tasks/sass_bootstrapper.js
function findIndexInArray(array, callback) {
        var _length = array.length;
        for (var i = 0; i < _length; i++) {
            if (callback(array[i])) return i;
        }
        return -1;
    }
function findIndexInArray(array, callback) {
        var _length = array.length;
        for (var i = 0; i < _length; i++) {
            if (callback(array[i])) return i;
        }
        return -1;
    }
function findIndexInArray ( array , callback ) { var _length = array . length ; for ( var i = 0 ; i < _length ; i ++ ) { if ( callback ( array [ i ] ) ) return i ; } return - 1 ; }
Find position of an array element when callback function
return true.

@param array {array} Array to seek
@param callback {function} Callback function to test element
@returns {number} Index of eleement or -1 if not found
Find position of an array element when callback function return true .