在一个函数体内,标识符arguments具有特殊含义. Arguments对象是一个类似数组的对象 eg: 验证函数参数的正确数目 function f(x, y, z) { if (arguments.length != 3) { throw new Error("function with " + arguments.length + "arguments, but it expects 3 arguments.") // now do the actual f…
In PHP 5.6 and later, argument lists may include the ... token to denote that the function accepts a variable number of arguments. The arguments will be passed into the given variable as an array; for example: Example #13 Using ... to access variable…