82f2b76e25
We now use webpack instead of SystemJS, effectively bundling modules into one file (plus commons chunks) for every entry point. This results in a much smaller extension size (almost half). Furthermore we use yarn/npm even for extension run-time dependencies. This relieves us from manually vendoring and building dependencies. It's also easier to understand for new developers familiar with node.
37 lines
1.5 KiB
JavaScript
37 lines
1.5 KiB
JavaScript
'use strict';
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var ctx = require('./$.ctx')
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, $export = require('./$.export')
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, toObject = require('./$.to-object')
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, call = require('./$.iter-call')
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, isArrayIter = require('./$.is-array-iter')
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, toLength = require('./$.to-length')
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, getIterFn = require('./core.get-iterator-method');
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$export($export.S + $export.F * !require('./$.iter-detect')(function(iter){ Array.from(iter); }), 'Array', {
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// 22.1.2.1 Array.from(arrayLike, mapfn = undefined, thisArg = undefined)
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from: function from(arrayLike/*, mapfn = undefined, thisArg = undefined*/){
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var O = toObject(arrayLike)
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, C = typeof this == 'function' ? this : Array
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, $$ = arguments
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, $$len = $$.length
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, mapfn = $$len > 1 ? $$[1] : undefined
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, mapping = mapfn !== undefined
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, index = 0
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, iterFn = getIterFn(O)
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, length, result, step, iterator;
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if(mapping)mapfn = ctx(mapfn, $$len > 2 ? $$[2] : undefined, 2);
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// if object isn't iterable or it's array with default iterator - use simple case
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if(iterFn != undefined && !(C == Array && isArrayIter(iterFn))){
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for(iterator = iterFn.call(O), result = new C; !(step = iterator.next()).done; index++){
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result[index] = mapping ? call(iterator, mapfn, [step.value, index], true) : step.value;
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}
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} else {
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length = toLength(O.length);
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for(result = new C(length); length > index; index++){
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result[index] = mapping ? mapfn(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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});
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