Jaco Greeff
b5c5734c7c
* Initial split of util & util-crypto * Add initial XXHash version * Blake2s wit tests & documentation * Add sha512 (from NaCl) * Add randomBytes (from NaCl) * Flow fixes * Update documentation * Update latest @polkadot/dev
66 lines
1.4 KiB
Markdown
66 lines
1.4 KiB
Markdown
# number
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Utility methods to convert to and from `number` values
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- [numberFromBuffer](#numberfrombuffer) Creates a Number value from a Buffer object.
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- [numberFromHex](#numberfromhex) Creates a Number value from a Buffer object.
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- [numberToBuffer](#numbertobuffer) Creates a Buffer object from a number.
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- [numberToHex](#numbertohex) Creates a hex value from a number.
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## numberFromBuffer
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Creates a Number value from a Buffer object. [(alias of bufferToNumber)](buffer.md#buffertonumber)
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```js
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numberFromBuffer (value?: Buffer): number
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```
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## numberFromHex
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Creates a Number value from a Buffer object. [(alias of hexToNumber)](hex.md#hextonumber)
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```js
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numberFromHex (value?: Hex): number
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```
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## numberToBuffer
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Creates a Buffer object from a number.
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```js
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numberToBuffer (value?: number): Buffer
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```
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`null`/`undefined`/`NaN` inputs returns an empty `Buffer` result. `number` input values return the actual bytes value converted to a `Buffer`.
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```js
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import { numberToBuffer } from '@polkadot/util';
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const buffer = numberToBuffer(0x1234); // => Buffer.from([0x12, 0x34])
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```
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## numberToHex
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Creates a hex value from a number.
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```js
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numberToHex (value?: number): string
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```
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`null`/`undefined`/`NaN` inputs returns an empty `0x` result. `number` input values return the actual bytes value converted to a `hex`.
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```js
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import { numberToHex } from '@polkadot/util';
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const hex = numberToHex(0x1234); // => '0x1234'
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``` |