Combining multiple Float32Arrays to create a single Float32Array

Question

Combining multiple Float32Arrays to create a single Float32Array

I need help creating a function that can flatten multiple Float32Arrays into one large Float32Array

const first = new Float32Array([1,2]);
const second = new Float32Array([3,4,5]);
const third = new Float32Array([6,7,8,9]);

const chunks = [first,second,third];


//I am looking for a function that takes an array of Float32Arrays 
//and returns a single Float32Array that combines all the arrays in the input. 
const flattenFloat32 = (chunks) => {
  //Code needed for this function
  return 

}

console.log(flattenFloat32(chunks))

javascript flatten

Answer 1

Answer №1

Float32Array.of can handle multiple arguments depending on your environment's stack limit, allowing you to do something like:

const result = Float32Array.of(...first, ...second, ...third);

const first = new Float32Array([1,2]);
const second = new Float32Array([3,4,5]);
const third = new Float32Array([6,7,8,9]);

const result = Float32Array.of(...first, ...second, ...third);

console.log(result);

You also have the option of using the set function to populate a new array from your original arrays, utilizing their lengths as offsets:

const result = new Float32Array(
    first.length + second.length + third.length
);

result.set(first, 0);
result.set(second, first.length);
result.set(third, first.length + second.length);

const first = new Float32Array([1,2]);
const second = new Float32Array([3,4,5]);
const third = new Float32Array([6,7,8,9]);

const result = new Float32Array(
    first.length + second.length + third.length
);

result.set(first, 0);
result.set(second, first.length);
result.set(third, first.length + second.length);

console.log(result);

Answer 2

Float32Array.of can handle multiple arguments depending on your environment's stack limit, allowing you to do something like:

const result = Float32Array.of(...first, ...second, ...third);

const first = new Float32Array([1,2]);
const second = new Float32Array([3,4,5]);
const third = new Float32Array([6,7,8,9]);

const result = Float32Array.of(...first, ...second, ...third);

console.log(result);

You also have the option of using the set function to populate a new array from your original arrays, utilizing their lengths as offsets:

const result = new Float32Array(
    first.length + second.length + third.length
);

result.set(first, 0);
result.set(second, first.length);
result.set(third, first.length + second.length);

const first = new Float32Array([1,2]);
const second = new Float32Array([3,4,5]);
const third = new Float32Array([6,7,8,9]);

const result = new Float32Array(
    first.length + second.length + third.length
);

result.set(first, 0);
result.set(second, first.length);
result.set(third, first.length + second.length);

console.log(result);

Answer 3

Answer №2

Success! I have discovered the answer.

const mergeFloat32Arrays = (arrays) => {
    // Determine total frames in new Float32Array
    const totalFrames = arrays.reduce((acc, elem) => acc + elem.length, 0)
    
    // Create new Float32Array with correct number of frames
    const result = new Float32Array(totalFrames);
    
    // Insert each array into the new Float32Array 
    let currentFrame = 0;
    arrays.forEach((array) => {
        result.set(array, currentFrame)
        currentFrame += array.length;
    });
    return result;
 }    

const first = new Float32Array([1,2]);
const second = new Float32Array([3,4,5]);
const third = new Float32Array([6,7,8,9]);

const arrays = [first, second, third];
console.log(mergeFloat32Arrays(arrays))

Answer 4

Success! I have discovered the answer.

const mergeFloat32Arrays = (arrays) => {
    // Determine total frames in new Float32Array
    const totalFrames = arrays.reduce((acc, elem) => acc + elem.length, 0)
    
    // Create new Float32Array with correct number of frames
    const result = new Float32Array(totalFrames);
    
    // Insert each array into the new Float32Array 
    let currentFrame = 0;
    arrays.forEach((array) => {
        result.set(array, currentFrame)
        currentFrame += array.length;
    });
    return result;
 }    

const first = new Float32Array([1,2]);
const second = new Float32Array([3,4,5]);
const third = new Float32Array([6,7,8,9]);

const arrays = [first, second, third];
console.log(mergeFloat32Arrays(arrays))

Combining multiple Float32Arrays to create a single Float32Array

Answer №1

Answer №2

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