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 @jpenglabs/lotide

Require it:

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

Call it:

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

Documentation

The following functions are currently implemented:

• assertArraysEqual(array1, array2): console.logs messages about whether array1 and array 2 are equal
• assertEqual(primitive1, primitive2): console.logs messages about whether primitives are equal
• countLetters(string): counts how many of each letter are in a string, returns a summary object with keys as the letters and values as the count. Ignores spaces.
• countOnly(allItems, itemsToCount): allItems: an array of strings that we need to look through; itemsToCount: an object specifying what to count as its key and either true or false as its value
• eqArrays(array1, array2): returns true or false
• eqObjects(obj1, obj2): returns true or false
• findKey(object, callback): scan the object and return the first key for which the callback returns a truthy value. If no key is found, then it returns undefined
• findKeyByValue(object, target): returns first key in object that contains a target value
• flatten(array): flattens an array of arrays (recursively handles nested arrays)
• head(array): returns the first element
• letterPositions(sentence): returns object with letters as keys and array of indices where it appears in the sentence as values
• map(array, callback): replaces all elements in array by its value after the callback function
• middle(array): Returns middle element of array:
  • Blank array if given array of 0-2 elements
  • Single element if given odd number of elements
  • Middle two elements if given even number of elements
• tail(array): returns araay of all the elements after the first one
• takeUntil(array, callback): return a slice of the array with elements from the beginning to until the callback returns a truthy value
• without(sourceArray, itemsToRemoveArray): return a modified source array that doesn't contain elements that are in the itemsToRemove array