mirror of
https://github.com/Doodle3D/Doodle3D-API
synced 2024-06-27 14:11:21 +02:00
34 lines
1.1 KiB
JavaScript
34 lines
1.1 KiB
JavaScript
/* */
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var $ = require("./$"),
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ctx = require("./$.ctx"),
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$def = require("./$.def"),
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$iter = require("./$.iter"),
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call = require("./$.iter-call");
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$def($def.S + $def.F * !require("./$.iter-detect")(function(iter) {
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Array.from(iter);
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}), 'Array', {from: function from(arrayLike) {
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var O = Object($.assertDefined(arrayLike)),
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mapfn = arguments[1],
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mapping = mapfn !== undefined,
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f = mapping ? ctx(mapfn, arguments[2], 2) : undefined,
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index = 0,
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length,
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result,
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step,
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iterator;
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if ($iter.is(O)) {
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iterator = $iter.get(O);
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result = new (typeof this == 'function' ? this : Array);
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for (; !(step = iterator.next()).done; index++) {
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result[index] = mapping ? call(iterator, f, [step.value, index], true) : step.value;
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}
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} else {
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result = new (typeof this == 'function' ? this : Array)(length = $.toLength(O.length));
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for (; length > index; index++) {
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result[index] = mapping ? f(O[index], index) : O[index];
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}
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}
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result.length = index;
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return result;
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}});
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