Imagine we have an array called
colorArray = ['B', 'G', 'R', 'A']Uint8Array. How can we concatenate these two arrays together?
I attempted to use
var newArray = colorArray.concat(array2)Here's a helpful solution:
const newArray = Array.from(uint8Array);
const finalArray = oldArray.concat(newArray);
In order to achieve the desired outcome, your output (array3) needs to be in the form of a Uint8Array.
To accomplish this, you can use the following code snippet:
const array3 = new Uint8Array([ ...array1, ...array2]);
Your implementation is constructing a new array that combines your four strings followed by the Uint8Array as one element.
Array.prototype.concat behaves uniquely. When provided with non-"concat spreadable" arguments (like arrays), it appends those values as individual elements in the resulting array.
Typed arrays do not support being spreadable with concat:
const uint8 = Uint8Array.from([3, 4]);
console.log(uint8[Symbol.isConcatSpreadable]); // undefined (by default, false)
const softArray = [1, 2];
const result = softArray.concat(uint8);
console.log(result.length); // 3
console.log(result[0]); // 1
console.log(result[1]); // 2
console.log(result[2]); // (A Uint8Array containing 3, 4)You can opt for spread instead of using concat:
const array1 = ['B', 'G', 'R', 'A'];
const array2 = Uint8Array.from([1, 2, 3]);
const result = [...array1, ...array2];
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