how to break the _.each function in underscore.js

by

You can’t break from the each method—it emulates the native forEach method’s behavior, and the native forEach doesn’t provide to escape the loop (other than throwing an exception).

However, all hope is not lost! You can use the Array.every method. 🙂

From that link:

every executes the provided callback function once for each element present in the array until it finds one where callback returns a false value. If such an element is found, the every method immediately returns false.

In other words, you could do something convoluted like this (link to JSFiddle):

[1, 2, 3, 4].every(function(n) {
    alert(n);
    return n !== 3;
});

This will alert 1 through 3, and then “break” out of the loop.

You’re using underscore.js, so you’ll be pleased to learn that it does provide an every method—they call it every, but as that link mentions, they also provide an alias called all.

More Related Contents:

  1. break array of objects into separate arrays based on a property
  2. Sorting an Array of JavaScript Objects a Specific Order (using existing function)
  3. javascript: hiding contents of key
  4. Need Pattern for password field?
  5. jQuery Ajax POST example with PHP
  6. Using jQuery’s ajax method to retrieve images as a blob
  7. How to import jquery using ES6 syntax?
  8. How to get a style attribute from a CSS class by javascript/jQuery?
  9. Submit multiple forms with one submit button
  10. How to load all the images from one of my folder into my web page, using Jquery/Javascript
  11. How to count the number of occurrences of each item in an array? [duplicate]
  12. How do I check if string contains substring? [duplicate]
  13. Jquery: change event to input file on IE
  14. jquery clone form fields and increment id
  15. Preventing click event with jQuery drag and drop
  16. Limiting number of lines in textarea
  17. jQuery single selector vs .find()
  18. Javascript with jQuery: Click and double click on same element, different effect, one disables the other
  19. jQuery counting elements by class – what is the best way to implement this?
  20. Google Maps Display:None Problem
  21. JavaScript keypress event not raised on Android browser
  22. Error handling in getJSON calls
  23. How to convert milliseconds into a readable date?
  24. Perform curl request in javascript?
  25. JQuery $.ajax() post – data in a java servlet
  26. Iterating a JavaScript object’s properties using jQuery
  27. collapse and expand tabs jquery / simple accordion
  28. Javascript Equivalent to C# LINQ Select
  29. Iframe inherit from parent
  30. trigger file upload dialog using javascript/jquery

Leave a Comment