Transforming an element into a buffer using JavaScript

Question

Transforming an element into a buffer using JavaScript

Utilizing Plain JavaScript for Data Transfer in Web Workers

In my current project, I am avoiding the use of Node and sticking to plain JavaScript within the browser. One challenge I encountered is efficiently sending data to web workers. After some experimentation, I successfully created buffers from arrays as shown below:

// assume it contains integers
var numbers = new Int8Array(10); 

// works
const data = {buffer: numbers.buffer};
worker.postMessage(data, [data.buffer]);

Now, let's consider a scenario where I have an object structured like this:

var myObject = {'in': [0.123,-0,521], 'out' : [1.409]};

The question that arises is how can I convert this object into a buffer without relying on Node.js? I came across similar inquiries online, but most solutions involved using Node which is not part of my current setup.

javascript buffer web-worker

Answer 1

Answer №1

To form a typed Array of values, you can follow this structure:

[obj1.in1,obj1.in2,obj1.out,obj2.in1,...]

If you have just one object:

var arr=Int8Array.from(myObject.in.concat(myObject.out));

In case you are dealing with an Array of objects:

var ObjArr=[obj1,obj2];
var arr=new Int8Array(ObjArr.length*3);

for(var i=0;i<ObjArr.length;i++){
  var obj=ObjArr[i];
  arr.set(obj.in.concat(obj.out),i*3);
}

You can iterate over the array using a simple for loop like so:

for(var i=0;i<arr.length-2;i+=3){
 var in1=arr[i],in2=arr[i+1],out=arr[i+2];
 ...
}

Answer 2

To form a typed Array of values, you can follow this structure:

[obj1.in1,obj1.in2,obj1.out,obj2.in1,...]

If you have just one object:

var arr=Int8Array.from(myObject.in.concat(myObject.out));

In case you are dealing with an Array of objects:

var ObjArr=[obj1,obj2];
var arr=new Int8Array(ObjArr.length*3);

for(var i=0;i<ObjArr.length;i++){
  var obj=ObjArr[i];
  arr.set(obj.in.concat(obj.out),i*3);
}

You can iterate over the array using a simple for loop like so:

for(var i=0;i<arr.length-2;i+=3){
 var in1=arr[i],in2=arr[i+1],out=arr[i+2];
 ...
}

Transforming an element into a buffer using JavaScript

Utilizing Plain JavaScript for Data Transfer in Web Workers

Answer №1

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