ziii

Chain function calls using a prototype function .z()

Very similar to zii but without polluting the Object prototype globally. This one allows you opt-in when should the z utility be applied on the target object, allowing you to right-compose functions together. This is like the proposed pipeline operator |>, but implemented in ES5.

z(value).z(first).z(second) is the same as second(first(value))

• 250 bytes small
• Works with functions, objects and arrays
• Works with RxJS 6+
• Works with Callbags
• Does not work with numbers and strings, unlike zii
• Supports TypeScript

Installation

npm install ziii

Usage

const z = require('ziii')

const result = z({age: 10})        // Call z() to wrap the input
  .z(({age}) => ({age: age * 3}))  // then .z() to continue the chain
  .z(({age}) => ({age: age / 4}))
  .z(({age}) => ({age: Math.ceil(age)}));

console.log(result) // {age: 8}

If you use TypeScript, then add this to your tsconfig.json file:

{
  ...
  "types": [
    "node_modules/ziii/index.d.ts"
  ]
  ...
}

Examples

RxJS

const z = require('ziii')
const {from} = require('rxjs')
const {map, filter} = require('rxjs/operators')

z(from([1, 2, 3, 4, 5]))
  .z(filter(x => x % 2 === 1))
  .z(map(x => x * 10))
  .subscribe({
    next: x => console.log(x)
  })

Callbags

const z = require('ziii')
const {fromIter, map, filter, forEach} = require('callbag-basics')

z(fromIter([1, 2, 3, 4, 5]))
  .z(filter(x => x % 2 === 1))
  .z(map(x => x * 10))
  .z(forEach(console.log))

License

MIT