@andrewbradt/lotide v1.0.1

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 @andrewbradt/lotide

Require it:

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

Call it:

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

Documentation

The following functions are currently implemented:

• countLetters(string): Converts the string argument to lowercase and returns an object containing key/value pairs of unique occurring characters and number of occurrences.
• head(array): Returns the first element of an array.
• middle(array): Returns a new array containing the middle element(s). If the array contains an even number of elements, two elements are returned.
• tail(array): Returns a new array without the first element of the array passed as an argument.
• countOnly(allItems, itemsToCount) : Returns a new object with properties for each item in the array allItems and corresponding property with a truthy value in itemsToCount. The value of each property will be the number of occurrences a given key appears in allItems.
• eqArrays(array1, array2) : Compares two one-dimensional arrays for strict equality and returns a boolean value.
• eqObjects(object1, object2) : Recursively compares two objects for strict equality and returns a boolean value. Nested array comparison TBD.
• findKey(object, callback) : Iterates over the object providing a property's value as the argument to the provided callback. Returns the key of the first value which caused the callback to return a truthy value.
• findKeyByValue(object, matchingVal) : Iterates over the provided object and returns the first key whose value strictly matches matchingVal.
• flatten(array) : Creates a one-dimensional copy of the input array. Currently supports two-dimensional arrays.
• letterPositions(string) : Converts the string argument to lowercase and returns an object containing key/value pairs of unique occurring characters and an array of indices at which they occur.
• map(array, callback) : Iterates over the array and uses the current element as an argument to the provided callback function. Returns a new array where each element is the return value of the callback.
• takeUntil(array, callback) : Iterates over the array invoking the callback for each element in the uppermost level of the array until the callback function returns a truthy value. When the callback returns a falsey value, the current element is pushed into a new array. Returns a subset of the array passed into the function.
• without(source, itemsToRemove) : Returns a new array which contains elements from the source array which do not appear in the itemsToRemove array. Currently supports one or two-dimensional arrays.