bash 如何使用 AWK 或 Sed 在 x 个单词后插入换行符 \n
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how to insert a newline \n after x numbers of words, with AWK or Sed
提问by user2275669
I have this in one line:
我在一行中有这个：
We were born in the earth beyond the land
I want it in 3 words lines, to be like this:
我希望它在 3 个字的行中，是这样的：
We were born
in the earth
beyond the land
回答by Chris Seymour
$ xargs -n3 < file
We were born
in the earth
beyond the land
$ egrep -o '\S+\s+\S+\s+\S+' file
We were born
in the earth
beyond the land
回答by Birei
Using awk:
使用awk：
awk '{
for ( i = 1; i <= NF; i++ ) {
printf "%s%c", $i, (i % 3 == 0) ? ORS : OFS
}
}' infile
It yields:
它产生：
We were born
in the earth
beyond the land
回答by perreal
With GNU sed:
使用 GNU sed：
sed 's/\(\w\w*\W*\w\w*\W*\w\w*\W*\)/\n/g' input
and short version:
和简短版本：
sed 's/\(\(\w\w*\W*\)\{3\}\)/\n/g' input
回答by William
Here's one sed solution:
这是一个 sed 解决方案：
sed -e 's/\s/\n/3;s/\s/\n/6;s/\s/\n/9'
It replaces the third, sixth and ninth spaces with newlines.
它用换行符替换第三、第六和第九个空格。
This one will handle longer lines, even if they aren't multiples of three words:
这个将处理更长的行，即使它们不是三个单词的倍数：
sed -e 's/\(\(\S\{1,\}\s*\)\{3\}\)/\n/g'
回答by Magnus
Any system that has awk and sed will almost certainly also have Perl:
任何具有 awk 和 sed 的系统几乎肯定也会有 Perl：
cat myfile.txt | perl -lane 'while(($a,$b,$c) = splice(@F,0,3)){print "$a $b $c"}'
