Switch off

Instead of a bulky switch/case, like this:

var out = "";
switch(lang)
{
 case "JavaScript":
 out = "JS";
 break;
 case "Ruby":
 out = "RB";
 break;
 case "C#":
 out = "CS";
 break;
 default:
 out = "CPP";
 break;
}

Just do a complex ternary, like this:

var out = lang == "JavaScript" ? "JS"
 : lang == "Ruby" ? "RB"
 : lang == "C#" ? "CS"
 : "CPP";

It's much cleaner and smaller, and even takes less time to write!