我想以 j字写成一种功能,有各种不同的论点。 下面的一个例子是,我如何称职:
myFunction(1,2);
myFunction(1,2,3);
myFunction(1,2,3,4);
myFunction(1,2,3,4,5);
myFunction(1,2,3,4,5,6);
任何人都知道如何界定这一职能?
我想以 j字写成一种功能,有各种不同的论点。 下面的一个例子是,我如何称职:
myFunction(1,2);
myFunction(1,2,3);
myFunction(1,2,3,4);
myFunction(1,2,3,4,5);
myFunction(1,2,3,4,5,6);
任何人都知道如何界定这一职能?
You can access the arguments by their ordinal position without the need to state them in the prototype as follows:
function myFunction() {
for (var i = 0; i < arguments.length; i++)
alert(arguments[i]);
}
myFunction(1, 2, "three");
>>1
>>2
>>three
或者,如果你真的通过一组与地震有关的数字,你可以使用一个阵列;
function myFunction(arr) { ... }
result = myFunction([1,2,3]);
Rest parameters are supported in all new browsers. Check here for details
其余参数的辛迪加允许我们作为阵列代表无限数目的论点,你们也可以把这种论点传给其他职能。
function myFunction(...data){
console.log(...data);
myOtherFunction(...data);
}
myFunction(1,2,3); //logs 1,2,3
myFunction([1,2,3]); //logs [1,2,3]
3. 利用各种论点,如:
function myFunction() {
alert(arguments.length + arguments );
for( var i = 0; i < arguments.length; i++ ) {
alert(arguments[i]);
}
}
采用你以前的做法
myFunction(1,2);
myFunction(1,2,3,4,5,6);
如果没有论据,就使用违约。 和......
function accident() {
//Mandatory Arguments
var driver = arguments[0];
var condition = arguments[1]
//Optional Arguments
var blame_on = (arguments[2]) ? arguments[2] : "Irresponsible tree" ;
}
accident("Me","Drunk");
作为补充: 如(german wiki)。
arguments[0] = 5;
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