
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var index = Ox.forEach(col, function(val) {
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fn(val) && Ox.Break();
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});
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return index == col.length ? -1 : index;
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};
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/*@
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Ox.indicesOf <f> return indices of array elements that pass a test
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> Ox.indicesOf([1, 2, 3, 4], function(val) { return val % 2 == 0; })
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[1, 3]
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@*/
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Ox.indicesOf = function(col, fn) {
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return Ox.map(col, function(val, i) {
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return fn(val) ? i : null;
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}).filter(function(index) {
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return index !== null;
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});
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};
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/*@
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Ox.isEmpty <f> Tests if a value is an empty array, object or string
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(value) -> <b> True if the value is an empty array, object or string
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value <*> Any value
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> Ox.isEmpty([])
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true
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> Ox.isEmpty({})
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true
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> Ox.isEmpty('')
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true
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> Ox.isEmpty(function() {})
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false
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> Ox.isEmpty(false)
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false
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> Ox.isEmpty(null)
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false
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> Ox.isEmpty(0)
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false
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> Ox.isEmpty()
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false
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@*/
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Ox.isEmpty = function(val) {
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return Ox.len(val) === 0;
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};
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/*@
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Ox.last <f> Gets or sets the last element of an array
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Unlike <code>arrayWithALongName[arrayWithALongName.length - 1]</code>,
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<code>Ox.last(arrayWithALongName)</code> is short.
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<script>
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Ox.test.array = [1, 2, 3];
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</script>
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> Ox.last(Ox.test.array)
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3
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> Ox.last(Ox.test.array, 4)
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[1, 2, 4]
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> Ox.test.array
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[1, 2, 4]
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> Ox.last('123')
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'3'
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@*/
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Ox.last = function(arr, val) {
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var ret;
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if (arguments.length == 1) {
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ret = arr[arr.length - 1];
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} else {
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arr[arr.length - 1] = val;
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ret = arr;
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}
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return ret;
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};
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/*@
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Ox.len <f> Returns the length of an array, node list, object or string
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Not to be confused with <code>Ox.length</code>, which is the
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<code>length</code> property of the <code>Ox</code> function
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(<code>1</code>).
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> Ox.len((function() { return arguments; }(1, 2, 3)))
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3
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> Ox.len([1, 2, 3])
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3
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> Ox.len([,])
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1
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> Ox.typeOf(Ox.len(document.getElementsByTagName('a')))
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'number'
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> Ox.len({a: 1, b: 2, c: 3})
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3
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> Ox.len('abc')
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3
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> Ox.len(function(a, b, c) {})
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undefined
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@*/
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// FIXME: Ox.size() ?
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Ox.len = function(col) {
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var len, type = Ox.typeOf(col);
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if (
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type == 'arguments' || type == 'array'
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|| type == 'nodelist' || type == 'string'
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) {
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len = col.length;
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} else if (type == 'object') {
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len = Object.keys(col).length;
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}
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return len;
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};
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/*@
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Ox.makeArray <f> Wraps any non-array in an array.
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> Ox.makeArray('foo')
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['foo']
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> Ox.makeArray(['foo'])
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['foo']
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@*/
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Ox.makeArray = function(obj) {
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var arr;
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if (Ox.isArray(obj)) {
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arr = obj;
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} else if (Ox.isArguments(obj)) {
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arr = Ox.toArray(obj);
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} else {
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arr = [obj];
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}
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return arr;
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};
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/*@
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Ox.makeObject <f> Takes an array and returns an object
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<code>Ox.makeObject</code> is a helper for functions with two alternative
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signatures like <code>('key', 'val')</code> and <code>({key: 'val'})</code>.
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> (function() { return Ox.makeObject(arguments); }({foo: 1, bar: 2}))
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{foo: 1, bar: 2}
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> (function() { return Ox.makeObject(arguments); }('foo', 1))
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{foo: 1}
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> (function() { return Ox.makeObject(arguments); }('foo'))
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{foo: void 0}
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> (function() { return Ox.makeObject(arguments); }())
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{}
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@*/
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Ox.makeObject = function(arr) {
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var ret = {}, type = Ox.typeOf(arr[0]);
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if (type == 'object') {
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// ({foo: 'bar'})
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ret = arr[0];
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} else if (type == 'string') {
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// ('foo', 'bar')
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ret[arr[0]] = arr[1];
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}
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return ret;
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};
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/*@
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Ox.map <f> Transforms the values of an array, object or string
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Unlike <code>[].map()</code>, <code>Ox.map()</code> works for arrays,
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objects and strings.
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> Ox.map([0, 0, 0], function(v, i) { return v == i; })
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[true, false, false]
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> Ox.map({a: 'a', b: 'a', c: 'a'}, function(v, k) { return v == k; })
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{a: true, b: false, c: false}
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> Ox.map('foo', function(v) { return v.toUpperCase(); })
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'FOO'
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> Ox.map([0, 1, 2, 4], function(v, i) { return v ? i == v : null; })
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[true, true, false]
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> Ox.map([,], function(v, i) { return i; })
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[,]
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@*/
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Ox.map = function(col, fn, that) {
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var type = Ox.typeOf(col), ret;
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if (type == 'object') {
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ret = {};
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Ox.forEach(col, function(val, key) {
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ret[key] = fn.call(that, val, key, col);
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});
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} else {
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ret = Ox.toArray(col).map(fn);
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if (type == 'string') {
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ret = ret.join('');
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}
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}
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return ret;
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};
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/*@
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Ox.max <f> Returns the maximum value of a collection
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> Ox.max([1, 2, 3])
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3
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> Ox.max({a: 1, b: 2, c: 3})
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3
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> Ox.max('123')
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3
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@*/
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Ox.max = function(col) {
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var ret, values = Ox.values(col);
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if (values.length < Ox.STACK_LENGTH) {
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ret = Math.max.apply(null, values)
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} else {
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ret = values.reduce(function(pre, val) {
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return Math.max(pre, val);
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}, -Infinity);
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}
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return ret;
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};
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/*@
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Ox.min <f> Returns the minimum value of a collection
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> Ox.min([1, 2, 3])
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1
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> Ox.min({a: 1, b: 2, c: 3})
|
|
1
|
|
> Ox.min('123')
|
|
1
|
|
@*/
|
|
Ox.min = function(col) {
|
|
var ret, values = Ox.values(col);
|
|
if (values.length < Ox.STACK_LENGTH) {
|
|
ret = Math.min.apply(null, values)
|
|
} else {
|
|
ret = values.reduce(function(pre, val) {
|
|
return Math.min(pre, val);
|
|
}, Infinity);
|
|
}
|
|
return ret;
|
|
};
|
|
|
|
/*@
|
|
Ox.reverse <f> Reverses an array or string
|
|
> Ox.reverse([1, 2, 3])
|
|
[3, 2, 1]
|
|
> Ox.reverse('foobar')
|
|
'raboof'
|
|
@*/
|
|
Ox.reverse = function(col) {
|
|
return Ox.isArray(col)
|
|
? Ox.clone(col).reverse()
|
|
: col.toString().split('').reverse().join('');
|
|
};
|
|
|
|
/*@
|
|
Ox.setPropertyOnce <f> Sets a property once
|
|
Given a array of objects, each of which has a property with a boolean
|
|
value, this sets exactly one of these to true, and returns the index
|
|
of the object whose property is true.
|
|
> Ox.setPropertyOnce([{selected: false}, {selected: false}], 'selected')
|
|
0
|
|
> Ox.setPropertyOnce([{selected: false}, {selected: true}], 'selected')
|
|
1
|
|
> Ox.setPropertyOnce([{selected: true}, {selected: true}], 'selected')
|
|
0
|
|
@*/
|
|
// fixme: strange name, and shouldn't it return the full array?
|
|
Ox.setPropertyOnce = function(arr, str) {
|
|
var pos = -1;
|
|
Ox.forEach(arr, function(v, i) {
|
|
if (pos == -1 && arr[i][str]) {
|
|
pos = i;
|
|
} else if (pos > -1 && arr[i][str]) {
|
|
delete arr[i][str];
|
|
}
|
|
});
|
|
if (pos == -1) {
|
|
arr[0][str] = true;
|
|
pos = 0;
|
|
}
|
|
return pos;
|
|
};
|
|
|
|
/*@
|
|
Ox.shuffle <f> Randomizes the order of values within a collection
|
|
> Ox.shuffle([1, 2, 3]).length
|
|
3
|
|
> Ox.len(Ox.shuffle({a: 1, b: 2, c: 3}))
|
|
3
|
|
> Ox.shuffle('123').split('').sort().join('')
|
|
'123'
|
|
@*/
|
|
Ox.shuffle = function(col) {
|
|
var keys, ret, type = Ox.typeOf(col), values;
|
|
if (type == 'object') {
|
|
keys = Object.keys(col);
|
|
values = Ox.shuffle(Ox.values(col));
|
|
ret = {};
|
|
keys.forEach(function(key, i) {
|
|
ret[key] = values[i]
|
|
});
|
|
} else {
|
|
ret = [];
|
|
Ox.toArray(col).forEach(function(v, i) {
|
|
var random = Math.floor(Math.random() * (i + 1));
|
|
ret[i] = ret[random];
|
|
ret[random] = v;
|
|
});
|
|
if (type == 'string') {
|
|
ret = ret.join('');
|
|
}
|
|
}
|
|
return ret;
|
|
};
|
|
|
|
/*@
|
|
Ox.slice <f> Alias for <code>Array.prototype.slice.call</code>
|
|
> (function() { return Ox.slice(arguments, 1, -1); }(1, 2, 3))
|
|
[2]
|
|
@*/
|
|
Ox.slice = function(val, start, stop) {
|
|
return Array.prototype.slice.call(val, start, stop);
|
|
};
|
|
|
|
/*@
|
|
Ox.some <f> Tests if one or more elements of a collection meet a given condition
|
|
Unlike <code>[].some()</code>, <code>Ox.some()</code> works for arrays,
|
|
objects and strings.
|
|
> Ox.some([2, 1, 0], function(i, v) { return i == v; })
|
|
true
|
|
> Ox.some({a: 1, b: 2, c: 3}, function(v) { return v == 1; })
|
|
true
|
|
> Ox.some("foo", function(v) { return v == 'f'; })
|
|
true
|
|
> Ox.some([false, null, 0, '', void 0])
|
|
false
|
|
@*/
|
|
Ox.some = function(obj, fn) {
|
|
return Ox.filter(Ox.values(obj), fn || function(v) {
|
|
return v;
|
|
}).length > 0;
|
|
};
|
|
|
|
/*@
|
|
Ox.sum <f> Returns the sum of the values of a collection
|
|
> Ox.sum(1, 2, 3)
|
|
6
|
|
> Ox.sum([1, 2, 3])
|
|
6
|
|
> Ox.sum({a: 1, b: 2, c: 3})
|
|
6
|
|
> Ox.sum('123')
|
|
6
|
|
> Ox.sum('123foo')
|
|
6
|
|
> Ox.sum('08', -2, 'foo')
|
|
6
|
|
@*/
|
|
Ox.sum = function(col) {
|
|
var sum = 0;
|
|
col = arguments.length > 1 ? Ox.toArray(arguments) : col;
|
|
Ox.forEach(col, function(val) {
|
|
val = +val;
|
|
sum += isFinite(val) ? val : 0;
|
|
});
|
|
return sum;
|
|
};
|
|
|
|
/*@
|
|
Ox.toArray <f> Takes an array-like object and returns a true array
|
|
(value) -> <a> True array
|
|
value <*> Array-like object
|
|
> (function() { return Ox.toArray(arguments); }("foo", "bar"))
|
|
["foo", "bar"]
|
|
> Ox.toArray("foo")
|
|
["f", "o", "o"]
|
|
> Ox.toArray({0: "f", 1: "o", 2: "o", length: 3})
|
|
["f", "o", "o"]
|
|
@*/
|
|
// rewrite this so that it uses a try/catch test
|
|
Ox.toArray = /MSIE/.test(navigator.userAgent)
|
|
? function(col) {
|
|
var i, len, ret = [];
|
|
try {
|
|
ret = Array.prototype.slice.call(col);
|
|
} catch(e) {
|
|
// handle MSIE NodeLists
|
|
len = col.length;
|
|
for (i = 0; i < len; i++) {
|
|
ret[i] = col[i];
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
: function(col) {
|
|
return Array.prototype.slice.call(col);
|
|
};
|
|
|
|
/*@
|
|
Ox.values <f> Returns the values of a collection
|
|
> Ox.values([1, 2, 3])
|
|
[1, 2, 3]
|
|
> Ox.values({a: 1, b: 2, c: 3})
|
|
[1, 2, 3]
|
|
> Ox.values('abc')
|
|
['a', 'b', 'c']
|
|
> Ox.values([1,,3])
|
|
[1, 3]
|
|
@*/
|
|
Ox.values = function(col) {
|
|
var ret, type = Ox.typeOf(col);
|
|
if (type == 'array') {
|
|
ret = col;
|
|
} else if (type == 'object') {
|
|
ret = [];
|
|
Ox.forEach(col, function(val) {
|
|
ret.push(val);
|
|
});
|
|
} else if (type == 'string') {
|
|
ret = col.split('');
|
|
}
|
|
return ret;
|
|
};
|
|
|
|
/*@
|
|
Ox.walk <f> Recursively walk a tree of key/value pairs
|
|
<script>
|
|
Ox.test.number = 0;
|
|
Ox.walk({a: 1, b: {c: 2, d: 3}}, function (v) {
|
|
Ox.test.number += Ox.isNumber(v) ? v : 0;
|
|
});
|
|
</script>
|
|
> Ox.test.number
|
|
6
|
|
@*/
|
|
Ox.walk = function(obj, fn) {
|
|
Ox.forEach(obj, function(val, key) {
|
|
fn(val, key, obj);
|
|
Ox.walk(obj[key], fn);
|
|
});
|
|
};
|