字符串操作与区分大小写

问题描述

假设我们有一个变量;

  set test =这是一个测试字符串。 
  

，我们要替换每个小写 t 使用大写 X 所需的输出;

  TesX sXring。 
 

我尝试使用字符串操作 set test =％test：t = X％ ，但它用 X 替换每个 t 。我也试过从@dbenham的，但不能

解决方案

没有本地批处理命令可以方便地进行区分大小写的字符串操作。原生批处理解决方案必须在循环中逐个字符地构建一个新的字符串。

EDIT - 很久以前，我写了一个纯粹的批处理实用程序，名为执行区分大小写查找/替换的内容文本文件。性能不错，但它有一些限制。我很少使用该代码。我写了一个配对例程来做一个变量而不是文本文件的大小写查找/替换，但我似乎已经失去了该代码。

今天我几乎总是使用每当我想要操作文本。

解决方案应该是：

  for / f delims ^ = ^ eol ^ = %% A in（'jrepl t X / s test'）do settest = %% A
  

b $ b

但似乎有一个错误。如果变量名称是除 test 之外的某个名称，它适用。看起来我有一些调试要做。

在修复错误之前，您可以使用：

  for / f delims ^ = ^ eol ^ = %% A in（'cmd / v：on / cecho（！test！）| jrepl t X %% A
  

更新：在版本3.4中 / S 选项现在可以使用名为 TEST / p>

Lets say we have a variable like;

set test=This is a Test string.

and we want to replace every lower-case t with upper-case X so desired output;

This is a TesX sXring.

i tryed using string manipulation set test=%test:t=X% but its replacing every t with X. I also tryed JREPL.bat from @dbenham but cant work it out.

解决方案

There is no native batch command that can conveniently do case sensitive string manipulation. A native batch solution would have to build a new string character by character in a loop. Very doable - but a pain and also inefficient.

EDIT - Long ago I wrote a pure batch utility called modFile.bat that does a case sensitive find/replace on the content of a text file. Performance isn't bad, but it does have some restrictions. I rarely use that code. I had written a companion routine to do case sensitive find/replace on a variable instead of a text file, but I seem to have lost that code.

Today I pretty much always use JREPL.BAT whenever I want to manipulate text.

The JREPL.BAT solution for your example should be:

for /f delims^=^ eol^= %%A in ('jrepl t X /s test') do set "test=%%A"

But there seems to be a bug. It works if the variable name is some name other than test. Looks like I have some debugging to do.

Until the bug is fixed, you can use:

for /f delims^=^ eol^= %%A in ('cmd /v:on /c "echo(!test!)|jrepl t X"') do set "test=%%A"

Update: The bug has been fixed in version 3.4 The /S option now works with a variable named TEST.

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