I have an ArrayBuffer that I convert to a Uint8Array so that I can use traditional array access with square brackets and gather a subarray. Now that I have the correct set of 4 bytes that describe the 32-bit (little endian) floating point number, I don't seem to have an easy way to convert to the floating point value:

var startIndex = 2;
var buffer = new Uint8Array(data)
buffer.subarray(startIndex, startIndex + 4);
var myNumber = ?uint8ArrayToFloat(buffer);
console.log(myNumber);

I'm new to JavaScript and am still looking around different docs...

I have an ArrayBuffer that I convert to a Uint8Array so that I can use traditional array access with square brackets and gather a subarray. Now that I have the correct set of 4 bytes that describe the 32-bit (little endian) floating point number, I don't seem to have an easy way to convert to the floating point value:

var startIndex = 2;
var buffer = new Uint8Array(data)
buffer.subarray(startIndex, startIndex + 4);
var myNumber = ?uint8ArrayToFloat(buffer);
console.log(myNumber);

I'm new to JavaScript and am still looking around different docs...

• javascript
• floating-point-conversion

Share Improve this question Follow asked Oct 3, 2014 at 22:35 tarabytetarabyte 19.3k1616 gold badges8686 silver badges126126 bronze badges

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1 Answer 1

Sorted by: Reset to default 5

You can use DataView.getFloat32. First, you would create the DataView from the original ArrayBuffer (or the Uint8Array). getFloat32 takes an optional parameter that allows you to specify the endianess of the data you are reading.