You have the following list:<\/p>\n
Firstline\r\nSecondline\r\nThirdline\r\nFourthline\r\nFifthline\r\nSixthline<\/pre>\nYou want to turn it into something that looks like this:<\/p>\n
\r\nFirstline,Secondline,Thirdline,Fourthline,Fifthline,Sixthline<\/pre>\nAll you have is a stick of bubble gum, a broken lightbulb, and a bash shell with the usual tools installed. How would you do it?<\/p>\n
Here are a few suggestions.<\/p>\n
\r\nperl -pi.bak -e 'unless(eof){s\/\\n\/,\/g}' textfile\r\n<\/pre>\nThis will produce a backup called textfile.bak and modify the original file.<\/p>\n
A rather involved sed one liner could do it:<\/p>\n
\r\nsed -n 's\/.*\/&,\/;H;$x;$s\/,\\n\/,\/g;$s\/\\n\\(.*\\)\/\\1\/;$s\/\\(.*\\),\/\\1\/;$p'\r\n<\/pre>\nUsing tr:<\/p>\n
\r\ncat textfile | tr '\\n' ','\r\n<\/pre>\nThere are numerous other possibilities. Free to make suggestions. Also, how would you reverse the process? <\/p>\n","protected":false},"excerpt":{"rendered":"
You have the following list: Firstline Secondline Thirdline Fourthline Fifthline Sixthline You want to turn it into something that looks like this: Firstline,Secondline,Thirdline,Fourthline,Fifthline,Sixthline All you have is a stick of bubble gum, a broken lightbulb, and a bash shell with the usual tools installed. How would you do it? Here are a few suggestions. perl … Continue reading One liner to turn a column of text into a comma separated list<\/span>