Home - News ( United States | United Kingdom | Italy | Germany ) - Football scores

Showing content from http://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/DataView/getFloat64 below:

DataView.prototype.getFloat64() - JavaScript | MDN

Baseline Widely available

getFloat64() 方法从 DataView相对于起始位置偏移 n 个字节处开始，获取一个 64-bit 数 (双精度浮点型，8 个字节)。

// Create an ArrayBuffer with a size in bytes
const buffer = new ArrayBuffer(16);

const view = new DataView(buffer);
view.setFloat64(1, Math.PI);

console.log(view.getFloat64(1));
// Expected output: 3.141592653589793

dataview.getFloat64(byteOffset [, littleEndian])

byteOffset

偏移量，单位为字节，从头开始计算。

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 read.

一个双精度浮点型 64 位数。

RangeError

如果 byteOffset 超出了视图能储存的值，就会抛出错误。

没有对齐约束; 多字节值可以从任何偏移量获取。

var buffer = new ArrayBuffer(8);
var dataview = new DataView(buffer);
dataview.getFloat64(1); // 0

RetroSearch is an open source project built by @garambo | Open a GitHub Issue

Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo

HTML: 3.2 | Encoding: UTF-8 | Version: 0.7.4