Select Objects in Array Based on Regex Match

Question

How can I return only the objects in an array that meet a certain criteria using javascript?

For instance, if I have [\'apple\',\'avocado\',\'banana\',\'cherry\'] an

Answer 1

Your problem is with generating your regex on the fly. You cannot make a valid regex by concatenating strings. You have to use the constructor: RegExp() to make a regex from a string.

Here is my function for matching an array:

   function matcharray(regexp, array) {
        var filtered = [];
        for (i = 0; i < array.length; i++) {
            if (regexp.test(array[i])) {
                filtered.push(array[i]);
            }
        }
        return filtered;
    }

You could call this function like so:

var myregex = "abc";
alert(matcharray(new RegExp(myregex), my_array).join());