/**
 * Helper function for iterating over a collection
 *
 * @param collection
 * @param fn
 */
function each(collection, fn) {
    var i      = 0,
        length = collection.length,
        cont;

    for(i; i < length; i++) {
        cont = fn(collection[i], i);
        if(cont === false) {
            break; //allow early exit
        }
    }
}

/**
 * Helper function for determining whether target object is an array
 *
 * @param target the object under test
 * @return {Boolean} true if array, false otherwise
 */
function isArray(target) {
    return Object.prototype.toString.apply(target) === '[object Array]';
}

/**
 * Helper function for determining whether target object is a function
 *
 * @param target the object under test
 * @return {Boolean} true if function, false otherwise
 */
function isFunction(target) {
    return typeof target === 'function';
}

module.exports = {
    isFunction : isFunction,
    isArray : isArray,
    each : each
};