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musix-oss/node_modules/core-js/modules/es.array.flat-map.js

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2020-03-03 20:30:50 +00:00
'use strict';
var $ = require('../internals/export');
var flattenIntoArray = require('../internals/flatten-into-array');
var toObject = require('../internals/to-object');
var toLength = require('../internals/to-length');
var aFunction = require('../internals/a-function');
var arraySpeciesCreate = require('../internals/array-species-create');
// `Array.prototype.flatMap` method
// https://github.com/tc39/proposal-flatMap
$({ target: 'Array', proto: true }, {
flatMap: function flatMap(callbackfn /* , thisArg */) {
var O = toObject(this);
var sourceLen = toLength(O.length);
var A;
aFunction(callbackfn);
A = arraySpeciesCreate(O, 0);
A.length = flattenIntoArray(A, O, O, sourceLen, 0, 1, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
return A;
}
});