bash 将文件从驼峰式大小写转换为下划线的 awk/sed 脚本
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Awk/sed script to convert a file from camelCase to underscores
提问by Corentin Peuvrel
I want to convert several files in a project from camelCaseto underscore_case.
我想几个文件转换，从一个项目camelCase到underscore_case。
I would like to have a onliner that only needs the filename to work.
我想要一个只需要文件名就可以工作的在线工具。
回答by Avinash Raj
You could use sed also.
您也可以使用 sed。
$ echo 'fooBar' | sed -r 's/([a-z0-9])([A-Z])/_\L/g'
foo_bar
$ echo 'fooBar' | sed 's/\([a-z0-9]\)\([A-Z]\)/_\L/g'
foo_bar
回答by pachopepe
The proposed sedanswer has some issues:
建议的sed答案有一些问题：
$ echo 'FooBarFB' | sed -r 's/([a-z0-9])([A-Z])/_\L/g'
Foo_bar_fB
I sugesst the following
我建议以下
$ echo 'FooBarFB' | sed -r 's/([A-Z])/_\L/g' | sed 's/^_//'
foo_bar_f_b
回答by Corentin Peuvrel
After a few unsuccessful tries, I got this (I wrote it on several lines for readability, but we can remove the newlines to have a onliner) :
经过几次不成功的尝试后，我得到了这个（为了可读性，我把它写在几行上，但我们可以删除换行符以获得在线）：
awk -i inplace '{
while ( match(awk -i inplace '{
while ( match(awk '{...}' FILE > FILE.tmp && mv FILE.tmp FILE
, /(.*)([a-z0-9])_([a-z])(.*)/, cap))
$ cat tst.awk
{
head = ""
tail = ##代码##
while ( match(tail,/[[:upper:]]/) ) {
tgt = substr(tail,RSTART,1)
if ( substr(tail,RSTART-1,1) ~ /[[:lower:]]/ ) {
tgt = "_" tolower(tgt)
}
head = head substr(tail,1,RSTART-1) tgt
tail = substr(tail,RSTART+1)
}
print head tail
}
$ cat file
nowIs theWinterOfOur disContent
From ThePlay About RichardIII
$ awk -f tst.awk file
now_is the_winter_of_our dis_content
From The_play About Richard_iII
= cap[1] cap[2] toupper(cap[3]) cap[4];
print
}' FILE
, /(.*)([a-z0-9])([A-Z])(.*)/, cap))
##代码## = cap[1] cap[2] "_" tolower(cap[3]) cap[4];
print
}' FILE
For the sake of completeness, we can adapt it to do the contrary (underscore to CamelCase) :
为了完整起见，我们可以将它改写成相反的（CamelCase 下划线）：
##代码##If you're wondering, the -i inplaceis a flag only available with awk >=4.1.0, and it modify the file inplace (as with sed -i). If you're awk version is older, you have to do something like :
如果您想知道，这-i inplace是一个仅适用于 awk >=4.1.0 的标志，并且它就地修改文件（与 一样sed -i）。如果您的 awk 版本较旧，则必须执行以下操作：
Hope it could help someone !
希望它可以帮助某人！
回答by Ed Morton
This might be what you want:
这可能是你想要的：
##代码##but without your sample input and expected output it's just a guess.
但没有您的样本输入和预期输出，这只是一个猜测。
