Thinking about alternate ways of defining a variable based on the value of another

switch.js

// You need to get a new value based on the value of another variable, 
// an if statement could get a bit messy so you might use a switch:
let someVariable;
switch (type) {
  case 'bla':
    someVariable 'someValue';
    break;
  …
}
// This syntax is a bit of a bother, first having to define the variable and 
// adding "break" after evert case.

// Actually “returning” a value makes more sense here, but in order to do that
// we would need to extract it in a function somewhere, and being indirect:
const bla = blaFromType(type); 

// Ideally, this would work:
const someVariable = switch (type) {
  case 'bla':
    return 'someValue';
  …
}
// … but it doesn't

// Although… with ES6, you could do a self-executing
// arrow function and get close to what we would want.
const someVariable = (() => { switch(type) {
  case 'bla':
    return 'someValue'
  …
}})();