Enums

enums.ts

enum E1 {
  K1 = "v1",
  K2 = "v2",
  K3 = "v3"
}

enum E2 {
  K1 = "v1",
  K2 = "v2",
  K4 = "v4"
}

type E3 = "v1" | "v2" | "v3";
type E4 = "v1" | "v2";

const enum E5 {
  K1 = "v1",
  K2 = "v2",
  K3 = "v3"
}

// For each: Is it valid? If yes, what's the value?

// A
const var1: E1 = E2.K1;

// B
const var2: E3 = E1.K1;

// C
const var3: E1 = "v1";

// D
const var4: E1 = E1["K1"];

// E
const var5: E5 = E5["K1"];

// F
const var6: E5 = E5["boop"];

// G
const var7: E1 = E1["boop"];

// H
function convertE3FromE1(var1: E1): E3 {
  const var2: E3 = var1;
  return var2;
}

// I
function convertE4FromE1(var1: E1): E4 {
  const var2: E4 = var1;
  return var2;
}

// J
function convertE1FromE3(var1: E3): E1 {
  const var2: E1 = var1;
  return var2;
}

// K
function convertE1FromString(var1: string): E1 {
  const var2: E1 = E1[var1];
  return var2;
}

// L
function convertE5FromString(var1: string): E5 {
  const var2: E5 = E5[var1];
  return var2;
}

function convertE1FromSomething(var1: keyof typeof E1): E1 {
  const var2: E1 = E1[var1];
  return var2;
}

// M
const var8: E1 = convertE1FromSomething("K1");

// N
const var9: E1 = convertE1FromSomething(E2.K1);

// O
const var10: E1 = convertE1FromSomething(E2[E2.K1]);

// P
const var11: E1 = convertE1FromSomething(E5[E5.K1]);