Question

In the scenario below, I have a boolean value. Depending on the result, I call the exact same function with the only difference being the number of parameters.

var myBoolean = ...

if (myBoolean) {
    retrieveData(param1, function(err, result) {
        if (err) throw err;
        // process
    });
}
else {
    retrieveData(param1, param2, function(err, result) {
        if (err) throw err;
        // process
    });
}

At the moment it feels like I’m repeating a lot of code unnecessarily. Is there a way to consolidate this so I’m not repeating the same thing?

Answer 1

If the situation is as simple as this, then just save the repeated function in a variable:

var myBoolean = ...
var callback = function(err, result) {
    if (err) throw err;
    // process
}
if (myBoolean) {
    retrieveData(param1, callback);
}
else {
    retrieveData(param1, param2, callback);
}