How To Store Operator In Variable Using Javascript
I want to store '+' operator in variable.
Solution 1:
Avoiding the use of eval, I would recommend to use a map of functions :
var operators = {
'+': function(a, b){ return a+b},
'-': function(a, b){ return a-b}
}
Then you can use
var key = '+';
var c = operators[key](3, 5);
Note that you could also store operators[key] in a variable.
Solution 2:
You cannot store an operator in JavaScript like you have requested. You can store a function to a variable and use that instead.
var plus = function(a, b) {
return a + b;
}
Sorry, but JavaScript does not allow this operator overloading.
Solution 3:
You cannot.
There are ways to use javascript to implement custom versions of operators by playing into the available hooks, but there is no possible way to turn m functionally into +.
@dystroy has an excellent example of using the available hooks to implement a custom version of operators, but note that it is still just a classic example of using an object to access functions which do some work.
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