dist/lumx.js
function _findIndex(haystack, needle) {
            if (angular.isUndefined(haystack) || haystack.length === 0) {
                return -1;
            }

            for (var i = 0, len = haystack.length; i < len; i++) {
                if (haystack[i] === needle) {
                    return i;
                }
            }

            return -1;
        }
function _findIndex(haystack, needle) {
            if (angular.isUndefined(haystack) || haystack.length === 0) {
                return -1;
            }

            for (var i = 0, len = haystack.length; i < len; i++) {
                if (haystack[i] === needle) {
                    return i;
                }
            }

            return -1;
        }
function _findIndex ( haystack , needle ) { if ( angular . isUndefined ( haystack ) || haystack . length === 0 ) { return - 1 ; } for ( var i = 0 , len = haystack . length ; i < len ; i ++ ) { if ( haystack [ i ] === needle ) { return i ; } } return - 1 ; }
Find the index of an element in an array.

@param  {Array}  haystack The array in which to search for the value.
@param  {*}      needle   The value to search in the array.
@return {number} The index of the value of the array, or -1 if not found.
Find the index of an element in an array .