2批次字符串问题 [英] 2 batch string questions

问题描述

1）是否有任何内置的，可以告诉我，如果一个变量的内容只包含大写字母？

1) Is there any built-in which can tell me if a variable's contents contain only uppercase letters?

2）有没有什么办法，看看是否变量包含一个字符串？例如，我想看看如果变量％PATH％含有红宝石。

2) is there any way to see if a variable contains a string? For example, I'd like to see if the variable %PATH% contains Ruby.

推荐答案

有关部分1， FINDSTR 就是答案。你可以使用正则表达式的功能以及错误级别：

For part 1, findstr is the answer. You can just use the regex feature along with errorlevel:

> set xxokay=ABC
> set xxbad=AB1C
> echo %xxokay%|findstr /r "^[A-Z]*$" >nul:
> echo %errorlevel%
0
> echo %xxbad%|findstr /r "^[A-Z]*$" >nul:
> echo %errorlevel%
1

这是在这种情况下，你做的重要的是不要的有回声％xxokay％和管道字符空格 | ，因为这将导致空间被输出这不是你上可接受的角色之一

It's important in this case that you do not have a space between the echo %xxokay% and the pipe character |, since that will result in a space being output which is not one of your acceptable characters.

有关第2部分， FINDSTR 也是答案（ / I 是忽略这可能是你想要的情况下， - 离开它，如果情况必须匹配）：

For part 2, findstr is also the answer (/i is ignore case which may be what you want - leave it off if case must match):

> set xxruby=somewhere;c:\ruby;somewhere_else
> set xxnoruby=somewhere;somewhere_else
> echo %xxruby%|findstr /i ruby >nul:
> echo %errorlevel%
0
> echo %xxnoruby%|findstr /i ruby >nul:
> echo %errorlevel%
1

您可以再使用：

if %errorlevel%==1 goto :label

要改变这两种情况下你的脚本的行为。

to change the behaviour of your script in both cases.

例如，对于红宝石检查code段可能是这样的：

For example, the code segment for the ruby check could be something like:

:ruby_check
    echo %yourvar%|findstr /i ruby >nul:
    if %errorlevel%==1 goto :ruby_check_not_found
:ruby_check_found
    :: ruby was found
    goto :ruby_check_end
:ruby_check_not_found:
    :: ruby was NOT found
:ruby_check_end

这篇关于2批次字符串问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！