blocks|key|1380675|text|作为开始，您可以使用this，它将每个单词读入一个数组|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1380676|#!/bin/bash

total=0
while+read
do
++++for+word+in+$REPLY
++++do
++++++++A[$total]=$word
++++++++total=$(($total%2B1))
++++done
done+<+input.txt

for+i+in+"${A[@]}"
do
++++echo+$i
done|code-block|syntax|javascript|1380677|下一步是使用seq或类似的方法对数组进行循环，并以三个一组的形式打印出来。|offset|length|style|CODE|1380678|entityMap^0|0|0|6|3|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]]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

As a start you can use this, which reads every word into an array

<pre><code>#!/bin/bash

total=0
while read
do
 for word in $REPLY
 do
 A[$total]=$word
 total=$(($total+1))
 done
done &lt; input.txt

for i in "${A[@]}"
do
 echo $i
done
</code></pre>

Next step is to use <code>seq</code> or similar to loop through the array and print it in groups of three.

blocks|key|1380774|text|一次读三个单词。将正在读取的行设置为余数：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1380775|while+read+-r+remainder
do
++++while+[[+-n+$remainder+]]
++++do
++++++++read+-r+a+b+c+remainder+<<<+"$remainder"
++++++++echo+"$a+$b+$c"
++++done
done+<+inputfile|code-block|syntax|javascript|1380776|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|$]]

Read the words three at a time. Set the line being read from to the remainder:

<pre><code>while read -r remainder
do
 while [[ -n $remainder ]]
 do
 read -r a b c remainder &lt;&lt;&lt; "$remainder"
 echo "$a $b $c"
 done
done &lt; inputfile
</code></pre>

blocks|key|1742831|text|粘贴命令怎么样？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1742832|for+word+in+$line;+do+echo+$word;+done+%7C+paste+-+-+-
for+word+in+$line;+do+echo+$word;+done+%7C+paste+-d"+"+-+-+-|code-block|syntax|javascript|1742833|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|$]]

What about paste command

<pre><code>for word in $line; do echo $word; done | paste - - -
for word in $line; do echo $word; done | paste -d" " - - -
</code></pre>

blocks|key|3104852|text|简单的正则表达式练习。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3104853|sed+-e+"s/$[%5E\+]*\+[%5E\+]*\+[%5E\+]*$\+/\1\\`echo+-e+'\n\r'`/g"|code-block|syntax|javascript|3104854|唯一棘手的部分是在sed中获取新行，因为没有标准。|3104855|$+echo+"I+am+writing+this+line+for+testing+the+code."%7Csed+-e+"s/$[%5E\+]*\+[%5E\+]*\+[%5E\+]*$\+/\1\\`echo+-e+'\n\r'`/g"
I+am+writing
this+line+for
testing+the+code.|3104856|不用谢。|3104857|entityMap^0|0|0|0|0|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]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

Easy regex exercise.

<pre><code>sed -e "s/$[^\ ]*\ [^\ ]*\ [^\ ]*$\ /\1\\`echo -e '\n\r'`/g"
</code></pre>

The only tricky part was getting the new line in the sed, as there isn't a standard for that.

<pre><code>$ echo "I am writing this line for testing the code."|sed -e "s/$[^\ ]*\ [^\ ]*\ [^\ ]*$\ /\1\\`echo -e '\n\r'`/g"
I am writing
this line for
testing the code.
</code></pre>

You're welcome.

blocks|key|1380786|text|只需使用set将您的输入设置为位置参数，并以三个为一组进行处理。这样你就不需要任何花哨的或者特定于bash的东西了：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1380787|line="I+am+writing+this+line+for+testing+the+code."

set+junk+$line
shift
while+[+$#+-ge+3+];+do
++echo+"Three+words:+$1+$2+$3"
++shift+3
done|code-block|syntax|javascript|1380788|entityMap^0|4|3|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

Just use <code>set</code> to set your input as positional arguments, and process them in groups of three. That way you don't need anything fancy or bash-specific:

<pre><code>line="I am writing this line for testing the code."

set junk $line
shift
while [ $# -ge 3 ]; do
 echo "Three words: $1 $2 $3"
 shift 3
done
</code></pre>

blocks|key|3104743|text|有一个非通用的直接解决方案：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3104744|#!/bin/bash
path_to_file=$1
while+read+line
do
counter=1;
++++for+word+in+$line
++++do
++++++++echo+-n+$word"+";
++++if+(($counter+%25+3+==+0))
++++++then
++++++++echo+"";
++++fi
++++let+counter=counter%2B1;
++++done
done+<+${path_to_file}|code-block|syntax|javascript|3104745|将其保存在脚本中，为其命名(例如test.sh)，并将其设置为执行模式。然后如果你的文本保存在"myfile.txt“中，就像这样调用它：|3104746|test.sh+myfile.txt|3104747|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

There's a non-generic straight forward solution: 

<pre><code>#!/bin/bash
path_to_file=$1
while read line
do
counter=1;
 for word in $line
 do
 echo -n $word" ";
 if (($counter % 3 == 0))
 then
 echo "";
 fi
 let counter=counter+1;
 done
done &lt; ${path_to_file}
</code></pre>

Save that in a script, give it a name (test.sh for example) and set it to execution mode. Than if your text is saved in "myfile.txt" call it like this:

<pre><code>test.sh myfile.txt
</code></pre>

blocks|key|1380697|text|这是一个可能的解决方案的示例。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1380698|#!/bin/bash

line="I+am+writing+this+line+for+testing+the+code."


i=0
for+word+in+$line;+do
++++((%2B%2Bi))
++++if+[[+$i+-eq+3+]];+then
++++++++i=0
++++++++echo+"$word"
++++else
++++++++echo+-ne+"$word+"
++++fi
done|code-block|syntax|javascript|1380699|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|$]]

Here's an example of possible solution.

<pre><code>#!/bin/bash

line="I am writing this line for testing the code."


i=0
for word in $line; do
 ((++i))
 if [[ $i -eq 3 ]]; then
 i=0
 echo "$word"
 else
 echo -ne "$word "
 fi
done
</code></pre>

I would like to split a line into words. I know this can be done with this

<pre><code>For word in $line; do echo $word; done 
</code></pre>

But I want to make group of 3-3 words. So my question is, how can I split a line in group of 3-3 words ?

For example

<pre><code>Input : I am writing this line for testing the code. 

Output : 
I am writing
this line for
testing the code. 
</code></pre>

Splitting a line into words in bash

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我想把一行分成几个词。我知道这是可以做到的For word in $line; do echo $word; done  但是我想做一个3-3个单词的组。所以我的问题是，我如何将一行分成3-3个单词的组？例如Input : I am writing this line for testing the code.  Output :  I am writingthis line fortesting

问在bash中将一行拆分成单词
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回答 7

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问在bash中将一行拆分成单词EN

回答 7

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问在bash中将一行拆分成单词
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