There is a function whose name is stored in the value of another function, and I need to invoke this function using the other one.
The function I need to call is popup()
random() = 'popup()'
if ($.cookie('optin-page')) {
}
I attempted:
if ($.cookie('optin-page')) {
window[random()];
}
It is not allowed to set a value to the result of calling a function. The left side of an equation using = cannot include parentheses (). (In other words, the initial line of your code contains an error).
If you wish to invoke a global function matching the output of a function named random, you can do so like this:
window[random()]();
However, in situations like these, it is advisable to store those functions in an object and then call them as its methods:
var bar = {
x: function () {
alert('For example');
}
};
function selector() {
return "x";
}
bar[selector()]();
Instead of simply calling whatever string you receive, it might be more beneficial to use a switch statement or something similar.
var functionToCall = random();
switch(functionToCall)
{
case 'popup()':
popup();
break;
case 'function2()':
function2();
break;
default:
// throw an error INVALID FUNCTION CALLED
}
By doing this, you can implement error handling in your code.
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