Comments (4)
Alternatively,
type Pop<T extends any[]> = T extends [...infer H, infer _] ? H : []
from type-challenges-solutions.
Update for new test case.
Expect<Equal<Pop<[]>, []>>
type Pop<T extends any[]> = T["length"] extends 0 ? [] : T extends [...infer H, infer T] ? H : never
from type-challenges-solutions.
Following the previous exercise that I did not understand (and I still don't), here's my solution and extras from the same challenge, that were optional.
type Pop<T extends unknown[]> = T extends [...infer L, unknown] ? L : never
type Push<T extends unknown[], V> = [...T, V]
type Shift<T extends unknown[]> = T extends [unknown, ...infer F] ? F : never
type Unshift<T extends unknown[], V> = [V, ...T]
Test cases:
type cases = [
Expect<Equal<Pop<[3, 2, 1]>, [3, 2]>>,
Expect<Equal<Pop<['a', 'b', 'c', 'd']>, ['a', 'b', 'c']>>,
Expect<Equal<Push<[1, 2, 3], 4>, [1, 2, 3, 4]>>,
Expect<Equal<Push<['a', 'b', 'c'], 'd'>, ['a', 'b', 'c', 'd']>>,
Expect<Equal<Shift<[1, 2, 3]>, [2, 3]>>,
Expect<Equal<Shift<['a', 'b', 'c', 'd']>, ['b', 'c', 'd']>>,
Expect<Equal<Unshift<[1, 2, 3], 4>, [4, 1, 2, 3]>>,
Expect<Equal<Unshift<['a', 'b', 'c', 'd'], 'e'>, ['e', 'a', 'b', 'c', 'd']>>,
]
from type-challenges-solutions.
@dvlden you mean the explanation is unclear? Please, ask follow-up questions and we try to improve the content.
from type-challenges-solutions.
Related Issues (20)
- type-challenges-solutions/en/medium-merge HOT 5
- easy-includes HOT 3
- type-challenges-solutions/en/medium-return-type HOT 4
- type-challenges-solutions/en/medium-zip HOT 3
- type-challenges-solutions/en/medium-trim HOT 3
- type-challenges-solutions/en/medium-length-of-string HOT 1
- type-challenges-solutions/en/medium-objectentries HOT 4
- type-challenges-solutions/en/medium-nomiwase HOT 1
- type-challenges-solutions/en/medium-unique HOT 1
- type-challenges-solutions/en/hard-camelcase HOT 1
- type-challenges-solutions/en/medium-flatten HOT 4
- type-challenges-solutions/en/easy-if HOT 7
- type-challenges-solutions/en/easy-parameters HOT 3
- type-challenges-solutions/en/medium-percentage-parser HOT 2
- type-challenges-solutions/en/medium-without HOT 1
- type-challenges-solutions/en/medium-partialbykeys HOT 1
- type-challenges-solutions/en/medium-shift HOT 1
- type-challenges-solutions/en/medium-replace HOT 1
- type-challenges-solutions/zh/easy-awaited HOT 1
- type-challenges-solutions/en/medium-number-range HOT 1
Recommend Projects
-
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
-
Vue.js
🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
-
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
-
TensorFlow
An Open Source Machine Learning Framework for Everyone
-
Django
The Web framework for perfectionists with deadlines.
-
Laravel
A PHP framework for web artisans
-
D3
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
-
Recommend Topics
-
javascript
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
-
web
Some thing interesting about web. New door for the world.
-
server
A server is a program made to process requests and deliver data to clients.
-
Machine learning
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
-
Visualization
Some thing interesting about visualization, use data art
-
Game
Some thing interesting about game, make everyone happy.
Recommend Org
-
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
-
Microsoft
Open source projects and samples from Microsoft.
-
Google
Google ❤️ Open Source for everyone.
-
Alibaba
Alibaba Open Source for everyone
-
D3
Data-Driven Documents codes.
-
Tencent
China tencent open source team.
from type-challenges-solutions.