How can I merge TypedArrays in JavaScript?

Question

I\'d like to merge multiple arraybuffers to create a Blob. however, as you know, TypedArray dosen\'t have \"push\" or useful methods...

E.g.:

var a          


        

Answer 1

if I have multiple typed arrays

            arrays = [ typed_array1, typed_array2,..... typed_array100]

I want concat all 1 to 100 sub array into single 'result' this function works for me.

  single_array = concat(arrays)


function concat(arrays) {
  // sum of individual array lengths
  let totalLength = arrays.reduce((acc, value) => acc + value.length, 0);

  if (!arrays.length) return null;

   let result = new Uint8Array(totalLength);

      // for each array - copy it over result
      // next array is copied right after the previous one
      let length = 0;
      for(let array of arrays) {
            result.set(array, length);
            length += array.length;
      }

      return result;
   }