How can implement overloading in JavaScript/jQuery?
I trying to call functions with same signature.
example: There are two functions with same name:
<script>
var obj1,obj2,obj3,obj4,obj5;
function OpenBox(obj1,obj2){
// code
}
function OpenBox(obj1,obj2,obj3,obj4,obj5){
// code
}
</script>
When I calling function on click event of link
<a id='hlnk1' href='#' onclick='OpenBox(this,"abhishek"); return false;'> Open Box </a>
When I click on the above link it is calling function OpenBox(obj1,obj2,obj3,obj4,obj5) {}
It should be call function OpenBox(obj1,obj2) {} Instead.
What's going wrong in functions?
mattn has the correct idea. Because javascript has no typing those functions are equivalent. What you could do is something like this:
function OpenBox_impl1(obj1,obj2){
// code
}
function OpenBox_impl2(obj1,obj2,obj3,obj4,obj5){
// code
}
function OpenBox(obj1, obj2, obj3, obj4, obj5) {
if(arguments.length == 2)
return OpenBox_impl1(obj1, obj2);
else
return OpenBox_impl2(obj1,obj2,obj3,obj4,obj5);
}
javascript can't define duplicate function in same scope. check arguments.length are 2 or 5.
@abshik ,
There is nothing like that which is similar to c# or java. Javasccript behaves this way
function Test(arg1 ,arg2 , arg3, arg4)
{
}
when you are calling this function you can call in the following ways
Test(arg1);
Test(arg1,arg2);
Test(arg1,arg2,arg3);
Test(arg1,arg2,arg3,arg4);
But sequence matters , so you can the function in the above ways.
链接地址: http://www.djcxy.com/p/51982.html上一篇: 在JavaScript中的多个构造函数