Clojure's string/upper_case in TypeScript

How to use

Install via yarn add locutus and import: import { upper_case } from 'locutus/clojure/string/upper_case'.

Or with CommonJS: const { upper_case } = require('locutus/clojure/string/upper_case')

Use a bundler that supports tree-shaking so you only ship the functions you actually use. Vite, webpack, Rollup, and Parcel all handle this. For server-side use this is less of a concern.

Examples

These examples are extracted from test cases that automatically verify our functions against their native counterparts.

#	code	expected result
1	upper_case('hello')	'HELLO'
2	upper_case('Hello World')	'HELLO WORLD'

Notes

• Clojure uses upper-case, JS uses upper_case

Here's what our current TypeScript equivalent to Clojure's string/upper_case looks like.

TSTypeScript JSJavaScript TSStandalone TS JSStandalone JS

Copy code

export function upper_case(s: string): string {
  //      discuss at: https://locutus.io/clojure/upper_case/
  // parity verified: Clojure 1.12
  //     original by: Kevin van Zonneveld (https://kvz.io)
  //          note 1: Clojure uses upper-case, JS uses upper_case
  //       example 1: upper_case('hello')
  //       returns 1: 'HELLO'
  //       example 2: upper_case('Hello World')
  //       returns 2: 'HELLO WORLD'

  return String(s).toUpperCase()
}

export function upper_case(s) {
  //      discuss at: https://locutus.io/clojure/upper_case/
  // parity verified: Clojure 1.12
  //     original by: Kevin van Zonneveld (https://kvz.io)
  //          note 1: Clojure uses upper-case, JS uses upper_case
  //       example 1: upper_case('hello')
  //       returns 1: 'HELLO'
  //       example 2: upper_case('Hello World')
  //       returns 2: 'HELLO WORLD'

  return String(s).toUpperCase()
}

Improve this function

Locutus is a community effort following The McDonald's Theory: we ship first iterations, hoping others will improve them. If you see something that could be better, we'd love your contribution.

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