Change the value of an array changes original array JavaScript

by

Yes. Both valueArray and labelArray reference the same underlying array. To make a copy, use slice():

valueArray = labelArray.slice(0);

NOTE: Slice() only copies 1 level deep, which works fine for primitive arrays. If the array contains complex objects, use something like jQuery’s clone(), credit @Jonathan.

More Related Contents:

  1. Array value is replaced when second one stores in php
  2. Javascript Array – Split string at numbers [closed]
  3. Making new array and push there keys on that new array [closed]
  4. How do I empty an array in JavaScript?
  5. How can I add new array elements at the beginning of an array in JavaScript?
  6. Why is using “for…in” for array iteration a bad idea?
  7. Remove array element based on object property
  8. How to get character array from a string?
  9. How to find index of all occurrences of element in array?
  10. Comparing Arrays of Objects in JavaScript
  11. Sorting an array of objects by property values
  12. Convert array of strings into an array of objects
  13. Access non-numeric Object properties by index?
  14. How to check if an array is a subset of another array in JavaScript?
  15. Why do I need to copy an array to use a method on it?
  16. How are JavaScript arrays represented in physical memory?
  17. Convert simple array into two-dimensional array (matrix)
  18. Why is the loop assigning a reference of the last index element to? [duplicate]
  19. Remove duplicate values from an array of objects in javascript [duplicate]
  20. Javascript – Sort Array of objects by 2 Properties
  21. Convert javascript array to string
  22. Recursively filter array of objects
  23. How to calculate intersection of multiple arrays in JavaScript? And what does [equals: function] mean?
  24. Convert an array to an array of objects
  25. How to create an array of objects from multiple arrays
  26. use Lodash to sort array of object by value
  27. How to convert array of key–value objects to array of objects with a single property?
  28. Find closest date in array with JavaScript
  29. Sum values of objects in array
  30. How are JavaScript arrays implemented?

Leave a Comment