This project was created and published by SiningTong as part of my learnings at Lighthouse Labs.

Usage no npm install needed!

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  import siningtongLotide from 'https://cdn.skypack.dev/@siningtong/lotide';



A mini clone of the Lodash library.


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.


Install it:

npm install @siningtong/lotide

Require it:

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

Call it:

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


The following functions are currently implemented:

  • assertArraysEqual(arrayActual, arrayExpected): assert if Arrays are Equal
  • assertEqual(actual,expected): assert if items are Equal
  • assertObjectsEqual(actual, expected): assert Objects are Equal
  • countLetters(sentence): count letters' frequency
  • countOnly(allItems, itemsToCount): only count certain items
  • eqArrays(array1, array2): compare whether arrays are equal
  • eqObjects(object1, object2): compare whether objects are equal
  • findKey(object,callback): find key in an object
  • findKeyByValue(object,value): find certain Key By Value
  • flatten(arr): Given an array with other arrays inside, it can flatten it into a single-level array
  • letterPositions(sentence): return all the indices (zero-based positions) in the string where each character is found
  • head(array): retrieve the first element from the array
  • map(array, callback): The map function will return a new array based on the results of the callback function.
  • middle(arr): This function will take in an array and return the middle-most element(s) of the given array.
  • tail(num): This function returns the "tail" of an array: everything except for the first item (head) of the provided array.
  • takeUntil(array, callback): The function will return a "slice of the array with elements taken from the beginning."
  • without(source, itemsToRemove): This function will return a subset of a given array, removing unwanted elements.