You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
25 lines
906 B
25 lines
906 B
4 weeks ago
|
'use strict';
|
||
|
|
// https://tc39.github.io/proposal-setmap-offrom/
|
||
|
|
var bind = require('../internals/function-bind-context');
|
||
|
|
var anObject = require('../internals/an-object');
|
||
|
|
var toObject = require('../internals/to-object');
|
||
|
|
var iterate = require('../internals/iterate');
|
||
|
|
|
||
|
|
module.exports = function (C, adder, ENTRY) {
|
||
|
|
return function from(source /* , mapFn, thisArg */) {
|
||
|
|
var O = toObject(source);
|
||
|
|
var length = arguments.length;
|
||
|
|
var mapFn = length > 1 ? arguments[1] : undefined;
|
||
|
|
var mapping = mapFn !== undefined;
|
||
|
|
var boundFunction = mapping ? bind(mapFn, length > 2 ? arguments[2] : undefined) : undefined;
|
||
|
|
var result = new C();
|
||
|
|
var n = 0;
|
||
|
|
iterate(O, function (nextItem) {
|
||
|
|
var entry = mapping ? boundFunction(nextItem, n++) : nextItem;
|
||
|
|
if (ENTRY) adder(result, anObject(entry)[0], entry[1]);
|
||
|
|
else adder(result, entry);
|
||
|
|
});
|
||
|
|
return result;
|
||
|
|
};
|
||
|
|
};
|