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 @gacquroff/lotide

Require it:

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

Call it:

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

Documentation

The following functions are currently implemented:

• head(array): Return the first element of array
• tail(array): Return array without the first element
• middle(array): Returns an array containing the middle element of array if array.length is odd. Otherwise returns an array containing the middle two elements.
• assertArraysEqual(arr1, arr2): Check if two arrays are equal. Does not work on objects nested inside the array. Prints equality message to the console.
• assertEqual(value1, value2): Check if two primitive values are equal. Prints equality message to the console.
• assertObjectsEqual(obj1, obj2): Check if two objects are equal. Works with nested objects, but does not work with objects nested inside arrays inside the parent objects.
• countLetter(string): Returns an object containing the counts of each letter in string.
• countOnly(allItems, itemsToCount): Returns an object containing the counts of each item in itemsToCount that appears in allItems.
• eqArrays(arr1, arr2): Returns true if arr1 is equal to arr2. Returns false otherwise. Works with nested arrays.
• eqObjects(obj1, obj2): Returns true if obj1 is equal to obj2. Returns false otherwise. Works with nested objects, but does not work with objects nested inside arrays inside the parent objects.
• findKey(obj, callback): Returns the key of the first property in obj that causes callback to return true.
• findKeyByValue(obj, value): Returns the key of the first property in obj that has the value value.
• flatten(array): Returns an array of depth = 1 containing all elements in array.
• joinList(array): Returns a string containing all elements of array concatenated together with ,.
• letterPositions(string): Returns an object where each property has key of letter in string and value of an array containing all zero-indexed positions that letter appears in string.
• map(array, callback): Returns an array that contains each element of array transformed by applying acallback function.
• min(numbers): Returns the smallest number in an array of numbers.
• takeUntil(array, callback): Returns a deep copy of array up until acallback function applied to an array element returns true.
• without(array, itemsToExclude): Returns a shallow copy of array with all items present in itemsToExclude excluded.