Yesterday, I wrote a piece of code wherein, on clicking a button, a variable had to be incremented.
The following does this:
var bar = 0;
function foo() {
return bar++;
}
Variable bar will be incremented each time function foo is called.But, what if we don’t want to use global variables? JavaScript closure to the rescue.
var foo = (function () {
var bar = 0;
return function() {
return bar++;
}
})();
Functionality of the above is the same as that of the first function but, here variable bar is no longer a global variable.
If you are allergic to closures, below function can also be used to eliminate the global variable.
function foo() {
if (! foo.bar) {
foo.bar = 0;
}
return foo.bar++;
}
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