Add solution 03 - Optional Property ?:

echoEscape · echoEscape · commit 7bfdc800c3a9 · 2023-12-22T07:30:04.000+01:00
diff --git a/src/03-optional-properties.problem.ts b/src/03-optional-properties.problem.ts
@@ -1,6 +1,6 @@
 import { expect, it } from "vitest";
 
-export const getName = (params: { first: string; last: string }) => {
+export const getName = (params: { first: string; last?: string }) => {
   if (params.last) {
     return `${params.first} ${params.last}`;
   }

Original file line number	Diff line number	Diff line change
`@@ -1,6 +1,6 @@`
`1`	`1`	`import { expect, it } from "vitest";`
`2`	`2`
`3`		`-export const getName = (params: { first: string; last: string }) => {`
	`3`	`+export const getName = (params: { first: string; last?: string }) => {`
`4`	`4`	`if (params.last) {`
`5`	`5`	return `${params.first} ${params.last}`;
`6`	`6`	`}`