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 @sarahrossy/lotide

Require it:

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

Call it:

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

Documentation

The following functions are currently implemented:

Assert Functions:

• assertEqual(actual, expected): Compares two values (numbers, strings, or Booleans) and asserts a message telling us if they are equal or not.
• assertArraysEqual(array1, array2): Compares two arrays and asserts a message telling us if they are equal or not.
• assertObjectsEqual(object1, object2): Compares two objects and asserts a message telling us if they are equal or not.

Counting Functions:

• countLetters(string): Counts the letters in a given string.
• countOnly(allItems, itemsToCount): Takes in an array of strings and an object of truthy values denoting the specific subset to count, and returns counts for the subset.

Equality Functions

• eqArrays(array1, array2): Takes in two arrays, returns true if they are equal and false if they are not.
• eqObjects(object1, object2): Takes in two objects, returns true if they are equal and false if they are not.

Search Functions

• findByKeyValue(object, value: Takes in an object and a value, scans the object and returns the first key which contains the given value.
• findKey(object, callback): Takes in an object and a callback, scans the object and returns the first key for which the callback returns a truthy value. Returns undefined if no key is found.

String Function

• letterPositions(sentence): Takes in a string and returns an object of the string's letters and their indexed poitions.

Array Functions

• head(array): Returns the first element of an array.
• tail(array): Removes the first element from an array and returns the resulting "tail".
• middle(array): Returns the middle element (or middle two elements) of an array.
• map(array, callback): Takes in an array to map and a callback function. Returns a new array based on the resuls of the callback function.
• takeUntil(array, callback): Takes in an array and a callback function and cuts the array when the callback function returns 'false'.
• without(source, itemsToRemove): Takes in an array and an array item(s) to remove. Removes these items from the array.