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length Property (Float32Array)

The length of the array.

var arrayLength = float32Array.length;

The following example shows how to get the length of the array.

var req = new XMLHttpRequest();
    req.open('GET', "http://www.example.com");
    req.responseType = "arraybuffer";
    req.send();

    req.onreadystatechange = function () {
        if (req.readyState === 4) {
            var buffer = req.response;
            var dataView = new DataView(buffer);
            var floatArr = new Float32Array(buffer.byteLength / 4);
            alert(floatArr.length);
        }
    }

Supported in the following document modes: Internet Explorer 10 standards and Internet Explorer 11 standards. Also supported in Store apps (Windows 8 and Windows Phone 8.1). See Version Information. Not supported in the following document modes: Quirks, Internet Explorer 6 standards, Internet Explorer 7 standards, Internet Explorer 8 standards, Internet Explorer 9 standards.

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