Question

How to use TypedArray.slice() to get a shallow copy of a portion of a typed array into a new typed array in JavaScript

Answer 1

// typedarray.slice([begin[, end]])

var arr = new Uint8Array([4, 9, 25, 31])

arr_slice = arr.slice(1);

for (var i = 0; i < arr_slice.length; i++)
    document.write(arr_slice[i] + " ");


/*
run:

9 25 31  

*/

 

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Answer 2

// typedarray.slice([begin[, end]])

var arr = new Uint8Array([4, 9, 25, 31, 90])

arr_slice = arr.slice(2);

for (var i = 0; i < arr_slice.length; i++)
    document.write(arr_slice[i] + " ");


/*
run:

25 31 90  

*/

 

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Answer 3

// typedarray.slice([begin[, end]])

var arr = new Uint8Array([4, 9, 25, 31, 90])

arr_slice = arr.slice(-2);

for (var i = 0; i < arr_slice.length; i++)
    document.write(arr_slice[i] + " ");


/*
run:

31 90   

*/

 

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Answer 4

// typedarray.slice([begin[, end]])

var arr = new Uint8Array([4, 9, 25, 31, 90])

arr_slice = arr.slice(0, 1);

for (var i = 0; i < arr_slice.length; i++)
    document.write(arr_slice[i] + " ");


/*
run:

4   

*/

 

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