Sha256: 39d52a844e101dacdbf8448d1dd9a5e4f233353c8c8496351c8d442decad8851
Contents?: true
Size: 809 Bytes
Versions: 12
Compression:
Stored size: 809 Bytes
Contents
'use strict';
// https://tc39.github.io/proposal-setmap-offrom/
var aFunction = require('../internals/a-function');
var bind = require('../internals/bind-context');
var iterate = require('../internals/iterate');
module.exports = function from(source /* , mapFn, thisArg */) {
var length = arguments.length;
var mapFn = length > 1 ? arguments[1] : undefined;
var mapping, A, n, boundFunction;
aFunction(this);
mapping = mapFn !== undefined;
if (mapping) aFunction(mapFn);
if (source == undefined) return new this();
A = [];
if (mapping) {
n = 0;
boundFunction = bind(mapFn, length > 2 ? arguments[2] : undefined, 2);
iterate(source, function (nextItem) {
A.push(boundFunction(nextItem, n++));
});
} else {
iterate(source, A.push, A);
}
return new this(A);
};
Version data entries
12 entries across 12 versions & 4 rubygems