Javascript if else loop?

Question

I'm sure there probably is, however I'm not sure what it's called so apologises if this is something super similar. I'm wondering if there's a faster way to code the following:

var b = "#ff0002";
var o = "#46c029";
var i = "#f2ec00";
var n = "#f64c98";
var g = "#52c6f3";

if(a==1){
    return b;
}else if(a==2){
    return o;
}else if(a==3){
    return i;
}else if(a==4){
    return n;
}else if(a==5){
    return g;
}

Answer 1

Yeah, lookup array:

return [b, o, i, n, g][a - 1];

Not necessarily faster, but definetly shorter :)

Answer 2

If you have large number of strings to compare from use Object like this:

myObj = {1: '#ff0002', 2: '#46c029', 3: "#f2ec00", 4: "#f64c98", 5: "#52c6f3"}

console.log(myObj[3]);

If you are using ES6 you can use Map() like this:

const myMap = new Map([[1, '#ff0002'], [2, '#46c029'], [3, "#f2ec00"], [4, "#f64c98"], [5, "#52c6f3"]])

console.log(myMap.get(3)); // or any key