TypeScript MultiTool 🛠

On the journey of building applications in TypeScript you will need a menagerie of functions. Typically the user's trip down Google lane will bring you to StackOverflow. The code is copied into the editor and the app construction continues. Bad, no chance the testing is added and now problems arise. The TypeScript MultiTool is a tree-shakable pile of functions helpful for building apps with all of the tests included in the library.

Motivation

Building software accurately and quickly tends to yield solutions which are simply missing test coverage for quick and dirty functions plucked from google searches or StackOverflow. This library is my own collection of functions I am using with the included test coverages to manage them.

Furthering, in my experience, I find great solutions and I'll adopt them in a project. Months down the road I'll research the same problem and will stop and realize in the middle of the research "I have looked for this before" and I'll search my own solutions for it. I have done a poor job denoting great known-good solutions. This is an attempt to encapsulate the runtime from time spent researching.

Installation

The recommended way to install is through npm or Yarn. The library is exposed as CommonJS and ESM.

npm:

npm install ts-multitool

yarn:

yarn add ts-multitool

Usage

The entire point of ts-multitool is simplicity with the goal of producing rapid test-able solutions in TypeScript

Functions

Text Functions (available at /text/)

commaSeparatedString(string[],useOxfordComma)

Take a list of strings and create a comma separated string. The useOxfordComma will place an Oxford Comma

import { commaSeparatedString } from 'ts-multitool'
const response = commaSeparatedString(['first', 'second', 'third'])
assert(response === 'first, second and third')

capitalize(string)

Capitalizes the first letter of a string. It does NOT force lowercase on the remaining letters.

import { capitalize } from 'ts-multitool'
const response = capitalize('thomas')
assert(response === 'Thomas')

truncate(string,length,useWordBoundary,ellipsis)

Truncates the string at the given length and adds an ellipsis. The useWordBoundary will truncate at the nearest word boundary. The ellipsis will be added to the end of the string.

import { truncate } from 'ts-multitool'
const line1 = truncate('The quick brown fox jumps over the lazy dog', 20, true, '...')
const line2 = truncate('The quick brown fox jumps over the lazy dog', 20)
assert(line1 === 'The quick brown fox...')
assert(line2 === 'The quick brown fox…')

Array Functions (available at /array/)

unique<T>(T[])

Returns a list of unique values from the given array (supports primitives)

import { unique } from 'ts-multitool'
const list = unique([1, 2, 3, 4, 3, 2, 4, 1])
// returns [1, 2, 3, 4]

uniqueValue(value:string, list:string[]): string

Determines and possibly mutates value to ensure it is unique in the list of values

import { uniqueValue } from 'ts-multitool'
const field1 = uniqueValue('a', ['a', 'b', 'c'])
// returns 'a0'
const field2 = uniqueValue('a', ['a', 'a0', 'a1'])
// returns 'a2'

File Functions (available at /files/)

getExtension(string)

Get the extension of a file.

import { getExtension } from 'ts-multitool'
const ext = getExtension('somefile.that.you.need.jpg')
assert(response === 'jpg')

Have something to add (or something is busted)?

Something to add to the library? Cool, add it and create a PR! If there is something busted in the library? Whoops, file an issue!

Tests

Tests are executed via Jest.

npm run test