Question

37

.push() on Float32Array

rated 0 times [ 42] [ 5] / answers: 1 / hits: 18522 / 10 Years ago, wed, june 25, 2014, 12:00:00

I can't use .push() on a Float32Array, I get an error, so I tried to add it like this :

myarray = new Float32Array() ;

myarray.push = function()

{

    for( var i in arguments )

    {

        this[this.length] = arguments[i] ;

    }

} ;

But it does not work. I do not get errors, but my array's values are all 0.
Why ?

Answers

Only authorized users can answer the question. Please sign in first, or register a free account.

emiliotristinv

Add To Favorites

Follow

Total Points: 181

Total Questions: 99

Total Answers: 96

Location: Argentina

Member since Fri, Oct 21, 2022

2 Years ago

emiliotristinv questions

1 Extend Functional Components in ReactJS

Wed, Jun 16, 21, 00:00, 3 Years ago

1 How do I get acces to only one item from map method in react js

Tue, Apr 6, 21, 00:00, 3 Years ago

1 How to get the return value of a async function that returns a promise

Sun, Feb 21, 21, 00:00, 3 Years ago

1 Add button inside Input field ReactJS

Tue, May 12, 20, 00:00, 4 Years ago

1 How to properly update an array inside a react hook state

Tue, Mar 31, 20, 00:00, 4 Years ago

View All

answered 10 Years ago destiney · Accepted Answer

Basically a Float32Array is just a view over an ArrayBuffer object (as are all typed arrays in JS). This ArrayBuffer has a fixed length, which in turn the Float32Array inherits.

So to conclude: You just can not change the size of your Float32Array on the fly. The only possibility would be as this:

Create a new array with the length of the old array + 1

Copy all items of the old array over to the new array.

Insert the new item as the last item in the new array.

Replace all instances of the old array with the new array.

If you want to add multiple values on multiple occasions, I strongly advise against this. This completely negates any performance advantage you might gain from using typed arrays!