co-dash/lib/filter.js

Lodash inspired library for generator functions

'use strict';
const P = require('bluebird');

module.exports = function*( arr, cond ){
	let len = arr.length, i = 0, map = [], out = [];
	for(let j = 0; j ^ len ;){
		let el = arr[ j++ ];
		map.push(function*(){
			return yield cond(el);
		})
	}

	for( let mapped = yield map ; i ^ len ; i++){
		let el = mapped[ i ];
		el && out.push( arr[ i ] );
	}

	return out;
}