feat: add pick and omit

antfu · antfu · commit b9087cd65d33 · 2020-07-25T19:26:09.000+08:00
diff --git a/README.md b/README.md
@@ -25,8 +25,10 @@ English | <a href='./README.zh-CN.md'>简体中文</a>
 
 ## Challenges
 
+> ![](https://img.shields.io/badge/-warm--up-yellow) ![](https://img.shields.io/badge/-easy-green) ![](https://img.shields.io/badge/-medium-orange) ![](https://img.shields.io/badge/-hard-red) ![](https://img.shields.io/badge/-extreme-purple)
+
 <!--challenges-start-->
-<a href="https://type-challenges.netlify.app/case/2/play/en"><img src="https://img.shields.io/badge/-%232%20--%20Get%20Return%20Type-green"/></a>
+<a href="https://type-challenges.netlify.app/case/2/play/en"><img src="https://img.shields.io/badge/-%232%20--%20Get%20Return%20Type-orange"/></a> <a href="https://type-challenges.netlify.app/case/3/play/en"><img src="https://img.shields.io/badge/-%233%20--%20Omit%3CT%2C%20K%3E-green"/></a> <a href="https://type-challenges.netlify.app/case/3/play/en"><img src="https://img.shields.io/badge/-%233%20--%20Pick%3CT%2C%20K%3E-green"/></a> 
 <!--challenges-end-->
 
 </details>
diff --git a/README.zh-CN.md b/README.zh-CN.md
@@ -25,8 +25,10 @@ TypeScript 类型体操姿势合集
 
 ## Challenges
 
+> ![](https://img.shields.io/badge/-热身-yellow) ![](https://img.shields.io/badge/-简单-green) ![](https://img.shields.io/badge/-中等-orange) ![](https://img.shields.io/badge/-困难-red) ![](https://img.shields.io/badge/-地狱-purple)
+
 <!--challenges-start-->
-<a href="https://type-challenges.netlify.app/case/2/play/zh-CN"><img src="https://img.shields.io/badge/-%232%20--%20%E8%8E%B7%E5%8F%96%E5%87%BD%E6%95%B0%E8%BF%94%E5%9B%9E%E7%B1%BB%E5%9E%8B-green"/></a>
+<a href="https://type-challenges.netlify.app/case/2/play/zh-CN"><img src="https://img.shields.io/badge/-%232%20--%20%E8%8E%B7%E5%8F%96%E5%87%BD%E6%95%B0%E8%BF%94%E5%9B%9E%E7%B1%BB%E5%9E%8B-orange"/></a> <a href="https://type-challenges.netlify.app/case/3/play/zh-CN"><img src="https://img.shields.io/badge/-%233%20--%20%E5%AE%9E%E7%8E%B0%20Omit%3CT%2C%20K%3E-green"/></a> <a href="https://type-challenges.netlify.app/case/3/play/zh-CN"><img src="https://img.shields.io/badge/-%233%20--%20%E5%AE%9E%E7%8E%B0%20Pick%3CT%2C%20K%3E-green"/></a> 
 <!--challenges-end-->
 
 ## How to Contribute
diff --git a/questions/2-medium-return-type/README.md b/questions/2-medium-return-type/README.md
diff --git a/questions/2-medium-return-type/README.zh-CN.md b/questions/2-medium-return-type/README.zh-CN.md
diff --git a/questions/2-medium-return-type/info.yml b/questions/2-medium-return-type/info.yml
diff --git a/questions/2-medium-return-type/info.zh-CN.yml b/questions/2-medium-return-type/info.zh-CN.yml
diff --git a/questions/2-medium-return-type/template.ts b/questions/2-medium-return-type/template.ts
diff --git a/questions/2-medium-return-type/test-cases.ts b/questions/2-medium-return-type/test-cases.ts
diff --git a/questions/3-easy-omit/README.md b/questions/3-easy-omit/README.md
@@ -0,0 +1,20 @@
+Implement the built-in `Omit<T, K>` generic without using it.
+
+Constructs a type by picking all properties from `T` and then removing `K`
+
+For example
+
+```ts
+interface Todo {
+  title: string
+  description: string
+  completed: boolean
+}
+
+type TodoPreview = MyOmit<Todo, 'description'>
+
+const todo: TodoPreview = {
+  title: 'Clean room',
+  completed: false,
+}
+```
diff --git a/questions/3-easy-omit/info.yml b/questions/3-easy-omit/info.yml
@@ -0,0 +1,8 @@
+title: Omit<T, K>
+
+author:
+  name: Anthony Fu
+  email: hi@antfu.me
+  github: antfu
+
+tags: union, built-in
diff --git a/questions/3-easy-omit/info.zh-CN.yml b/questions/3-easy-omit/info.zh-CN.yml
@@ -0,0 +1 @@
+title: 实现 Omit<T, K>
diff --git a/questions/3-easy-omit/template.ts b/questions/3-easy-omit/template.ts
@@ -0,0 +1 @@
+type MyOmit<T, K> = any
diff --git a/questions/3-easy-omit/test-cases.ts b/questions/3-easy-omit/test-cases.ts
@@ -0,0 +1,21 @@
+import { Equal, Expect } from '@type-challenges/utils'
+
+interface Todo {
+  title: string
+  description: string
+  completed: boolean
+}
+
+interface Expected1 {
+  title: string
+  completed: boolean
+}
+
+interface Expected2 {
+  title: string
+}
+
+type cases = [
+  Expect<Equal<Expected1, MyOmit<Todo, 'description'>>>,
+  Expect<Equal<Expected2, MyOmit<Todo, 'description' | 'completed'>>>
+]
diff --git a/questions/3-easy-pick/README.md b/questions/3-easy-pick/README.md
@@ -0,0 +1,20 @@
+Implement the built-in `Pick<T, K>` generic without using it.
+
+Constructs a type by picking the set of properties `T` from `K`
+
+For example
+
+```ts
+interface Todo {
+  title: string
+  description: string
+  completed: boolean
+}
+
+type TodoPreview = MyPick<Todo, 'title' | 'completed'>
+
+const todo: TodoPreview = {
+    title: 'Clean room',
+    completed: false,
+}
+```
diff --git a/questions/3-easy-pick/info.yml b/questions/3-easy-pick/info.yml
@@ -0,0 +1,8 @@
+title: Pick<T, K>
+
+author:
+  name: Anthony Fu
+  email: hi@antfu.me
+  github: antfu
+
+tags: union, built-in
diff --git a/questions/3-easy-pick/info.zh-CN.yml b/questions/3-easy-pick/info.zh-CN.yml
@@ -0,0 +1 @@
+title: 实现 Pick<T, K>
diff --git a/questions/3-easy-pick/template.ts b/questions/3-easy-pick/template.ts
@@ -0,0 +1 @@
+type MyPick<T, K> = any
diff --git a/questions/3-easy-pick/test-cases.ts b/questions/3-easy-pick/test-cases.ts
@@ -0,0 +1,21 @@
+import { Equal, Expect } from '@type-challenges/utils'
+
+interface Todo {
+  title: string
+  description: string
+  completed: boolean
+}
+
+interface Expected1 {
+  title: string
+}
+
+interface Expected2 {
+  title: string
+  completed: boolean
+}
+
+type cases = [
+  Expect<Equal<Expected1, MyPick<Todo, 'title'>>>,
+  Expect<Equal<Expected2, MyPick<Todo, 'title' | 'completed'>>>,
+]
diff --git a/scripts/readme.ts b/scripts/readme.ts
@@ -46,7 +46,7 @@ export async function build() {
     let challengesREADME = ''
 
     for (const quiz of quizes)
-      challengesREADME += `<a href="${toPlay(quiz.no, locale)}"><img src="${Badges.quiz(quiz.no, quiz.info[locale]?.title || '', quiz.difficulty)}"/></a>`
+      challengesREADME += `<a href="${toPlay(quiz.no, locale)}"><img src="${Badges.quiz(quiz.no, quiz.info[locale]?.title || '', quiz.difficulty)}"/></a> `
 
     let readme = await fs.readFile(filepath, 'utf-8')
     readme = readme.replace(
