Less ugly way to use sed to simply include a new line?












-1















There are a lot of guides, handbooks, fast-guides, question/answers about it: no one are simple and objective...



It is a classical problem, near all text editors crashes with big files XML or HTML "all in one line", so we need to decide what tag will recive the n and replace all occurences of <tag by n<tag ... so simple. Why it is not simple to do by terminal?



The best question/answer about this case not solves: Bash: How can I replace a string by new line in osx bash?
Example using that solution: sed 's/<article/'$'nn<article/g' file.htm not works, need some more exotical syntax, so it is not simple as I solicitated in this question.



So, this quetion is not about "any solution", but about "some simple/elegant solution".






sed







share|improve this question

























  • What have you tried? How did it fail?

    – choroba
    Nov 23 '18 at 13:53











  • perl -pe 's/(string)/n$1/' input

    – William Pursell
    Nov 23 '18 at 13:54











  • Hi @choroba, sorry, now including an example of sed command.

    – Peter Krauss
    Nov 23 '18 at 13:54






  • 1





    sed has solutions, but there are many implementations of sed and not all permit the simple solution. Improving sed was one of the motivations for perl.

    – William Pursell
    Nov 23 '18 at 14:51






  • 1





    Your solution sed 's/<article/'$'nn<article/g' file.htm is half right, a clearer way to view this is to replace 'sed commands' by $'sed commands'. Thus all quoted characters (by which I mean character preceeded by a back slash) must also be quoted. Which is a long way of saying, try this: sed $'s/<article/\n\n<article/g' file.htm

    – potong
    Nov 23 '18 at 18:25
















-1















There are a lot of guides, handbooks, fast-guides, question/answers about it: no one are simple and objective...



It is a classical problem, near all text editors crashes with big files XML or HTML "all in one line", so we need to decide what tag will recive the n and replace all occurences of <tag by n<tag ... so simple. Why it is not simple to do by terminal?



The best question/answer about this case not solves: Bash: How can I replace a string by new line in osx bash?
Example using that solution: sed 's/<article/'$'nn<article/g' file.htm not works, need some more exotical syntax, so it is not simple as I solicitated in this question.



So, this quetion is not about "any solution", but about "some simple/elegant solution".






sed







share|improve this question

























  • What have you tried? How did it fail?

    – choroba
    Nov 23 '18 at 13:53











  • perl -pe 's/(string)/n$1/' input

    – William Pursell
    Nov 23 '18 at 13:54











  • Hi @choroba, sorry, now including an example of sed command.

    – Peter Krauss
    Nov 23 '18 at 13:54






  • 1





    sed has solutions, but there are many implementations of sed and not all permit the simple solution. Improving sed was one of the motivations for perl.

    – William Pursell
    Nov 23 '18 at 14:51






  • 1





    Your solution sed 's/<article/'$'nn<article/g' file.htm is half right, a clearer way to view this is to replace 'sed commands' by $'sed commands'. Thus all quoted characters (by which I mean character preceeded by a back slash) must also be quoted. Which is a long way of saying, try this: sed $'s/<article/\n\n<article/g' file.htm

    – potong
    Nov 23 '18 at 18:25














-1












-1








-1


1






There are a lot of guides, handbooks, fast-guides, question/answers about it: no one are simple and objective...



It is a classical problem, near all text editors crashes with big files XML or HTML "all in one line", so we need to decide what tag will recive the n and replace all occurences of <tag by n<tag ... so simple. Why it is not simple to do by terminal?



The best question/answer about this case not solves: Bash: How can I replace a string by new line in osx bash?
Example using that solution: sed 's/<article/'$'nn<article/g' file.htm not works, need some more exotical syntax, so it is not simple as I solicitated in this question.



So, this quetion is not about "any solution", but about "some simple/elegant solution".






sed







share|improve this question
















There are a lot of guides, handbooks, fast-guides, question/answers about it: no one are simple and objective...



It is a classical problem, near all text editors crashes with big files XML or HTML "all in one line", so we need to decide what tag will recive the n and replace all occurences of <tag by n<tag ... so simple. Why it is not simple to do by terminal?



The best question/answer about this case not solves: Bash: How can I replace a string by new line in osx bash?
Example using that solution: sed 's/<article/'$'nn<article/g' file.htm not works, need some more exotical syntax, so it is not simple as I solicitated in this question.



So, this quetion is not about "any solution", but about "some simple/elegant solution".






sed




sed






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 23 '18 at 14:01







Peter Krauss

















asked Nov 23 '18 at 13:50









Peter KraussPeter Krauss

5,3051081169




5,3051081169













  • What have you tried? How did it fail?

    – choroba
    Nov 23 '18 at 13:53











  • perl -pe 's/(string)/n$1/' input

    – William Pursell
    Nov 23 '18 at 13:54











  • Hi @choroba, sorry, now including an example of sed command.

    – Peter Krauss
    Nov 23 '18 at 13:54






  • 1





    sed has solutions, but there are many implementations of sed and not all permit the simple solution. Improving sed was one of the motivations for perl.

    – William Pursell
    Nov 23 '18 at 14:51






  • 1





    Your solution sed 's/<article/'$'nn<article/g' file.htm is half right, a clearer way to view this is to replace 'sed commands' by $'sed commands'. Thus all quoted characters (by which I mean character preceeded by a back slash) must also be quoted. Which is a long way of saying, try this: sed $'s/<article/\n\n<article/g' file.htm

    – potong
    Nov 23 '18 at 18:25



















  • What have you tried? How did it fail?

    – choroba
    Nov 23 '18 at 13:53











  • perl -pe 's/(string)/n$1/' input

    – William Pursell
    Nov 23 '18 at 13:54











  • Hi @choroba, sorry, now including an example of sed command.

    – Peter Krauss
    Nov 23 '18 at 13:54






  • 1





    sed has solutions, but there are many implementations of sed and not all permit the simple solution. Improving sed was one of the motivations for perl.

    – William Pursell
    Nov 23 '18 at 14:51






  • 1





    Your solution sed 's/<article/'$'nn<article/g' file.htm is half right, a clearer way to view this is to replace 'sed commands' by $'sed commands'. Thus all quoted characters (by which I mean character preceeded by a back slash) must also be quoted. Which is a long way of saying, try this: sed $'s/<article/\n\n<article/g' file.htm

    – potong
    Nov 23 '18 at 18:25

















What have you tried? How did it fail?

– choroba
Nov 23 '18 at 13:53





What have you tried? How did it fail?

– choroba
Nov 23 '18 at 13:53













perl -pe 's/(string)/n$1/' input

– William Pursell
Nov 23 '18 at 13:54





perl -pe 's/(string)/n$1/' input

– William Pursell
Nov 23 '18 at 13:54













Hi @choroba, sorry, now including an example of sed command.

– Peter Krauss
Nov 23 '18 at 13:54





Hi @choroba, sorry, now including an example of sed command.

– Peter Krauss
Nov 23 '18 at 13:54




1




1





sed has solutions, but there are many implementations of sed and not all permit the simple solution. Improving sed was one of the motivations for perl.

– William Pursell
Nov 23 '18 at 14:51





sed has solutions, but there are many implementations of sed and not all permit the simple solution. Improving sed was one of the motivations for perl.

– William Pursell
Nov 23 '18 at 14:51




1




1





Your solution sed 's/<article/'$'nn<article/g' file.htm is half right, a clearer way to view this is to replace 'sed commands' by $'sed commands'. Thus all quoted characters (by which I mean character preceeded by a back slash) must also be quoted. Which is a long way of saying, try this: sed $'s/<article/\n\n<article/g' file.htm

– potong
Nov 23 '18 at 18:25





Your solution sed 's/<article/'$'nn<article/g' file.htm is half right, a clearer way to view this is to replace 'sed commands' by $'sed commands'. Thus all quoted characters (by which I mean character preceeded by a back slash) must also be quoted. Which is a long way of saying, try this: sed $'s/<article/\n\n<article/g' file.htm

– potong
Nov 23 '18 at 18:25












1 Answer
1






active

oldest

votes


















1














If I understand what you are looking for you could try something like the following:



sed 's/<tag>/n<tag>/g' file.htm



which is very close to the anwser you linked.
It already looks quite simple to me, it replaces the tag with a new line character and writes the tag again.
However I don't get the need for this '$' in your case.






share|improve this answer


























  • YES! My first use was sed '/<tag/nn<tag/g' file that generated an error and my looking for guides... Why sometimes we need s/ and sometimes not with sed ?

    – Peter Krauss
    Nov 23 '18 at 14:04













  • s stands for substitution. From the sed man page: s/regexp/replacement/ Attempt to match regexp against the pattern space. If successful, replace that portion matched with replacement. ...

    – matteo martelli
    Nov 23 '18 at 14:06













  • @PeterKrauss, please consider to accept the answer if you think it's correct and suits your issue. Thanks

    – matteo martelli
    Nov 23 '18 at 14:11








  • 2





    Patterns without the leading s are searches to decide which lines to act on. s/// is an action. so sed '/foo/ s/bar/bye/g' means "only replace bar with bye on lines that have a foo." GNU has a great manual here.

    – Paul Hodges
    Nov 23 '18 at 14:17








  • 1





    Be careful: this solution does not work in all implementations of sed.

    – William Pursell
    Nov 23 '18 at 14:50











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1














If I understand what you are looking for you could try something like the following:



sed 's/<tag>/n<tag>/g' file.htm



which is very close to the anwser you linked.
It already looks quite simple to me, it replaces the tag with a new line character and writes the tag again.
However I don't get the need for this '$' in your case.






share|improve this answer


























  • YES! My first use was sed '/<tag/nn<tag/g' file that generated an error and my looking for guides... Why sometimes we need s/ and sometimes not with sed ?

    – Peter Krauss
    Nov 23 '18 at 14:04













  • s stands for substitution. From the sed man page: s/regexp/replacement/ Attempt to match regexp against the pattern space. If successful, replace that portion matched with replacement. ...

    – matteo martelli
    Nov 23 '18 at 14:06













  • @PeterKrauss, please consider to accept the answer if you think it's correct and suits your issue. Thanks

    – matteo martelli
    Nov 23 '18 at 14:11








  • 2





    Patterns without the leading s are searches to decide which lines to act on. s/// is an action. so sed '/foo/ s/bar/bye/g' means "only replace bar with bye on lines that have a foo." GNU has a great manual here.

    – Paul Hodges
    Nov 23 '18 at 14:17








  • 1





    Be careful: this solution does not work in all implementations of sed.

    – William Pursell
    Nov 23 '18 at 14:50
















1














If I understand what you are looking for you could try something like the following:



sed 's/<tag>/n<tag>/g' file.htm



which is very close to the anwser you linked.
It already looks quite simple to me, it replaces the tag with a new line character and writes the tag again.
However I don't get the need for this '$' in your case.






share|improve this answer


























  • YES! My first use was sed '/<tag/nn<tag/g' file that generated an error and my looking for guides... Why sometimes we need s/ and sometimes not with sed ?

    – Peter Krauss
    Nov 23 '18 at 14:04













  • s stands for substitution. From the sed man page: s/regexp/replacement/ Attempt to match regexp against the pattern space. If successful, replace that portion matched with replacement. ...

    – matteo martelli
    Nov 23 '18 at 14:06













  • @PeterKrauss, please consider to accept the answer if you think it's correct and suits your issue. Thanks

    – matteo martelli
    Nov 23 '18 at 14:11








  • 2





    Patterns without the leading s are searches to decide which lines to act on. s/// is an action. so sed '/foo/ s/bar/bye/g' means "only replace bar with bye on lines that have a foo." GNU has a great manual here.

    – Paul Hodges
    Nov 23 '18 at 14:17








  • 1





    Be careful: this solution does not work in all implementations of sed.

    – William Pursell
    Nov 23 '18 at 14:50














1












1








1







If I understand what you are looking for you could try something like the following:



sed 's/<tag>/n<tag>/g' file.htm



which is very close to the anwser you linked.
It already looks quite simple to me, it replaces the tag with a new line character and writes the tag again.
However I don't get the need for this '$' in your case.






share|improve this answer















If I understand what you are looking for you could try something like the following:



sed 's/<tag>/n<tag>/g' file.htm



which is very close to the anwser you linked.
It already looks quite simple to me, it replaces the tag with a new line character and writes the tag again.
However I don't get the need for this '$' in your case.







share|improve this answer














share|improve this answer



share|improve this answer








edited Nov 23 '18 at 14:04

























answered Nov 23 '18 at 14:00









matteo martellimatteo martelli

764




764













  • YES! My first use was sed '/<tag/nn<tag/g' file that generated an error and my looking for guides... Why sometimes we need s/ and sometimes not with sed ?

    – Peter Krauss
    Nov 23 '18 at 14:04













  • s stands for substitution. From the sed man page: s/regexp/replacement/ Attempt to match regexp against the pattern space. If successful, replace that portion matched with replacement. ...

    – matteo martelli
    Nov 23 '18 at 14:06













  • @PeterKrauss, please consider to accept the answer if you think it's correct and suits your issue. Thanks

    – matteo martelli
    Nov 23 '18 at 14:11








  • 2





    Patterns without the leading s are searches to decide which lines to act on. s/// is an action. so sed '/foo/ s/bar/bye/g' means "only replace bar with bye on lines that have a foo." GNU has a great manual here.

    – Paul Hodges
    Nov 23 '18 at 14:17








  • 1





    Be careful: this solution does not work in all implementations of sed.

    – William Pursell
    Nov 23 '18 at 14:50



















  • YES! My first use was sed '/<tag/nn<tag/g' file that generated an error and my looking for guides... Why sometimes we need s/ and sometimes not with sed ?

    – Peter Krauss
    Nov 23 '18 at 14:04













  • s stands for substitution. From the sed man page: s/regexp/replacement/ Attempt to match regexp against the pattern space. If successful, replace that portion matched with replacement. ...

    – matteo martelli
    Nov 23 '18 at 14:06













  • @PeterKrauss, please consider to accept the answer if you think it's correct and suits your issue. Thanks

    – matteo martelli
    Nov 23 '18 at 14:11








  • 2





    Patterns without the leading s are searches to decide which lines to act on. s/// is an action. so sed '/foo/ s/bar/bye/g' means "only replace bar with bye on lines that have a foo." GNU has a great manual here.

    – Paul Hodges
    Nov 23 '18 at 14:17








  • 1





    Be careful: this solution does not work in all implementations of sed.

    – William Pursell
    Nov 23 '18 at 14:50

















YES! My first use was sed '/<tag/nn<tag/g' file that generated an error and my looking for guides... Why sometimes we need s/ and sometimes not with sed ?

– Peter Krauss
Nov 23 '18 at 14:04







YES! My first use was sed '/<tag/nn<tag/g' file that generated an error and my looking for guides... Why sometimes we need s/ and sometimes not with sed ?

– Peter Krauss
Nov 23 '18 at 14:04















s stands for substitution. From the sed man page: s/regexp/replacement/ Attempt to match regexp against the pattern space. If successful, replace that portion matched with replacement. ...

– matteo martelli
Nov 23 '18 at 14:06







s stands for substitution. From the sed man page: s/regexp/replacement/ Attempt to match regexp against the pattern space. If successful, replace that portion matched with replacement. ...

– matteo martelli
Nov 23 '18 at 14:06















@PeterKrauss, please consider to accept the answer if you think it's correct and suits your issue. Thanks

– matteo martelli
Nov 23 '18 at 14:11







@PeterKrauss, please consider to accept the answer if you think it's correct and suits your issue. Thanks

– matteo martelli
Nov 23 '18 at 14:11






2




2





Patterns without the leading s are searches to decide which lines to act on. s/// is an action. so sed '/foo/ s/bar/bye/g' means "only replace bar with bye on lines that have a foo." GNU has a great manual here.

– Paul Hodges
Nov 23 '18 at 14:17







Patterns without the leading s are searches to decide which lines to act on. s/// is an action. so sed '/foo/ s/bar/bye/g' means "only replace bar with bye on lines that have a foo." GNU has a great manual here.

– Paul Hodges
Nov 23 '18 at 14:17






1




1





Be careful: this solution does not work in all implementations of sed.

– William Pursell
Nov 23 '18 at 14:50





Be careful: this solution does not work in all implementations of sed.

– William Pursell
Nov 23 '18 at 14:50


















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