DataView.prototype.setFloat64()

setFloat64()从DataView起始位置以byte为计数的指定偏移量(byteOffset)处储存一个64-bit数(双精度浮点型).

dataview.setFloat64(byteOffset, value [, littleEndian])

byteOffset

偏移量,从头开始计算,单位为字节.

value

设置的数值.

littleEndian

可选 Indicates whether the 64-bit float is stored in little- or big-endian format. If false or undefined, a big-endian value is written.

undefined.

RangeError

如果byteOffset超出了视图能储存的值,就会抛出错误.

var buffer = new ArrayBuffer(8);
var dataview = new DataView(buffer);
dataview.setFloat64(0, 3);
dataview.getFloat64(0); // 3

• DataView
• ArrayBuffer