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140 lines
3.2 KiB
Markdown
140 lines
3.2 KiB
Markdown
# is-decimal
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[![Build][build-badge]][build]
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[![Coverage][coverage-badge]][coverage]
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[![Downloads][downloads-badge]][downloads]
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[![Size][size-badge]][size]
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Check if a character is a decimal.
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## Contents
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* [What is this?](#what-is-this)
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* [When should I use this?](#when-should-i-use-this)
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* [Install](#install)
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* [Use](#use)
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* [API](#api)
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* [`isDecimal(character|code)`](#isdecimalcharactercode)
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* [Types](#types)
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* [Compatibility](#compatibility)
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* [Security](#security)
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* [Related](#related)
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* [Contribute](#contribute)
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* [License](#license)
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## What is this?
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This is a function that checks if a given character is an ASCII decimal.
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## When should I use this?
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Not often, as it’s relatively simple to do yourself.
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This package exists because it’s needed in several related packages, at which
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point it becomes useful to defer to one shared function.
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## Install
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This package is [ESM only][esm].
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In Node.js (version 12.20+, 14.14+, or 16.0+), install with [npm][]:
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```sh
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npm install is-decimal
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```
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In Deno with [Skypack][]:
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```js
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import {isDecimal} from 'https://cdn.skypack.dev/is-decimal@2?dts'
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```
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In browsers with [Skypack][]:
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```html
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<script type="module">
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import {isDecimal} from 'https://cdn.skypack.dev/is-decimal@2?min'
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</script>
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```
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## Use
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```js
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import {isDecimal} from 'is-decimal'
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isDecimal('0') // => true
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isDecimal('9') // => true
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isDecimal('a') // => false
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isDecimal('💩') // => false
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```
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## API
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This package exports the following identifiers: `isDecimal`.
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There is no default export.
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### `isDecimal(character|code)`
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Check whether the given character code (`number`), or the character code at the
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first position (`string`), is decimal.
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## Types
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This package is fully typed with [TypeScript][].
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## Compatibility
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This package is at least compatible with all maintained versions of Node.js.
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As of now, that is Node.js 12.20+, 14.14+, and 16.0+.
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It also works in Deno and modern browsers.
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## Security
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This package is safe.
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## Related
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* [`wooorm/is-alphabetical`](https://github.com/wooorm/is-alphabetical)
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* [`wooorm/is-hexadecimal`](https://github.com/wooorm/is-hexadecimal)
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* [`wooorm/is-whitespace-character`](https://github.com/wooorm/is-whitespace-character)
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* [`wooorm/is-word-character`](https://github.com/wooorm/is-word-character)
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## Contribute
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Yes please!
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See [How to Contribute to Open Source][contribute].
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## License
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[MIT][license] © [Titus Wormer][author]
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<!-- Definitions -->
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[build-badge]: https://github.com/wooorm/is-decimal/workflows/main/badge.svg
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[build]: https://github.com/wooorm/is-decimal/actions
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[coverage-badge]: https://img.shields.io/codecov/c/github/wooorm/is-decimal.svg
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[coverage]: https://codecov.io/github/wooorm/is-decimal
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[downloads-badge]: https://img.shields.io/npm/dm/is-decimal.svg
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[downloads]: https://www.npmjs.com/package/is-decimal
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[size-badge]: https://img.shields.io/bundlephobia/minzip/is-decimal.svg
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[size]: https://bundlephobia.com/result?p=is-decimal
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[npm]: https://docs.npmjs.com/cli/install
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[skypack]: https://www.skypack.dev
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[license]: license
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[author]: https://wooorm.com
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[esm]: https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c
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[typescript]: https://www.typescriptlang.org
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[contribute]: https://opensource.guide/how-to-contribute/
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