[^\x20-\x7E] 在正则表达式中的用途 [英] Purpose of [^\x20-\x7E] in regular expressions

问题描述

 [^\x20-\x7E]

我看到此模式用于正则表达式，其目标是删除非 ascii字符串中的字符.什么意思?

I saw this pattern used for a regular expression in which the goal was to remove non-ascii characters from a string. What does it mean?

推荐答案

它说的是:所有不在 \x20-\ 范围内的字符 (^)x7E(十六进制 0x20 到 0x7E).

It says something like: all characters that are not (^) in the range \x20-\x7E (hex 0x20 to 0x7E).

根据http://www.asciitable.com/，这些是从空格到~.

According to http://www.asciitable.com/, those are characters from space to ~.

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