Difference Between indexOf and findIndex function of array

by

The main difference are the parameters of these functions:

  • Array.prototype.indexOf() expects a value as first parameter. This makes it a good choice to find the index in arrays of primitive types (like string, number, or boolean).

  • Array.prototype.findIndex() expects a callback as first parameter. Use this if you need the index in arrays with non-primitive types (e.g. objects) or your find condition is more complex than just a value.

See the links for examples of both cases.

More Related Contents:

  1. Custom/Modified 'Fibonacci' Number sequence
  2. Equivalent of and in JavaScript?
  3. jQuery .animate function not responding properly
  4. Javascript change div color on click once for each
  5. Why the timer setTimeout returns the first value “2”
  6. What does a comma do in JavaScript expressions?
  7. Get all non-unique values (i.e.: duplicate/more than one occurrence) in an array
  8. HTML5 form required attribute. Set custom validation message?
  9. What’s the difference between window.location and document.location in JavaScript?
  10. Javascript – get array of dates between 2 dates
  11. Why can I use a function before it’s defined in JavaScript?
  12. Move the mouse pointer to a specific position?
  13. Difference between (function(){})(); and function(){}(); [duplicate]
  14. How To Wrap / Surround Highlighted Text With An Element
  15. iterating through object
  16. Is there a mechanism to loop x times in ES6 (ECMAScript 6) without mutable variables?
  17. How can I execute a function on pressing the enter key in an field?
  18. Get the visible height of a div with jQuery
  19. Why element.style always return empty in JS?
  20. Count the number of integers in a string
  21. Is JSON.stringify() supported by IE 8?
  22. Merge Array of Objects by Property using Lodash
  23. Replace string in javascript array
  24. JSON.stringify output to div in pretty print way
  25. pack / unpack functions for node.js [closed]
  26. Remove JSON element
  27. Country boundries using Google Map API v3
  28. Updating a JSON object using Javascript
  29. Web Audio API, get the output from the soundcard
  30. How to programmatically fill input elements built with React?

Leave a Comment