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Last change
on this file since b738035 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
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initial commit
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File size:
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| 1 | 'use strict';
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| 2 | var $ = require('../internals/export');
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| 3 | var flattenIntoArray = require('../internals/flatten-into-array');
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| 4 | var toObject = require('../internals/to-object');
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| 5 | var toLength = require('../internals/to-length');
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| 6 | var aFunction = require('../internals/a-function');
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| 7 | var arraySpeciesCreate = require('../internals/array-species-create');
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| 8 |
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| 9 | // `Array.prototype.flatMap` method
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| 10 | // https://tc39.es/ecma262/#sec-array.prototype.flatmap
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| 11 | $({ target: 'Array', proto: true }, {
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| 12 | flatMap: function flatMap(callbackfn /* , thisArg */) {
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| 13 | var O = toObject(this);
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| 14 | var sourceLen = toLength(O.length);
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| 15 | var A;
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| 16 | aFunction(callbackfn);
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| 17 | A = arraySpeciesCreate(O, 0);
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| 18 | A.length = flattenIntoArray(A, O, O, sourceLen, 0, 1, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
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| 19 | return A;
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| 20 | }
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| 21 | });
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