JavaScript function overloading

JavaScript, while mostly object-oriented, does not support function overloading like Java and other common OO languages. To my less knowledgeable audience, overloading is use of the same function name with a different number of arguments or types.

NOTE: there are various ways to implement this sort of functionality using various frameworks, but legacy code can be full of these issues!

In the following code, they share the same name, the second function will always be executed as it is defined last!


<script type="text/javascript">
function doSomething(arg1, arg2){
alert('2 args');
}
function doSomething(arg1){
alert('1 arg');
}
</script>

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