add async module
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rolux
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182
source/Ox/js/Async.js
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182
source/Ox/js/Async.js
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(function() {
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function asyncMap(forEach, col, iterator, that, callback) {
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var type = Ox.typeOf(col),
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results = type == 'object' ? {} : [];
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callback = Ox.last(arguments);
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that = arguments.length == 5 ? that : null;
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forEach(col, function(val, key, obj, callback) {
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iterator(val, key, obj, function(v) {
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results[key] = v;
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callback();
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});
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}, that, function() {
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callback(type == 'string' ? results.join('') : results);
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});
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};
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Ox.asyncMap = function(arr, iterator, that, callback) {
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callback = Ox.last(arguments);
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that = arguments.length == 4 ? that : null;
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if (arr.some(Ox.isArray)) {
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Ox.serialMap(arr, function(val, key, obj, callback) {
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Ox.parallelMap(Ox.makeArray(val), iterator, callback);
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}, callback);
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} else {
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Ox.parallelMap(Ox.makeArray(val), iterator, callback);
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}
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};
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/*@
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Ox.nonblockingForEach <f> Non-blocking forEach
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(col, iterator[, that], callback[, ms]) -> <u> undefined
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@*/
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Ox.nonblockingForEach = function(col, iterator, that, callback, ms) {
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var i, keys, last = Ox.last(arguments), n, time = +new Date();
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callback = Ox.isFunction(last) ? last : arguments[arguments.length - 2];
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col = type == 'array' || type == 'object' ? col : Ox.toArray(col);
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keys = type == 'object' ? Object.keys(col) : Ox.range(col.length);
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ms = ms || 1000;
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n = Ox.len(col);
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that = arguments.length == 5 || (
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arguments.length == 4 && Ox.isFunction(last)
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) ? that : null;
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iterate();
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function iterate() {
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keys[i] in col && iterator.call(that, col[keys[i]], keys[i], col, function() {
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if (++i < n) {
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if (+new Date() < time + ms) {
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iterate();
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} else {
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setTimeout(function() {
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time += new Date();
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iterate();
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});
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}
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} else {
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callback();
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}
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});
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}
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};
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Ox.nonblockingMap = function() {
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asyncMap.apply(null, [Ox.nonblockingForEach].concat(Ox.toArray(arguments)));
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};
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/*@
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Ox.parallelForEach <f> forEach with asynchronous iterator, running in parallel
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(col, iterator[, that], callback) -> <u> undefined
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col <a|o|s> Collection
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iterator <f> Iterator function
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val <*> Value
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key <n|s> Key
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obj <a|o> The collection
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callback <f> Callback function
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that <o> The iterator's this binding
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callback <f> Callback function
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@*/
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Ox.parallelForEach = function(col, iterator, that, callback) {
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var i = 0, n, type = Ox.typeOf(col);
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callback = Ox.last(arguments);
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col = type == 'array' || type == 'object' ? col : Ox.toArray(col);
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n = Ox.len(col);
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that = arguments.length == 4 ? that : null;
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Ox.forEach(col, function(val, key, obj) {
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iterator.call(that, val, key, obj, function() {
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++i == n && callback();
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});
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});
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};
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/*@
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Ox.parallelMap <f> Parallel map with asynchronous iterator
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(col, iterator[, that], callback) -> <u> undefined
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col <a|o|s> Collection
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iterator <f> Iterator function
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val <*> Value
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key <n|s> Key
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obj <a|o|s> The collection
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callback <f> Callback function
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that <o> The iterator's this binding
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callback <f> Callback function
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results <a|o|s> Results
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<script>
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var time = +new Date();
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Ox.parallelMap(
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Ox.range(10),
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function (value, index, array, callback) {
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setTimeout(function() {
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callback(+new Date() - time);
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}, Ox.random(1000));
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},
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function(results) {
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Ox.print(results);
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}
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);
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</script>
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@*/
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Ox.parallelMap = function() {
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asyncMap.apply(null, [Ox.parallelForEach].concat(Ox.toArray(arguments)));
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};
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/*@
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Ox.serialForEach <f> forEach with asynchronous iterator, run serially
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(col, iterator[, that], callback) -> <u> undefined
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col <a|o|s> Collection
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iterator <f> Iterator function
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val <*> Value
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key <n|s> Key
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obj <a|o> The collection
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callback <f> Callback function
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that <o> The iterator's this binding
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callback <f> Callback function
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@*/
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Ox.serialForEach = function(col, iterator, that, callback) {
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var i = 0, keys, n, type = Ox.typeOf(col);
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callback = Ox.last(arguments);
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col = type == 'array' || type == 'object' ? col : Ox.toArray(col);
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keys = type == 'object' ? Object.keys(col) : Ox.range(col.length);
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n = Ox.len(col);
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that = arguments.length == 4 ? that : null;
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iterate();
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function iterate() {
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keys[i] in col && iterator.call(that, col[keys[i]], keys[i], col, function() {
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++i < n ? iterate() : callback();
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});
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}
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};
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/*@
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Ox.serialMap <f> Serial map with asynchronous iterator
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(col, iterator[, that], callback) -> <u> undefined
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col <a|o|s> Collection
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iterator <f> Iterator function
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val <*> Value
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key <n|s> Key
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obj <a|o> The collection
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callback <f> Callback function
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that <o> The iterator's this binding
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callback <f> Callback function
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err <o|u> Error object
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results <a|o> Results
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<script>
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var time = +new Date();
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Ox.serialMap(
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Ox.range(10),
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function (value, index, array, callback) {
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setTimeout(function() {
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callback(+new Date() - time);
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}, Ox.random(1000));
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},
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function(results) {
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Ox.print(results);
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}
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);
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</script>
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@*/
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Ox.serialMap = function(col, iterator, that, callback) {
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asyncMap.apply(null, [Ox.serialForEach].concat(Ox.toArray(arguments)));
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};
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}());
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