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 @matiaswengiel/lotide

Require it:

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

Call it:

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

Documentation

The following functions are currently implemented:

• assertArraysEqual(arrayOne, arrayTwo): Takes in two arrays and logs to the console whether they contain identical values at each index.
• assertEqual(actual, expected): Takes in any two primitive data types except symbol and bigint and logs to the console whether they are identical to each other.
• assertObjectsEqual(objectOne, objectTwo): takes in two objects and logs to the console whether they have identical key-value pairs.
• countLetters(string): Takes in a string and returns an object with each letter in the string and the number of occurrences of each.
• countOnly(allItems, itemsToCount): Takes in an array (allItems) of values and counts the number of occurrences of one or more values as determined in an object (itemsToCount). Returns an object with the count(s).
• eqArrays(arrayOne, arrayTwo): Takes in two arrays and compares them to see if they are equal. Returns true or false.
• eqObjects(object1, object2): Takes in two objects and compares them to see if they have the same key-value pairs. Returns true or false.
• findKey: Takes in an object and a callback function and returns the first key whose value matches the parameters of the callback function.
• findKeyByValue(object, value): Takes in an object and a value from a key-value pair, and returns its corresponding key.
• flatten(array): Takes in an array containing other arrays within it, and combines them into a single array.
• head(array): Takes in an array and returns the value stored at index 0.
• letterPositions(sentence): Takes in a string and returns an object with the indexes of where each letter in the string can be found.
• map(array, callback): Takes in an array and performs a callback function on each index, then returns a new array with the results.
• middle(array): Takes in an array and returns the value(s) at the mid-point of the array. Will return one value for arrays that have an odd .length property, and two for arrays that have an even .length property.
• tails(array): Takes in an array, removes the value at index zero and returns the new array containing all other values with their indexes shifted by one.
• takeUntil(array, callback): Takes in an array and pushes the value of each index to a new array until it the callback function returns true, then returns the new array
• without(source, itemsToRemove): Takes in a source array and and array with items to remove from the source, and returns a third array that contains all of the items that were not removed from the first.