@bryancn/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 @bryancn/lotide

Require it:

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

Call it:

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

Documentation

The following functions are currently implemented:

• head(array): returns the first element from the array.
• tail(array): returns every element except the head (first element) of the array.
• middle(array): returns an array with only the middle element(s) of the provided array.
• assertArraysEqual(array1, array2): console.logs if two arrays are equal or not.
• assertEqual(actual, expected): Compares two primitve values and console.logs if actual is '===' expected.
• eqArrays(array1, array2):compares two arrays and returns true if they are equal else. returns false.
• takeUntil(array, callback): takes an array and a callback function. Parses through array until the callback function returns a 'truthy' value. Function returns a slice of the array with elements taken from the beginning up to (but not including) value that returned truthy in callback.
• without(sourceArray, itemsToRemove):takes in a source array and an itemsToRemove array. Returns a new array with only those elements from source that are not present in the itemsToRemove array.
• findKey(obj, callback): Takes in an object and a callback function. 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. Returns the first key which contains the given value ELSE If no key with that given value is found, then returns undefined.
• letterPositions(string): Returns all the indices (zero-based positions) in the string where each character is found.
• map(array, callback): Takes an array and a callback function. Returns new array with callback function applied to each element from original array.
• eqObjects(obj1, obj2): Takes in two objects and returns true if they are equal and false otherwise.
• assertObjectsEqual(actual, expected): Compare two objects and console.logs if actual is '===' expected.
• countLetters(string): Takes in a string and then returns a count of each of the letters in that string.
• countOnly(allItems, itemsToCount): Takes in a collection of items (allItems) and return counts for a specific subset (itemsToCount) of those items.