@aliyasser20/lotide v1.0.1

Lotide

A mini clone of the Lodash library.

Purpose

BEWARE: This library was published for learning purposes. It is not intended for use in production-grade software.

This project was created and published by me as part of my learnings at Lighthouse Labs.

Usage

Install it:

npm install @aliyasser20/lotide

Require it:

const _ = require('@aliyasser20/lotide');

Call it:

const results = _.tail([1, 2, 3]) // => [2, 3]

Documentation

The following functions are currently implemented:

• head([a, b, c, ...]): Returns the first element of an array.
• tail([a, b, c, ...]): Returns an array of all elements expect for first.
• middle([a, b, c, ...]): Returns the middle element/elements (single if array length is odd, double if array length is even). Returns empty array if array length is less than 3 elements.
• assertEqual(a, b): Returns true if a and b are equal, false otherwise.
• eqArrays([a, b, [c, d]], [a, b, [c, d]]): Returns true if two input arrays are equal, false otherwise.
• assertArraysEqual([a, b, [c, d]], [a, b, [c, d]]): Logs if two input arrays are equal or not to the console.
• eqObjects({a: ... , b: {...}}, {a: ... , b: {...}}): Returns true if two input objects are equal, false otherwise.
• assertObjectsEqual({a: ... , b: {...}}, {a: ... , b: {...}}): Logs if two input objects are equal or not to the console.
• countOnly([a, b, c, ...], {a: true, b: false, ...}): Returns an object with the number of instances of true properties of second argument in the first argument. Example - input: ([a, a, b, c], {a: true, c: true}) => output: {a: 2, b: 1}.
• countLetters("string"): Returns an object with the number of letters in a string. Example - input: "javascript" => output: {a: 2, c: 1, i: 1, j: 1, s: 1, p: 1, t: 1, v: 1, r: 1}
• takeUntil([a, b, c, ...], b): Returns a new array with the elements before the second argument is reached.
• without([a, b, c, ...], [a, b]): Returns a new array without the elements passed in the second array argument.
• findKey({a: b, c: d}, callback): Returns the first key of the property that has a value matching the callback input function. Callback must return true or false if matches or not.
• findKeyByValue({a: b, c: d}, b): Returns the key of the property which has a value matching the second input.
• letterPositions("string"): Returns an object with the the positions of each letter in a string. Example - input: ("javascript") => output: {j: [ 0 ], a: [ 1, 3 ], v: [ 2 ], s: [ 4 ], c: [ 5 ], r: [ 6 ], i: [ 7 ], p: [ 8 ], t: [ 9 ]}.
• flatten([a, b, [c, d]]): Returns a new array with all elements and sub-elements.
• map([a, b, c, ...], callback): Returns a new array with elements matching callback argument.