unch

Collection of fast and lightweight utilities for functional programing.

What's new?

🎉 Pipe and Compose Functions

Features

Providing a set of functions for functional programing with full imutability.

Goals

Quality - Thoroughly tested for reliable results
Minimal - Only depends on single third-party dependency
Simple - Minimal learning curve required
Fast - Optimized for speed
Compatibily - The code is compiled for both ES2017 and ES5

Installation

# NPM
npm install unch

# YARN
yarn add unch

How to use

// import all
import * as Unch from 'unch';

const originalArray = [1, 2, ['a', 'b', 'c']];

const clonedArray = Unch.cloneArray(originalArray);
// clonedArray == [1, 2, ['a', 'b', 'c']]

// import using tree shaking
import { cloneArray } from 'unch';

const originalArray = [1, 2, ['a', 'b', 'c']];

const clonedArray = cloneArray(originalArray);
// clonedArray == [1, 2, ['a', 'b', 'c']]

Contributing

I am open for contributions. If you're planning to contribute please make sure to read the contributing guide as it will make things much more organized: CONTRIBUTING.md

// Short Arrays (length: 40, strings and numbers)
Unch:   8,374,545 ops/sec ±1.26%
Lodash:   276,857 ops/sec ±0.26%
Ramda:     94,323 ops/sec ±1.51%

// Long Arrays (length: 10k, strings and numbers)
Unch:   40,533 ops/sec ±0.24%
Lodash:  1,294 ops/sec ±1.75%
Ramda:     420 ops/sec ±0.26%

// Complex Arrays (length: 10k, strings, numbers, arrays and objects)
Unch:   13.50 ops/sec ±4.96%
Lodash:  5.83 ops/sec ±1.00%
Ramda:   0.80 ops/sec ±0.56%

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`getFirst`

Return the first element of an array.

Params:

   arr: Array<T> // Initial Array

return: <T>      // First Element from Array

Use:

import { getFirst } from 'unch';

const originalArray = ['a', 'b', 'c'];
const firstElement = first(originalArray);
// firstElement == 'a'

Benchmarks:

// Arrays (length: 500, strings and numbers)
Unch:   193,645,584 ops/sec ±0.39%
Lodash:  15,619,036 ops/sec ±0.30%
Ramda:    2,683,393 ops/sec ±0.93%

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`getLast`

Return the last element of an array.

Params:

   arr: Array<T> // Initial Array

return: <T>      // Last Element from Array

Use:

import { getLast } from 'unch';

const originalArray = ['a', 'b', 'c'];
const lastElement = last(originalArray);
// lastElement == 'c'

Benchmarks:

// Arrays (length: 500, strings and numbers)
Unch:   176,999,379 ops/sec ±0.19%
Lodash:  15,602,697 ops/sec ±0.29%
Ramda:    2,619,757 ops/sec ±0.82%

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`push`

Push a new item to the end of an array.

Params:

   arr: Array<T>     // Initial Array
  item: <U>          // Item to insert

return: Array<T | U> // Updated Array

Use:

import { push } from 'unch';

const originalArray = ['a', 'b', 'c'];
const updatedArray = push(originalArray, 'd');
// updatedArray == ['a', 'b', 'c', 'd']

Benchmarks:

// Simple Arrays (length: 500, strings and numbers)
Unch:   417,260 ops/sec ±0.33%
Lodash: 219,018 ops/sec ±0.63%
Ramda:  769,436 ops/sec ±2.10%

// Complex Arrays (length: 500, strings, numbers, arrays and objects)
Unch:   2,234 ops/sec ±2.08%
Lodash:   261 ops/sec ±0.81%
Ramda:    202 ops/sec ±0.50%

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`unshift`

Push a new item to the start of an array.

Params:

   arr: Array<T>     // Initial Array
  item: <U>          // Item to insert

return: Array<T | U> // Updated Array

Use:

import { unshift } from 'unch';

const originalArray = ['a', 'b', 'c'];
const updatedArray = unshift(originalArray, 99);
// updatedArray == [99,'a', 'b', 'c']

Benchmarks:

// Simple Arrays (length: 500, strings and numbers)
Unch:   489,191 ops/sec ±0.25%
Lodash: 188,554 ops/sec ±0.31%
Ramda:  717,867 ops/sec ±2.02%

// Complex Arrays (length: 500, strings, numbers, arrays and objects)
Unch:   2,215 ops/sec ±0.26%
Lodash:   264 ops/sec ±0.37%
Ramda:    200 ops/sec ±1.12%

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`pop`

Extract the last item from the array and returns a Tuple with the first element being the item and the second being the remaining array.

Params:

   arr: Array<T>   // Initial Array

return: [
  [0]: <T>,        // Last Item of Array
  [1]: Array<T>    // Remaining Array
]

Use:

import { immutablePop } from 'unch';

const originalArray = ['a', 'b', 'c', 'd', 'e'];

const [lastItem, remainingArray] = immutablePop(originalArray);
// lastItem == ['e']
// remainingArray == ['a', 'b', 'c', 'd']

Benchmarks:

(no equivalents)

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`shift`

Extract the first item from the array and returns a Tuple with the first element being the item and the second being the remaining array.

Params:

   arr: Array<T>   // Initial Array

return: [
  [0]: <T>,        // First Item of Array
  [1]: Array<T>    // Remaining Array
]

Use:

import { shift } from 'unch';

const originalArray = ['a', 'b', 'c', 'd', 'e'];

const [firstItem, remainingArray] = shift(originalArray);
// firstItem == ['a']
// remainingArray == ['b', 'c', 'd', 'e']

Benchmarks:

(no equivalents)

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`sort`

Sorts the elements of an array. Works the same way as the Vanilla JS Sort but doesn't change the original array.

Params:

       arr: Array<T>                    // Initial Array
compareFn?: (a: any, b: any) => number  // Compare function (optional)

    return: Array<T>                    // Sorted Array

Use:

import { sort } from 'unch';

const originalArray = ['c', 'j', 'a', 'i', 'f'];
const sortedArray = sort(originalArray);
// sortedArray == ['a', 'c', 'f', 'i', 'j']

const numericArray = [45, 3, 17, 118, 42, 1000];
const sortedNumericArray = sort(numericArray, (a, b) => a - b);
// sortedNumericArray = [3, 17, 42, 45, 118, 1000]

Benchmarks:

// Simple Arrays (length: 500, strings and numbers)
Unch:    7,012 ops/sec ±0.51%
Lodash: 15,414 ops/sec ±0.38%
Ramda:   7,247 ops/sec ±0.22%

// Complex Arrays (length: 500, strings, numbers, arrays and objects)
Unch:  4,568 ops/sec ±2.54%
Ramda:   586 ops/sec ±0.23%

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`reverse`

Reverse the input array.

Params:

   arr: Array<T> // Initial Array

return: Array<T> // Reversed Array

Use:

import { reverse } from 'unch';

const originalArray = [1, 2, 3, 4, 5];
const reversedArray = reverse(originalArray);
// reversedArray == [5, 4, 3, 2, 1]

Benchmarks:

// Simple Arrays (length: 500, strings and numbers)
Unch:   540,601 ops/sec ±0.61%
Lodash:  28,195 ops/sec ±0.29%
Ramda:   30,548 ops/sec ±0.29%

// Complex Arrays (length: 500, strings, numbers, arrays and objects)
Unch:   1,222 ops/sec ±19.34%
Lodash:   259 ops/sec ±00.41%
Ramda:    214 ops/sec ±00.20%

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`compact`

Remove all top level falsey values of input Array.

Params:

   arr: Array<T> // Initial Array

return: Array<T> // Compacted Array

Use:

import { compact } from 'unch';

const originalArray = [0, 1, null, 'example', '', 3, undefined, 3, 4];
const reversedArray = reverse(originalArray);
// reversedArray == [1, 'example', 3, 3, 4]

Benchmarks:

// Simple Arrays (length: 500, strings and numbers)
Unch:   226,116 ops/sec ±0.69%
Lodash: 173,346 ops/sec ±0.49%
Ramda:  297,270 ops/sec ±1.69%

// Complex Arrays (length: 500, strings, numbers, arrays and objects)
Unch:   2,319 ops/sec ±1.68%
Lodash:   262 ops/sec ±0.40%
Ramda:    170 ops/sec ±0.28%

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`splice`

Changes the contents of an array by removing or replacing existing elements and/or adding new elements in place, same as Vanilla JS Splice but it returns a Tuple with the first element being the updated array and the second being the extracted array.

Params:

  arr: Array<T>          // Initial Array
  props: {
    start: number        // Index where update starts
    deleteCoumt?: number // Number of fields to delete (optional)
    items?: Array<U>     // Items to insert (optional)
  }

return: [
  [0]: Array<T | U>,     // Updated Array
  [1]: Array<T>[]        // Extracted Array
]

Use:

import { splice } from 'unch';

const originalArray = [1, 2, 3, 4, 5, 6, 7];

const [updatedArray, extractedArray] = splice(originalArray, {
  start: 2,
  deleteCount: 3,
  items: [88, 99]
});
// updatedArray == [1, 2, 88, 99, 6, 7]
// extractedArray == [3, 4, 5]

Benchmarks:

(no equivalents)

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`insert`

Insert Item in Array in an especific index;

Params:

  arr: Array<T>      // Initial Array
  props: {
    index: number,   // Index place new Item
    item: <U>        // Item to insert
  }

return: Array<T | U> // Updated Array

Use:

import { insert } from 'unch';

const originalArray = [1, 2, 3, 4];

const updatedArray = splice(originalArray, {
  index: 1,
  item: 'New Item'
});
// updatedArray == [1, 'New Item', 2, 3, 4]

Benchmarks:

// Simple Arrays (length: 500, strings and numbers)
Unch:   421,675 ops/sec ±0.47%
Lodash: 161,942 ops/sec ±0.56%
Ramda:  718,233 ops/sec ±1.92%

// Complex Arrays (length: 500, strings, numbers, arrays and objects)
Unch:   2,295 ops/sec ±2.49%
Lodash:   259 ops/sec ±0.71%
Ramda:    208 ops/sec ±0.50%

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Object Functions

`cloneObject`

Deep clone the input Object.

Params:

   obj: <T> // Initial Object

return: <T> // Cloned Object

Use:

import { cloneObject } from 'unch';

const originalObject = {
  name: 'John Doe',
  age: 29,
  job: 'Developer',
};
const clonedObject = cloneObject(originalObject);

// Expect:
clonedObject == {
  name: 'John Doe',
  age: 29,
  job: 'Developer',
};

Benchmarks:

Unch:   159,130 ops/sec ±0.27%
Lodash:  33,683 ops/sec ±1.11%
Ramda:   21,111 ops/sec ±0.96%

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`assignObj`

Assign new fields to an Object.

Params:

           obj:  <T> // Initial Object
fieldsToAssign:  <U> // New Fields

        return:  <T> // Updated Object

Use:

import { assignObj } from 'unch';

const originalObject = {
  name: 'John Doe',
  age: 29,
  job: 'Developer',
};

const updatedObject = assignObj(originalObject, {
  isAwesome: true,
  favouriteFood: 'sushi',
});

// Expect:
updatedObject == {
  name: 'John Doe',
  age: 29,
  job: 'Developer',
  isAwesome: true,
  favouriteFood: 'sushi',
};

Benchmarks:

Unch:   148,622 ops/sec ±0.26%
Lodash:  33,692 ops/sec ±0.39%

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`updateObj`

Assign new fields to an Object.

Params:

           obj: <T> // Initial Object
fieldsToUpdate: <U> // Fields to Update

        return: <T> // Updated Object

Use:

import { updateObj } from 'unch';

const originalObject = {
  name: 'John Doe',
  age: 29,
  job: 'Developer',
};

const updatedObject = updateObj(originalObject, {
  age: 85,
  job: 'Samurai',
});

// Expect:
updatedObject ==
  {
    name: 'John Doe',
    age: 85,
    job: 'Samurai',
  };

Benchmarks:

Unch:   150,946 ops/sec ±0.24%
Lodash:  20,931 ops/sec ±0.40%
Ramda:   33,662 ops/sec ±0.45%

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`filterObjKeys`

Filter keys from an Object.

Params:

       obj: <T>           // Initial Object
filterKeys: Array<string> // Keys to filter

    return: <T>           // Filtered Object

Use:

import { updateObj } from 'unch';

const originalObject = {
  name: 'John Doe',
  age: 29,
  job: 'Developer',
  isAwesome: true,
  favouriteFood: 'sushi',
};

const filteredObject = filterObjKeys(originalObject, ['name', 'age']);

// Expect:
filteredObject == {
  name: 'John Doe',
  age: 29,
};

Benchmarks:

(no equivalents)

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`deleteObjKeys`

Remove keys from an Object.

Params:

       obj: <T>           // Initial Object
removeKeys: Array<string> // Keys to remove

    return: <T>           // Updated Object

Use:

import { updateObj } from 'unch';

const originalObject = {
  name: 'John Doe',
  age: 29,
  job: 'Developer',
  isAwesome: true,
  favouriteFood: 'sushi',
};

const updatedObject = deleteObjKeys(originalObject, ['name', 'age']);

// Expect:
updatedObject == {
  job: 'Developer',
  isAwesome: true,
  favouriteFood: 'sushi',
};

Benchmarks:

//Benchmarks (no equivalents)

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`pipe`

Create Pipe function.

Use:

import { pipe } from 'unch';

const add = (a: number) => (b: number) => b + a;
const multiplyBy = (a: number) => (b: number) => b * a;
const parseResult = (a: number) => `Result: ${a}`;

const myPipe = pipe
  .f(add(2))
  .f(multiplyBy(4))
  .f(parseResult)
  .build();

const result = myPipe(5);

// Expect:
result == 'Result: 28';

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`compose`

Create Compose function.

Use:

import { compose } from 'unch';

const add = (a: number) => (b: number) => b + a;
const multiplyBy = (a: number) => (b: number) => b * a;
const parseResult = (a: number) => `Result: ${a}`;

const myCompose = compose
  .f(parseResult)
  .f(multiplyBy(4))
  .f(add(5))
  .build();

const result = myCompose(5);

// Expect:
result == 'Result: 40';

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License

MIT License

Made with ♥ by Victor Alvarenga 👋 Get in touch!

Name		Name	Last commit message	Last commit date
Latest commit History 56 Commits
src		src
.editorconfig		.editorconfig
.eslintignore		.eslintignore
.eslintrc.json		.eslintrc.json
.gitignore		.gitignore
.npmignore		.npmignore
CONTRIBUTING.md		CONTRIBUTING.md
LICENSE		LICENSE
README.MD		README.MD
jest.config.js		jest.config.js
package.json		package.json
prettier.config.js		prettier.config.js
tsconfig-es5.json		tsconfig-es5.json
tsconfig.json		tsconfig.json
yarn.lock		yarn.lock

License

thadeucity/unch

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unch

What's new?

Features

Goals

Installation

How to use

Contributing

Table of Contents

Array Functions

Object Functions

General Functions

Array Functions

cloneArray

getFirst

getLast

push

unshift

pop

shift

sort

reverse

compact

splice

insert

Object Functions

cloneObject

assignObj

updateObj

filterObjKeys

deleteObjKeys

pipe

compose

License

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`cloneArray`

`getFirst`

`getLast`

`push`

`unshift`

`pop`

`shift`

`sort`

`reverse`

`compact`

`splice`

`insert`

`cloneObject`

`assignObj`

`updateObj`

`filterObjKeys`

`deleteObjKeys`

`pipe`

`compose`

Packages