#regex-greedy

Fixed: Non greedy regex matching in sed? #it #programming #answer

Non greedy regex matching in sed?

I’m trying to use sed to clean up lines of URLs to extract just the domain..

So from:

http://www.suepearson.co.uk/product/174/71/3816/

I want:

http://www.suepearson.co.uk/

(either with or without the trainling slash, it doesn’t matter)

I have tried:

sed 's|\(http:\/\/.*?\/\).*|\1|'

and (escaping the non greedy quantifier)

sed 's|\(http:\/\/.*\?\/\).*|\1|'

bu…

How to: Greedy vs. Reluctant vs. Possessive Quantifiers

Greedy vs. Reluctant vs. Possessive Quantifiers

I found this excellent tutorial on regular expressions and while I intuitively understand what “greedy”, “reluctant” and “possessive” quantifiers do, there seems to be a serious hole in my understanding.

Specifically, in the following example:

Enter your regex: .*foo // greedy quantifier Enter input string to search: xfooxxxxxxfoo I found the text…

Fixed How can I make my match non greedy in vim? #dev #it #asnwer

How can I make my match non greedy in vim?

I have a big HTML file that has lots of markup that looks like this:

<p class="MsoNormal" style="margin: 0in 0in 0pt;"> <span style="font-size: small; font-family: Times New Roman;">stuff here</span> </p>

I’m trying to do a Vim search-and-replace to get rid of all class="" and style="" but I’m having trouble making the match ungreedy.

My first attempt…

How to: Non greedy regex matching in sed?

Non greedy regex matching in sed?

I’m trying to use sed to clean up lines of URLs to extract just the domain..

So from:

http://www.suepearson.co.uk/product/174/71/3816/

I want:

http://www.suepearson.co.uk/

(either with or without the trainling slash, it doesn’t matter)

I have tried:

sed 's|\(http:\/\/.*?\/\).*|\1|'

and (escaping the non greedy quantifier)

sed 's|\(http:\/\/.*\?\/\).*|\1|'

bu…

How to: How can I make my match non greedy in vim?

How can I make my match non greedy in vim?

I have a big HTML file that has lots of markup that looks like this:

<p class="MsoNormal" style="margin: 0in 0in 0pt;"> <span style="font-size: small; font-family: Times New Roman;">stuff here</span> </p>

I’m trying to do a Vim search-and-replace to get rid of all class="" and style="" but I’m having trouble making the match ungreedy.

My first attempt…