Top 10 Lodash Functions in my Everyday Coding

Efficiency is crucial nowadays. We often face repetitive tasks and boilerplate code. Lodash, a JavaScript utility library, simplifies these tasks with a rich set of functions for arrays, objects, strings, and more.
Some top lodash functions that I use to streamline my daily coding routine, making my code cleaner and more efficient.

You can install lodash in your javascript project by using the below commands

npm install lodash

Let's dive into the lodash functions, and let's take an example data

const allUsers = [
  { id: 101, name: 'Shreya', profession: 'Teacher' },
  { id: 102, name: 'Neetu', profession: 'Athelete' },
  { id: 103, name: 'Vidhi', profession: 'Teacher' },
  { id: 104, name: 'Sheetal', profession: 'Doctor' },
  { id: 105, name: '', profession: 'Athelete' },
];Ï

const selectedUser = { id: 103, name: 'Vidhi' };

1. map

   returns a new array containing all users Id's

    map(allUsers, 'id');
    //[101, 102, 103, 104]
   

2. find

   find an element of the array which meets a specific condition

    find(allUsers, { id: selectedUser.id });
    // { id: 103, name: 'Vidhi', profession: 'Teacher' },
   

3. flattenDeep

   recursively flattens a nested array.

    const userIds = [101, 102, 103, 104,[105, [106, [107]]], [108, [109]]];
    flattenDeep(userIds);
    //[101, 102, 103, 104, 105, 106, 107, 108, 109]
   

4. groupBy

   groups array elements by the result of the iteratee function.

     groupBy(allUsers, (user) => user.profession);
    { 
        "Teacher" : [ { id: 101, name: 'Shreya', profession: 'Teacher' },
           { id: 103, name: 'Vidhi', profession: 'Teacher' }
         ],
        "Athelete":[{ id: 102, name: 'Neetu', profession: 'Athelete' },
            { id: 105, name: '', profession: 'Athelete' },    
        ],
        "Doctor":[{ id: 104, name: 'Sheetal', profession: 'Doctor' }]
     }
   

5. omit

   creates an object excluding the specified keys.

    omit(selectedUser, 'name')
    //{id: 103}
   

6. escape

   converts characters "&", "<", ">", '"', and "'" in the string to their corresponding HTML entities.

    escape('You are doing that & why');
    //You are doing that & why
   

7. get

   retrieves the value at the given path of an object.

    get(selectedUser, 'name')
    //Vidhi
   

8. isNil

   check if the value is null or undefined.

    isNil(null) //true
    isNil(undefined) //true
    isNil('') // false
   

9. some

   check if any element in the array meets the condition.

    some(allUser, 'name'); //true
    some(allUser, 'id'); //true
   

10. every

    check if every component of the array meets the condition.

    every(allUser, 'name'); //false
    every(allUser, 'id'); //true
    

Do let me know in the comments, which lodash functions make your day-to-day coding easier.

Happy Coding 👋