Javascript Differences Defining A Function
I just bought the newest version of 'JavaScript: The Definitive Guide' and already have a question. :D Are the following lines semantically the same: var square = function(n){
Solution 1:
Check this out:
a(); // prints 'A'functiona(){
console.log('A');
};
and this:
b(); // throws error. b is not a functionvar b = function() {
console.log('B');
};
Did you notice the difference?
Solution 2:
Yes, they do the exact same thing.
The main advantage of the first approach is that it gives you a reference to that function so that you could pass it to another function or attach it to an object if you need to.
Solution 3:
Difference is that in the first solution, you can do that :
var square = function(n){
return n * n;
};
// some code
square = function(n) { return n*n*n; }
you have reference to a function. On the other solution, the function is statically declared.
Disclaimer: need JS guru to tell me if I'm wrong =).
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