本文介绍了Shell脚本中变量的第一个字符为大写吗?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有一个Shell脚本,可以启动模块的单元测试.我需要所有小写字母和第一个大写字母的模块名称.到目前为止,我一直在这样做:
I have a shell script that starts unit tests for modules. I need the name of the module in all lowercase and with the first character uppercase. So far I have been doing it like this:
#!/bin/sh -x
# z.B. getbrowser
strModuleToTest=$1
# g
strModuleToTestUppercaseFirstletter=${strModuleToTest:0:1}
# etbrowser
strModuleToTestUppercaseLastletters=${strModuleToTest:1}
# g -> G
strModuleToTestUppercaseFirstletter="${strModuleToTestUppercaseFirstletter/a/A}"
strModuleToTestUppercaseFirstletter="${strModuleToTestUppercaseFirstletter/b/B}"
strModuleToTestUppercaseFirstletter="${strModuleToTestUppercaseFirstletter/c/C}"
strModuleToTestUppercaseFirstletter="${strModuleToTestUppercaseFirstletter/d/D}"
strModuleToTestUppercaseFirstletter="${strModuleToTestUppercaseFirstletter/e/E}"
strModuleToTestUppercaseFirstletter="${strModuleToTestUppercaseFirstletter/f/F}"
strModuleToTestUppercaseFirstletter="${strModuleToTestUppercaseFirstletter/g/G}"
strModuleToTestUppercaseFirstletter="${strModuleToTestUppercaseFirstletter/h/H}"
strModuleToTestUppercaseFirstletter="${strModuleToTestUppercaseFirstletter/i/I}"
strModuleToTestUppercaseFirstletter="${strModuleToTestUppercaseFirstletter/j/J}"
strModuleToTestUppercaseFirstletter="${strModuleToTestUppercaseFirstletter/k/K}"
strModuleToTestUppercaseFirstletter="${strModuleToTestUppercaseFirstletter/l/L}"
strModuleToTestUppercaseFirstletter="${strModuleToTestUppercaseFirstletter/m/M}"
strModuleToTestUppercaseFirstletter="${strModuleToTestUppercaseFirstletter/n/N}"
strModuleToTestUppercaseFirstletter="${strModuleToTestUppercaseFirstletter/o/O}"
strModuleToTestUppercaseFirstletter="${strModuleToTestUppercaseFirstletter/p/P}"
strModuleToTestUppercaseFirstletter="${strModuleToTestUppercaseFirstletter/q/Q}"
strModuleToTestUppercaseFirstletter="${strModuleToTestUppercaseFirstletter/r/R}"
strModuleToTestUppercaseFirstletter="${strModuleToTestUppercaseFirstletter/s/S}"
strModuleToTestUppercaseFirstletter="${strModuleToTestUppercaseFirstletter/t/T}"
strModuleToTestUppercaseFirstletter="${strModuleToTestUppercaseFirstletter/u/U}"
strModuleToTestUppercaseFirstletter="${strModuleToTestUppercaseFirstletter/v/V}"
strModuleToTestUppercaseFirstletter="${strModuleToTestUppercaseFirstletter/w/W}"
strModuleToTestUppercaseFirstletter="${strModuleToTestUppercaseFirstletter/x/X}"
strModuleToTestUppercaseFirstletter="${strModuleToTestUppercaseFirstletter/y/Y}"
strModuleToTestUppercaseFirstletter="${strModuleToTestUppercaseFirstletter/z/Z}"
# Getbrowser
strModuleToTestUppercase=$strModuleToTestUppercaseFirstletter""$strModuleToTestUppercaseLastletters
设置$ strModuleToTestUppercase的更简单方法是什么?我尝试过
What would be an easier way to set $strModuleToTestUppercase? I tried
strModuleToTestUppercase="${strModuleToTest[@]^}"
或
strModuleToTestUppercasesed="sed 's/\<./\u&/g' $strModuleToTest"
但没有成功.
推荐答案
如果:
s=somemodule
使用bash v4 +
echo ${s^}
这应该适用于较旧的bash版本(来自Glenn):
This should work with a bit older bash versions (from Glenn):
echo $(tr a-z A-Z <<< ${s:0:1})${s:1}"
使用zsh
echo ${(C)s}
带有ash和coreutils
echo $(echo $s | cut -c1 | tr a-z A-Z)$(echo $s | cut -c2-)
使用GNU sed
echo $s | sed 's/./\U&/'
使用BSD sed
echo $s | sed '
h;
y/quvwxzdermatoglyphicsbfjkn/QUVWXZDERMATOGLYPHICSBFJKN/;
G;
s/\(.\)[^\n]*\n.\(.*\)/\1\2/;
'
awk
echo $s | awk '{ print toupper(substr($0, 1, 1)) substr($0, 2) }'
使用perl
echo $s | perl -nE 'say ucfirst'
使用python
echo $s | python -c 'import sys; print sys.stdin.readline().rstrip().capitalize()'
与红宝石
echo $s | ruby -e 'puts ARGF.read.capitalize'
所有情况下的输出结果
Somemodule
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