@tomfream/lotide v1.0.0

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 @tomfream/lotide

Require it:

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

Call it:

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

Documentation

The following functions are currently implemented:

• head(arr): Take in a single array as an argument, and returns it's head (first) element.
• tail(arr): Take in a single array as an argument, and returns it's tail (without first element) elements.
• middle(arr): Take in a single array as an argument, and returns the single middle element if the array is an odd length, and the middle two elements if the array is even length.
• countLetter(str): Take in a sentence (as a string) and then return a count of each of the letters in that sentence.
• countOnly(arr, obj): Given an array and an object. It will return an object containing counts of everything that the input object listed.
• findKey(obj, cb): Takes in an object and a callback. Scans the object and returns the first key for which the callback returns a truthy value. If no key is found, then it returns undefined.
• findKeyByValue(obj, value): takes in an object and a value. Scans the object and returns the first key which contains the given value. If no key with that given value is found, then it returns undefined.
• flatten(arr): Given an array with other arrays inside, flatten it into a single-level array.
• letterPositions(str): Takes in a string and returns all the indices (zero-based positions) in the string where each character is found.
• map(arr, cb): Takes in an arrayy to map and a callback function. Will return a new array based on the results of the callback function.
• takeUntil: Takes in an array and a callback function. Returns a slice of the array with elements taken from the beginning until the callback returns a truthy value.
• without(source, itemsToRemove): Takes in a source array and a itemsToRemove array. Returns a new array with only those elements from source that are not present in the itemsToRemove array.