libs/lodash.js
function isArguments(value) {
      return (value && typeof value == 'object' && typeof value.length == 'number' &&
        toString.call(value) == argsClass) || false;
    }
function isArguments(value) {
      return (value && typeof value == 'object' && typeof value.length == 'number' &&
        toString.call(value) == argsClass) || false;
    }
function isArguments ( value ) { return ( value && typeof value == 'object' && typeof value . length == 'number' && toString . call ( value ) == argsClass ) || false ; }
Checks if `value` is an `arguments` object.

@static
@memberOf _
@category Objects
@param {*} value The value to check.
@returns {boolean} Returns `true` if `value` is an `arguments` object, else `false`.
@example

(function() { return _.isArguments(arguments); })();
// => true

_.isArguments([1, 2, 3]);
// => false
Checks if value is an arguments object .