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 @t.liu/lotide

Require it:

const _ = require('@t.liu/lotide');

Call it:

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

Documentation

The following functions are currently implemented:

• head(arr): Takes in a non-empty array and returns the first indice - otherwise returns undefined
• middle(arr): Takes an array and returns the middle of the array as an array items if the array if even and 1 if the array is odd - returns nothing if array length is less than or equal to 2
• tail(arr): Takes an array and returns an array with every indice except for the head (first index)
• map(arr, callback): Takes an array and a callback function, returning an array of the results of the callback function being called on each element in the array
• takeUntil(arr, callback): Takes an array and a callback - loops through the array and adds the indices to a return array until the callback function returns true, then terminates and returns every indice stored up until that point
• without(arr1, arr2): Takes two arrays and removes the values of the second array from the first array then returns the remaining contents of the first array
• letterPositions(sentence): Takes in an sentence and returns an object containing key value pairs representing the characters of the sentence and an array containing the indices of their locations
• flatten(arr): Takes an array and flattens it recursively - returns a non-nested array
• findKeyByValue(obj, value): Takes in an object and a value, returning the key of the first key value pair that contains value
• findKey(obj, callback): Takes in an object and a callback function, returning the key of the first key value pair that matches the callback function requirements
• eqObjects(obj1, obj2): Takes two objects and returns true if both objects have identical keys with identical values otherwise returns false
• eqArrays(arr1, arr2): Takes two arrays and returns true if both arrays have identical values in the same order otherwise returns false
• countOnly(arr, obj): Takes in an array of strings that we need to look through and an object specifying what to count and returns the indice of valid items - otherwise returns undefined for that key-pair
• countLetters(str): Takes a string and returns an object containing the characters of the string mapped to a value representing how often that character appeared in the string - skips whitespaces
• assertEqual(obj1, obj2): Compares two primitives/objects for strict equality - prints result to console with no return (DEPRECATED)
• assertObjectsEqual(obj1, obj2): Compares two objects for equality - prints result to console with no return (DEPRECATED)
• assertArraysEqual(arr1, arr2): Compares two arrays for equality - prints result to console with no return (DEPRECATED)