Why does typeof array with objects return “object” and not “array”? [duplicate]

by

One of the weird behaviour and spec in Javascript is the typeof Array is Object.

You can check if the variable is an array in couple of ways:

var isArr = data instanceof Array;
var isArr = Array.isArray(data);

But the most reliable way is:

isArr = Object.prototype.toString.call(data) == '[object Array]';

Since you tagged your question with jQuery, you can use jQuery isArray function:

var isArr = $.isArray(data);

More Related Contents:

  1. Converting a JS object to an array using jQuery
  2. Remove array element based on object property
  3. How to add an object to an array
  4. Filter array of objects with another array of objects
  5. Find and remove objects in an array based on a key value in JavaScript
  6. Using jQuery to compare two arrays of Javascript objects
  7. break array of objects into separate arrays based on a property
  8. Find object having maximum value for the `id` property in an array of objects
  9. Creating a JavaScript global array with static elements?
  10. How to get the difference between two arrays of objects in JavaScript
  11. Convert array to JSON
  12. Why can I add named properties to an array as if it were an object?
  13. JavaScript: filter() for Objects
  14. How to get a number of random elements from an array?
  15. Get the index of the object inside an array, matching a condition
  16. Sort mixed alpha/numeric array
  17. Merge multiple objects inside the same array into one object [duplicate]
  18. Generate unique number within range (0 – X), keeping a history to prevent duplicates
  19. Array Like Objects in Javascript
  20. Perform .join on value in array of objects
  21. Create a reset of javascript Array prototype when Array.prototype has been modified?
  22. Deep comparison of objects/arrays [duplicate]
  23. Group by, and sum, and generate an object for each array in JavaScript
  24. How can I convert a jQuery object to an Element?
  25. How to get an Array with jQuery, multiple with the same name
  26. Best way to flatten JS object (keys and values) to a single depth array
  27. Using jQuery inArray with array of JavaScript Objects
  28. Create a dynamic nested object from array of properties
  29. Converting Array of Objects into Array of Arrays
  30. Difference between ( for… in ) and ( for… of ) statements?

Leave a Comment