blocks|key|218640|text|尝试以下操作：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|218641|sed+'s/$[a-z]$$[a-z]*$/\U\1\L\2/g'|code-block|syntax|javascript|218642|我使用GNU就可以了，但是我不认为BSD+sed支持\U和\L。|offset|length|style|CODE|218643|entityMap^0|0|0|Q|2|T|2|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@$I|R|J|S|K|L]|$I|T|J|U|K|L]]|9|@]|A|$]]|$1|M|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|N|$]]

Try the following:

<pre><code>sed 's/$[a-z]$$[a-z]*$/\U\1\L\2/g'
</code></pre>

It works for me using GNU sed, but I don't think BSD sed supports <code>\U</code> and <code>\L</code>.

blocks|key|218645|text|使用awk：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|218646|echo+'test'+%7C+awk+'{
+++++for+(+i=1;+i+<=+NF;+i%2B%2B)+{
+++++++++sub(".",+substr(toupper($i),+1,1)+,+$i);
+++++++++print+$i;
+++++++++#+or
+++++++++#+print+substr(toupper($i),+1,1)+substr($i,+2);
+++++}
}'|code-block|syntax|javascript|218647|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Using awk:

<pre><code>echo 'test' | awk '{
 for ( i=1; i &lt;= NF; i++) {
 sub(".", substr(toupper($i), 1,1) , $i);
 print $i;
 # or
 # print substr(toupper($i), 1,1) substr($i, 2);
 }
}'
</code></pre>

blocks|key|2865634|text|不需要使用捕获组(尽管&在某种程度上是捕获组)：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2865635|echo+"taco+my-fish-tacos+my_fish_tacos"+%7C+sed+'s/[%5E+_-]*/\u&/g'|code-block|syntax|javascript|2865636|输出：|2865637|Taco+My-Fish-Tacos+My_Fish_Tacos|2865638|转义的小写字母"u“将匹配的子字符串中的下一个字符大写。|2865639|entityMap^0|B|1|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|V|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|W|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|Y|8|@]|D|@]|E|$]]|$1|Q|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|R|$]]

There's no need to use capture groups (although <code>&amp;</code> is a one in a way):

<pre><code>echo "taco my-fish-tacos my_fish_tacos" | sed 's/[^ _-]*/\u&amp;/g'
</code></pre>

The output:

<pre><code>Taco My-Fish-Tacos My_Fish_Tacos
</code></pre>

The escaped lower case "u" capitalizes the next character in the matched sub-string.

blocks|key|3078972|text|这里有一个不使用\u的解决方案，它并不是所有seds都通用的。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3078973|将此文件保存到capitalize.sed，然后运行sed+-i+-f+capitalize.sed+FILE|3078974|s:%5E:.:
h
y/qwertyuiopasdfghjklzxcvbnm/QWERTYUIOPASDFGHJKLZXCVBNM/+
G+
s:$:\n:
:r
/%5E.\n.\n/{s:::;p;d}
/%5E[%5E[:alpha:]][[:alpha:]]/+{
++++s:.$.$$.*$:x\2\1:+
++++s:\n$..$:\nx:+
++++tr
}

/%5E[[:alpha:]][[:alpha:]]/+{
++++s:\n.$.$$.*$$:\nx\2\1:
++++s:..:x:
++++tr
}
/%5E[%5E\n]/+{
++++s:%5E.$.$$.*$$:.\2\1:
++++s:\n..:\n.:
++++tr
}|code-block|syntax|javascript|3078975|entityMap^0|8|2|0|7|E|Q|T|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|R|8|@$9|S|A|T|B|C]|$9|U|A|V|B|C]]|D|@]|E|$]]|$1|H|3|I|5|J|7|W|8|@]|D|@]|E|$K|L]]|$1|M|3|-4|5|6|7|X|8|@]|D|@]|E|$]]]|N|$]]

Here is a solution that does not use the <code>\u</code>, that is not common to all seds.

Save this file into <code>capitalize.sed</code>, then run <code>sed -i -f capitalize.sed FILE</code>

<pre><code>s:^:.:
h
y/qwertyuiopasdfghjklzxcvbnm/QWERTYUIOPASDFGHJKLZXCVBNM/ 
G 
s:$:\n:
:r
/^.\n.\n/{s:::;p;d}
/^[^[:alpha:]][[:alpha:]]/ {
 s:.$.$$.*$:x\2\1: 
 s:\n$..$:\nx: 
 tr
}

/^[[:alpha:]][[:alpha:]]/ {
 s:\n.$.$$.*$$:\nx\2\1:
 s:..:x:
 tr
}
/^[^\n]/ {
 s:^.$.$$.*$$:.\2\1:
 s:\n..:\n.:
 tr
}
</code></pre>

blocks|key|3078977|text|这可能适用于您(GNU+sed)：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3078978|echo+"aaa+bbb+ccc+aaa-bbb-ccc+aaa_bbb_ccc+aaa-bbb_ccc"++%7C+sed+'s/\<.\%7C_./\U&/g'
Aaa+Bbb+Ccc+Aaa-Bbb-Ccc+Aaa_Bbb_Ccc+Aaa-Bbb_Ccc|code-block|syntax|javascript|3078979|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This might work for you (GNU sed):

<pre><code>echo "aaa bbb ccc aaa-bbb-ccc aaa_bbb_ccc aaa-bbb_ccc" | sed 's/\&lt;.\|_./\U&amp;/g'
Aaa Bbb Ccc Aaa-Bbb-Ccc Aaa_Bbb_Ccc Aaa-Bbb_Ccc
</code></pre>

blocks|key|218659|text|alinsoar令人兴奋的解决方案在Plan9+sed中根本不起作用，在busybox+sed中也不起作用。但是您仍然应该尝试弄清楚它是如何工作的:您将学到很多关于sed的知识。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|218660|这里有一个不那么聪明但更容易理解的版本，它至少可以在Plan9、busybox和GNU+sed+(可能还有BSD和MacOS)中工作。Plan9+sed需要在s命令的match部分删除反斜杠。|offset|length|style|CODE|218661|#!+/bin/sed+-f

y/PYFGCRLAOEUIDHTNSQJKXBMWVZ/pyfgcrlaoeuidhtnsqjkxbmwvz/

s/$%5E\%7C[%5EA-Za-z]$a/\1A/g
s/$%5E\%7C[%5EA-Za-z]$b/\1B/g
s/$%5E\%7C[%5EA-Za-z]$c/\1C/g
s/$%5E\%7C[%5EA-Za-z]$d/\1D/g
s/$%5E\%7C[%5EA-Za-z]$e/\1E/g
s/$%5E\%7C[%5EA-Za-z]$f/\1F/g
s/$%5E\%7C[%5EA-Za-z]$g/\1G/g
s/$%5E\%7C[%5EA-Za-z]$h/\1H/g
s/$%5E\%7C[%5EA-Za-z]$i/\1I/g
s/$%5E\%7C[%5EA-Za-z]$j/\1J/g
s/$%5E\%7C[%5EA-Za-z]$k/\1K/g
s/$%5E\%7C[%5EA-Za-z]$l/\1L/g
s/$%5E\%7C[%5EA-Za-z]$m/\1M/g
s/$%5E\%7C[%5EA-Za-z]$n/\1N/g
s/$%5E\%7C[%5EA-Za-z]$o/\1O/g
s/$%5E\%7C[%5EA-Za-z]$p/\1P/g
s/$%5E\%7C[%5EA-Za-z]$q/\1Q/g
s/$%5E\%7C[%5EA-Za-z]$r/\1R/g
s/$%5E\%7C[%5EA-Za-z]$s/\1S/g
s/$%5E\%7C[%5EA-Za-z]$t/\1T/g
s/$%5E\%7C[%5EA-Za-z]$u/\1U/g
s/$%5E\%7C[%5EA-Za-z]$v/\1V/g
s/$%5E\%7C[%5EA-Za-z]$w/\1W/g
s/$%5E\%7C[%5EA-Za-z]$x/\1X/g
s/$%5E\%7C[%5EA-Za-z]$y/\1Y/g
s/$%5E\%7C[%5EA-Za-z]$z/\1Z/g|code-block|syntax|javascript|218662|entityMap^0|0|27|1|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@$D|Q|E|R|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|S|8|@]|9|@]|A|$K|L]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

alinsoar's mind-blowing solution doesn't work at all in Plan9 sed, or correctly in busybox sed. But you should still try to figure out how it's supposed to do its thing: you will learn a lot about sed.

Here's a not-as-clever but easier to understand version which works in at least Plan9, busybox, and GNU sed (and probably BSD and MacOS). Plan9 sed needs backslashes removed in the match part of the <code>s</code> command.

<pre><code>#! /bin/sed -f

y/PYFGCRLAOEUIDHTNSQJKXBMWVZ/pyfgcrlaoeuidhtnsqjkxbmwvz/

s/$^\|[^A-Za-z]$a/\1A/g
s/$^\|[^A-Za-z]$b/\1B/g
s/$^\|[^A-Za-z]$c/\1C/g
s/$^\|[^A-Za-z]$d/\1D/g
s/$^\|[^A-Za-z]$e/\1E/g
s/$^\|[^A-Za-z]$f/\1F/g
s/$^\|[^A-Za-z]$g/\1G/g
s/$^\|[^A-Za-z]$h/\1H/g
s/$^\|[^A-Za-z]$i/\1I/g
s/$^\|[^A-Za-z]$j/\1J/g
s/$^\|[^A-Za-z]$k/\1K/g
s/$^\|[^A-Za-z]$l/\1L/g
s/$^\|[^A-Za-z]$m/\1M/g
s/$^\|[^A-Za-z]$n/\1N/g
s/$^\|[^A-Za-z]$o/\1O/g
s/$^\|[^A-Za-z]$p/\1P/g
s/$^\|[^A-Za-z]$q/\1Q/g
s/$^\|[^A-Za-z]$r/\1R/g
s/$^\|[^A-Za-z]$s/\1S/g
s/$^\|[^A-Za-z]$t/\1T/g
s/$^\|[^A-Za-z]$u/\1U/g
s/$^\|[^A-Za-z]$v/\1V/g
s/$^\|[^A-Za-z]$w/\1W/g
s/$^\|[^A-Za-z]$x/\1X/g
s/$^\|[^A-Za-z]$y/\1Y/g
s/$^\|[^A-Za-z]$z/\1Z/g
</code></pre>

I have three types of strings that I'd like to capitalize in a bash script. I figured sed/awk would be my best bet, but I'm not sure. What's the best way given the following requirements?

<ol>
<li>single word 
 e.g. <code>taco -&gt; Taco</code></li>
<li>multiple words separated by hyphens 
 e.g. <code>my-fish-tacos -&gt; My-Fish-Tacos</code></li>
<li>multiple words separated by underscores 
 e.g. <code>my_fish_tacos -&gt; My_Fish_Tacos</code></li>
</ol>

Capitalize strings in sed or awk

MacOS

我有三种类型的字符串，我想在bash脚本中使用它们。我认为sed/awk是我最好的选择，但我不确定。考虑到以下要求，最好的方法是什么？单字例如，用连字符分隔的taco -> Tacomultiple单词例如，用下划线分隔的my-fish-tacos -> My-Fish-Tacosmultiple单词例如my_fish...

问将sed或awk中的字符串大写
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