@dasitby/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 @dasitby/lotide

Require it:

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

Call it:

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

Documentation

The following functions are currently implemented:

• head(arr): returns the first element of an array.
• tail(arr): returns the final element of an array.
• middle(arr): returns the centre element(s) of an array (1 element if length is odd, 2 elements if length is even).
• map(arr, cb): applies a callback function to each element of an array, and returns a new array with the results.
• flatten(arr): removes any nesting within an array of arrays and returns a new array with the items in the order they appear in the original array.
• takeUntil(arr, cb): pushes all elements in an array to a new array until an element returns false on a callback.
• without(arr, itemsToRemove): given an array and another array, removes any items present in the second array from the first, and returns the resulting array.
• findKey(obj, cb): returns a key if a callback involving testing its value returns true.
• findKeyByValue(obj, value): returns the key corresponding to the given value in the given object.
• eqArrays(arr1, arr2): compares two arrays and returns true if they are identical.
• eqObjects(obj1, obj2): compares two objects and returns true if they are identical.
• countOnly(arr, itemsToCount): given two arrays it returns the number of times the items in the second array appear in the first
• countLetters(string): returns an object containing the number of each letter in the input string, excluding spaces.
• letterPositions(string): returns an object containing arrays of the index of each occurrence of each letter in the input string, excluding spaces.