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23 lines
740 B
JavaScript
23 lines
740 B
JavaScript
'use strict';
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// https://tc39.github.io/proposal-flatMap/#sec-Array.prototype.flatMap
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var $export = require('./_export');
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var flattenIntoArray = require('./_flatten-into-array');
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var toObject = require('./_to-object');
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var toLength = require('./_to-length');
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var aFunction = require('./_a-function');
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var arraySpeciesCreate = require('./_array-species-create');
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$export($export.P, 'Array', {
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flatMap: function flatMap(callbackfn /* , thisArg */) {
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var O = toObject(this);
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var sourceLen, A;
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aFunction(callbackfn);
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sourceLen = toLength(O.length);
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A = arraySpeciesCreate(O, 0);
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flattenIntoArray(A, O, O, sourceLen, 0, 1, callbackfn, arguments[1]);
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return A;
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}
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});
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require('./_add-to-unscopables')('flatMap');
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