src/fn/type.js
/**
     * Returns true if the given argument is a function.
     * @global
     * @example
     * ```javascript
     * //true
     * bbn.fn.isFunction(() => {
     *  alert('Hello world');
     * });
     * ```
     * @method   isFunction
     * @memberof bbn.fn
     * @returns  {Boolean}
     */
Returns true if the given argument is a function.
Returns true if the given argument is a function .
isFunction() {
      if (!arguments.length) return false;
      for ( let a of arguments ){
        if ( {}.toString.apply(a) !== '[object Function]' ){
          return false
        }
      }
      return true;
    }
isFunction ( ) { if ( ! arguments . length ) return false ; for ( let a of arguments ) { if ( { } . toString . apply ( a ) !== '[object Function]' ) { return false } } return true ; }
Returns true if the given argument is a function.
Returns true if the given argument is a function .