573 lines
16 KiB
JavaScript
573 lines
16 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(collection) {
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return Ox.sum(collection) / Ox.len(collection);
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};
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/*@
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Ox.clone <f> Returns a (shallow or deep) copy of an array or object
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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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> (function() { var a = [[0, 1]], b = Ox.clone(a); a[0][0] = null; return b[0]; }())
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[null, 1]
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> (function() { var a = [[0, 1]], b = Ox.clone(a, true); a[0][0] = null; return b[0]; }())
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[0, 1]
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@*/
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Ox.clone = function(collection, deep) {
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var ret, type = Ox.typeOf(collection);
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if (deep) {
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ret = type == 'array' ? [] : {};
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Ox.forEach(collection, function(value, key) {
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type = Ox.typeOf(value);
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ret[key] = type == 'array' || type == 'object'
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? Ox.clone(value, true) : value;
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});
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} else {
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ret = type == 'array' ? collection.slice()
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: type == 'object' ? Ox.extend({}, collection)
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: collection;
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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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(collection, value) -> <b> If true, the collection contains the value
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collection <a|o|s> Collection
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value <*> Any 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(collection, value) {
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return (
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Ox.isObject(collection) ? Ox.values(collection) : collection
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).indexOf(value) > -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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(collection) -> <o> Number of occurrences per value
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(collection, value) -> <n> Number of occurrences of the given value
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collection <a|o|s> Collection
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value <*> Any value
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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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> Ox.count('foo', 'f')
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1
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> Ox.count('foo', 'x')
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0
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@*/
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Ox.count = function(collection, value) {
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var count = {};
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Ox.forEach(collection, function(value) {
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count[value] = (count[value] || 0) + 1;
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});
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return value ? count[value] || 0 : count;
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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 `Array.prototype.every`, `Ox.every` works for arrays, objects and
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strings.
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(collection, iterator) -> <b> True if every element passes the test
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collection <a|o|s> Collection
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iterator <f> Iterator
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value <*> Value
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key <n|s> Index or key
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collection <a|o|s> The collection
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> Ox.every([0, 1, 2], function(v, i) { return v == i; })
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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(collection, iterator) {
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return Ox.filter(
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Ox.values(collection), iterator || Ox.identity
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).length == Ox.len(collection);
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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 `Array.prototype.filter`, `Ox.filter` works for arrays, objects and
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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(collection, iterator, that) {
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var ret, type = Ox.typeOf(collection);
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iterator = iterator || Ox.identity;
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if (type == 'object' || type == 'storage') {
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ret = {};
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Ox.forEach(collection, function(value, key) {
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if (iterator.call(that, value, key, collection)) {
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ret[key] = value;
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}
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});
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} else {
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ret = Ox.toArray(collection).filter(iterator, 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.forEach <f> forEach loop
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`Ox.forEach` loops over arrays, objects and strings. Calling `Ox.Break`
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inside the iterator or returning `false` from the iterator acts like a
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`break` statement. Unlike `Array.prototype.forEach`, which leaks its counter
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variable to the outer scope, `Ox.forEach` returns it.
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(collection, iterator[, that]) -> <n> Next index
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collection <a|o|s> Collection
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iterator <f> Iterator
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value <*> Value
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key <n|s> Index or key
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collection <a|o|s> The collection
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that <o> The iterator's `this` binding
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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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> Ox.forEach({a: 'f', b: 'o', c: 'o'}, function(v, k) { return v != 'o' });
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1
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@*/
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Ox.forEach = function(collection, iterator, that) {
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var i = 0, key, type = Ox.typeOf(collection);
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try {
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if (type == 'object' || type == 'storage') {
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for (key in collection) {
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if (Ox.hasOwn(collection, key)) {
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// iterator.call(that, collection[key], key, collection);
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if (iterator.call(that, collection[key], key, collection) === false) {
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// console.warn('Returning false in Ox.forEach is deprecated.');
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break;
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}
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}
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i++;
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}
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} else {
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collection = Ox.toArray(collection);
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for (i = 0; i < collection.length; i++) {
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if (i in collection) {
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// iterator.call(that, collection[i], i, collection);
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if (iterator.call(that, collection[i], i, collection) === false) {
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// console.warn('Returning false in Ox.forEach is deprecated.');
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break;
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}
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}
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}
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}
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} catch (error) {
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if (error !== Ox.BreakError) {
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throw error;
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}
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}
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return i;
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};
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/*@
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Ox.indexOf <f> Returns the first index of a collection element that passes a test
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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({a: 1, b: 2, c: 3}, function(val) { return val % 2 == 0; })
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'b'
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> Ox.indexOf('FooBar', function(val) { return val == val.toUpperCase(); })
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0
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> Ox.indexOf([1, 2, 3], function(val) { return val == 0; })
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-1
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@*/
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Ox.indexOf = function(collection, test) {
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var index = Ox.forEach(collection, function(value) {
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test(value) && Ox.Break();
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});
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return Ox.isObject(collection) ? Object.keys(collection)[index] || null
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: index == collection.length ? -1 : index;
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};
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/*@
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Ox.indicesOf <f> Returns all indices of collection elements that pass a test
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> Ox.indicesOf([1, 2, 3], function(val) { return val % 2 == 1; })
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[0, 2]
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> Ox.indicesOf({a: 1, b: 2, c: 3}, function(val) { return val % 2 == 1; })
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['a', 'c']
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> Ox.indicesOf('FooBar', function(val) { return val == val.toUpperCase(); })
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[0, 3]
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> Ox.indicesOf([1, 2, 3], function(val) { return val == 0; })
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[]
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@*/
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Ox.indicesOf = function(collection, test) {
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var ret = [];
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Ox.forEach(collection, function(value, index) {
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test(value) && ret.push(index);
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});
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return ret;
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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(value) {
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return Ox.len(value) === 0;
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};
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/*@
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Ox.len <f> Returns the length of an array, nodelist, object, storage or string
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Not to be confused with `Ox.length`, which is the `length` property of the
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`Ox` function (`1`).
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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.typeOf(Ox.len(localStorage))
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'number'
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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(collection) {
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var ret, type = Ox.typeOf(collection);
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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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ret = collection.length;
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} else if (type == 'object' || type == 'storage') {
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ret = Object.keys(collection).length;
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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 `Array.prototype.map`, `Ox.map` works for arrays, objects and
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strings.
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> Ox.map([2, 1, 0], function(v, i) { return v == i; })
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[false, true, false]
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> Ox.map({a: 'b', b: 'b', c: 'b'}, function(v, k) { return v == k; })
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{a: false, b: true, 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([,], function(v, i) { return i; })
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[,]
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@*/
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Ox.map = function(collection, iterator, that) {
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var ret, type = Ox.typeOf(collection);
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if (type == 'object' || type == 'storage') {
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ret = {};
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Ox.forEach(collection, function(value, key) {
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ret[key] = iterator.call(that, value, key, collection);
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});
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} else {
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ret = Ox.toArray(collection).map(iterator);
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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(collection) {
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var ret, values = Ox.values(collection);
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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(previousValue, currentValue) {
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return Math.max(previousValue, currentValue);
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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})
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1
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> Ox.min('123')
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1
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@*/
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Ox.min = function(collection) {
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var ret, values = Ox.values(collection);
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if (values.length < Ox.STACK_LENGTH) {
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ret = Math.min.apply(null, values)
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} else {
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ret = values.reduce(function(previousValue, currentValue) {
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return Math.min(previousValue, currentValue);
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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.reverse <f> Reverses an array or string
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> Ox.reverse([1, 2, 3])
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[3, 2, 1]
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> Ox.reverse('foobar')
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'raboof'
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@*/
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Ox.reverse = function(collection) {
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return Ox.isArray(collection)
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? Ox.clone(collection).reverse()
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: collection.toString().split('').reverse().join('');
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};
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/*@
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Ox.shuffle <f> Randomizes the order of values within a collection
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> Ox.shuffle([1, 2, 3]).length
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3
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> Ox.len(Ox.shuffle({a: 1, b: 2, c: 3}))
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3
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> Ox.shuffle('123').split('').sort().join('')
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'123'
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@*/
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Ox.shuffle = function(collection) {
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var keys, ret, type = Ox.typeOf(collection), values;
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if (type == 'object' || type == 'storage') {
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keys = Object.keys(collection);
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values = Ox.shuffle(Ox.values(collection));
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ret = {};
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keys.forEach(function(key, index) {
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ret[key] = values[index];
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});
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} else {
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ret = [];
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Ox.toArray(collection).forEach(function(value, index) {
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var random = Math.floor(Math.random() * (index + 1));
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ret[index] = ret[random];
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ret[random] = value;
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});
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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.slice <f> Alias for `Array.prototype.slice.call`
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> (function() { return Ox.slice(arguments, 1, -1); }(1, 2, 3))
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[2]
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> (function() { return Ox.slice(arguments, 1); }(1, 2, 3))
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[2, 3]
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@*/
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Ox.slice = function(value, start, stop) {
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return Array.prototype.slice.call(value, start, stop);
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};
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// IE8 returns an empty array if undefined is passed as stop
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// and an array of null values if a string is passed as value.
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// Firefox 3.6 returns an array of undefined values
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// if a string is passed as value.
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if (
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Ox.slice([0]).length == 0
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|| Ox.slice('0')[0] === null
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|| Ox.slice('0')[0] === void 0
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) {
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Ox.slice = function(value, start, stop) {
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if (Ox.typeOf(value) == 'string') {
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value = value.split('');
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}
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return stop === void 0
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? Array.prototype.slice.call(value, start)
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: Array.prototype.slice.call(value, start, stop);
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};
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}
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/*@
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Ox.some <f> Tests if one or more elements of a collection meet a given condition
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Unlike `Array.prototype.some`, `Ox.some` works for arrays, objects and
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strings.
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> Ox.some([2, 1, 0], function(i, v) { return i == v; })
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true
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> Ox.some({a: 1, b: 2, c: 3}, function(v) { return v == 1; })
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true
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> Ox.some("foo", function(v) { return v == 'f'; })
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true
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> Ox.some([false, null, 0, '', void 0])
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false
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@*/
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Ox.some = function(collection, iterator) {
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return Ox.filter(Ox.values(collection), iterator || Ox.identity).length > 0;
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};
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/*@
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Ox.sum <f> Returns the sum of the values of a collection
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> Ox.sum(1, 2, 3)
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6
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> Ox.sum([1, 2, 3])
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6
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> Ox.sum({a: 1, b: 2, c: 3})
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6
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> Ox.sum('123')
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6
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> Ox.sum('123foo')
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6
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> Ox.sum('08', -2, 'foo')
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6
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@*/
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Ox.sum = function(collection) {
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var ret = 0;
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collection = arguments.length > 1 ? Ox.toArray(arguments) : collection;
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Ox.forEach(collection, function(value) {
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value = +value;
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ret += isFinite(value) ? value : 0;
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});
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return ret;
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};
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/* FIXME: do we need this kind of zip functionality?
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Ox.arrayToObject = function(array, key) {
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var ret = {};
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array.forEach(function(v) {
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ret[v[key]] = v;
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});
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return ret;
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};
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Ox.objectToArray = function(object, key) {
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var ret = [];
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Ox.forEach(object, function(v, k) {
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ret.push(Ox.extend(v, key, k));
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});
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return ret
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};
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|
*/
|
|
|
|
/*@
|
|
Ox.values <f> Returns the values of a collection
|
|
(collection) -> <a> Array of values
|
|
collection <a|o|s> Collection
|
|
> Ox.values([1, 2, 3])
|
|
[1, 2, 3]
|
|
> Ox.values({a: 1, b: 2, c: 3})
|
|
[1, 2, 3]
|
|
> Ox.typeOf(Ox.values(localStorage))
|
|
'array'
|
|
> Ox.values('abc')
|
|
['a', 'b', 'c']
|
|
> Ox.values([1,,3])
|
|
[1,,3]
|
|
@*/
|
|
Ox.values = function(collection) {
|
|
var ret, type = Ox.typeOf(collection);
|
|
if (type == 'array') {
|
|
ret = Ox.clone(collection);
|
|
} else if (type == 'object' || type == 'storage') {
|
|
ret = [];
|
|
Ox.forEach(collection, function(value) {
|
|
ret.push(value);
|
|
});
|
|
} else if (type == 'string') {
|
|
ret = collection.split('');
|
|
}
|
|
return ret;
|
|
};
|
|
|
|
/*@
|
|
Ox.walk <f> Iterates over a nested data structure
|
|
(collection, iterator[, that]) -> <u> undefined
|
|
collection <a|o|s> Collection
|
|
iterator <f> Iterator
|
|
value <*> Value
|
|
keys <a> Array of keys
|
|
collection <a|o|s> The collection
|
|
that <o> The iterator's `this` binding
|
|
<script>
|
|
Ox.test.number = 0;
|
|
Ox.walk({a: 1, b: {c: 2, d: 3}}, function(value) {
|
|
Ox.test.number += Ox.isNumber(value) ? value : 0;
|
|
});
|
|
Ox.test.array = [];
|
|
Ox.walk({a: 1, b: {c: 2, d: 3}}, function(value, keys) {
|
|
Ox.isNumber(value) && Ox.test.array.push(keys)
|
|
});
|
|
</script>
|
|
> Ox.test.number
|
|
6
|
|
> Ox.test.array
|
|
[['a'], ['b', 'c'], ['b', 'd']]
|
|
@*/
|
|
Ox.walk = function(collection, iterator, that, keys) {
|
|
keys = keys || [];
|
|
Ox.forEach(collection, function(value, key) {
|
|
var keys_ = keys.concat(key);
|
|
iterator.call(that, value, keys_, collection);
|
|
Ox.walk(collection[key], iterator, that, keys_);
|
|
});
|
|
};
|