Skip to content

fix: operators/bit 关于取整性能谁更快的描述,并不是否否最快 #218

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Closed

mzvast wants to merge 1 commit into wangdoc:master from mzvast:master

Closed

fix: operators/bit 关于取整性能谁更快的描述,并不是否否最快 #218

Changes from all commits

Commits

Show all changes

Select commit

fix: operators/bit 关于取整性能的描述

mzvast May 9, 2021

File filter

Filter by extension

Conversations

Jump to

Jump to file

Failed to load files.

Loading

Diff view

Diff view

3 changes: 2 additions & 1 deletion docs/operators/bit.md

Show comments View file Open in desktop

Original file line number	Diff line number	Diff line change
Expand Up		@@ -55,6 +55,8 @@ toInt32(Math.pow(2, 32) - 1) // -1

		位运算只对整数有效,遇到小数时,会将小数部分舍去,只保留整数部分。所以,将一个小数与`0`进行二进制或运算,等同于对该数去除小数部分,即取整数位。

	使用二进制或运算取整,是所有取整方法中最快的一种。

		```javascript
		2.9 \| 0 // 2
		-2.9 \| 0 // -2
Expand Down Expand Up		@@ -110,7 +112,6 @@ toInt32(Math.pow(2, 32) - 1) // -1
		~~3 // 3
		```

	使用二进制否运算取整,是所有取整方法中最快的一种。

		对字符串进行二进制否运算,JavaScript 引擎会先调用`Number`函数,将字符串转为数值。

Expand Down