Sha256: cf390953d64bb86bca2ae66d771716a9c51fa04a2c13b5e0abe2494aecaa306e
Contents?: true
Size: 818 Bytes
Versions: 13
Compression:
Stored size: 818 Bytes
Contents
'use strict';
// https://tc39.github.io/proposal-setmap-offrom/
var aFunction = require('../internals/a-function');
var bind = require('../internals/function-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
13 entries across 13 versions & 4 rubygems