how to map an array with uppercase function in javascript?

Question

I\'m interested if there is any function like array_map or array_walk from php.

Don\'t need an for that travels all the array. I can do that for myself.

Answer 1

This may be an overkill but you can also do

var upperCaseArray = array.map(String.prototype.toUpperCase.call.bind(String.prototype.toUpperCase));

Answer 2

Similar to a previous for loop answer, this one uses some of the more basic features of javascript:

function looptoUpper(arr){
    var newArr = [];
    for (var i = 0; i < arr.length; i++){
        newArr.push(arr[i].toUpperCase());
    }
    return newArr;
}
looptoUpper(['dom', 'lun', 'mar', 'mer', 'gio', 'ven', 'sab']);

Answer 3

Javascript has a map() method. A good reference is at http://www.tutorialspoint.com/javascript/array_map.htm

Answer 4

And here is the one-liner without creating a loop or a function that is ES3 compatible It's alos faster since you only call toUpperCase once

// watch out for strings with comma (eg: ["hi, max"]) then use custom join/split()
// or just use something safer such as Array.map()
var uppercaseArray = array.toString().toUpperCase().split(",");
var uppercaseArray = array.join(0).toUpperCase().split(0);
var uppercaseArray = (array+"").toUpperCase().split(",");