function find(arr, func) { //var num = 0; //return num; var res = arr.filter(func); if(res.length){ return res[0]; } return undefined; } find([1, 2, 3, 4], function(num){ return num % 2 === 0; });
function find(arr, func) { //var num = 0; //return num; var res = arr.filter(func); if(res.length){ return res[0]; } return undefined; } find([1, 2, 3, 4], function(num){ return num % 2 === 0; });