String Fu

String manipulation and conversion functions including for working with bytes/hex strings.

Warning: This sofware is under construction and in pre-alpha state.

Example usage

import { reverseBytes } from 'stringfu';

console.log(reverseBytes('0FAB03')); // 03AB0F

API

Table of Contents

• leftPad
  • Parameters
• rightPad
  • Parameters
• toBytes
  • Parameters
• fromBytes
  • Parameters
• reverseBytes
  • Parameters
• containsOnly
  • Parameters
• isInteger
  • Parameters
• splitWidth
  • Parameters
• isWhitespace
  • Parameters
• isAlphaNumeric
  • Parameters

leftPad

Takes a string and makes it length, left-padded with padChar

Parameters

• str string
• length number
• padChar string

rightPad

Takes a string and makes it length, right-padded with spaces

Parameters

• str string
• length number

toBytes

Takes a hex string and returns Uint8Array of bytes

Parameters

• str string

fromBytes

Takes an array of bytes and returns them as a string

Parameters

• bytes Uint8Array

reverseBytes

Takes a string of hexadecimal and returns a string with the bytes reversed

Parameters

• str string

containsOnly

Returns true if string only contains nominated chars

Parameters

• str string String to check
• chars string Chars to test with

isInteger

Returns true if string represents an integer number

Parameters

• str string String to check

splitWidth

Return a string as an array split at lineWidth chars

Parameters

• str string String to check
• lineWidth number Make lines this width

Returns Array<string> Array of strings

isWhitespace

Checks if string contains only whitespace characters

Parameters

• str string String to check

Returns boolean True/false

isAlphaNumeric

Checks if string contains only alphanumeric characters

Parameters

• str string String to check

Returns boolean True if only alphanumeric