BASH-随机播放文件中字符串中的字符 [英] BASH - Shuffle characters in strings from file

问题描述

我有一个具有以下结构的文件(filename.txt):

I have a file (filename.txt) with the following structure:

>line1
ABC
>line2
DEF
>line3
GHI
>line4
JKL

我想对不以>开头的字符串中的字符进行混洗.输出(例如)如下所示:

I would like to shuffle the characters in the strings that do not start wit >. The output would (for example) look like the following:

>line1
BCA
>line2
DFE
>line3
IHG
>line4
KLJ

这是我尝试将字符串中的字符随机播放的内容:sed 's/./&\n/' | shuf | tr -d "\n".看起来好像可行，但没有考虑换行符.而且，它对所有数据执行命令，不仅对不以>开头的行执行命令.

This is what I tried to shuffle the characters in a string: sed 's/./&\n/' | shuf | tr -d "\n" . It looks like it works but it does not take into account newlines. Moreover it executes the command on all data and not only on lines that do not start with >.

推荐答案

使用perl和ruby

$ # split// to get individual characters
$ # join "" to join characters with empty string
$ # if !/^>/ to apply the change only for lines not starting with >
$ # alternate: perl -MList::Util=shuffle -lne 'print /^>/ ? $_ : shuffle split//'
$ perl -MList::Util=shuffle -lpe '$_=join "", shuffle split// if !/^>/' ip.txt 
>line1
CBA
>line2
FED
>line3
IHG
>line4
JKL

$ # $_.chars to get individual characters
$ # * "" to join array elements with empty string
$ ruby -lpe '$_ = $_.chars.shuffle * "" if !/^>/' ip.txt 
>line1
BAC
>line2
EDF
>line3
GHI
>line4
JKL

这篇关于BASH-随机播放文件中字符串中的字符的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！