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).
语法
dataview.setFloat64(byteOffset, value [, littleEndian])
参数
- 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.
返回
抛出错误
RangeError- 如果byteOffset超出了视图能储存的值,就会抛出错误.
例子
var buffer = new ArrayBuffer(8);
var dataview = new DataView(buffer);
dataview.setFloat64(0, 3);
dataview.getFloat64(0); // 3
规范
| Specification | Status | Comment |
|---|---|---|
| Typed Array Specification | Obsolete | Superseded by ECMAScript 6. |
| ECMAScript 2015 (6th Edition, ECMA-262) DataView.prototype.setFloat64 |
Standard | Initial definition in an ECMA standard. |
| ECMAScript (ECMA-262) DataView.prototype.setFloat64 |
Living Standard |
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