Delete regex phrase from text

Question

I have a text with news where i got html attributes that i don't need. How can i delete phrases in ruby such as

img width="750" alt="4.jg" c="/unload/medialiy/df6/4.jg" height="499" title=4.jg"

img width="770" alt="5.jg" c="/unload/medialiy/ty6/5.jg" height="499" title=5.jg"

So i need some regex smth like news.sub('/img*jg"/, ''). but it doesn't work.

"a text with news where i got html attributes" – what does that mean? Do you have HTML or text containing HTML? Why are the angle brackets missing? How does your actual input look like (i.e. news) and what is your expected output? — Stefan
– Stefan, Commented Sep 11, 2017 at 11:34

Gangnus · Accepted Answer · 2017-09-12 14:15:00Z

1

I would use:

img .*\.jg"

test

if you want to say in regex "any symbols in any quantity", use .* Dot means any symbol, and star - any quantity.

But are you sure you don't want to include angle braces?

<img .*\.jg">

As an aside, what if the order of attributes will be changed? Then you'll fail to match the img tag. We really need img tag with .jg" substring in it.

<img [^>]*\.jg"[^>]*>

test

edited Sep 12, 2017 at 14:15

answered Sep 11, 2017 at 11:14

Gangnus

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2 Comments

Stefan Over a year ago

"Dot means any symbol" – are you sure that you want .jg then? ;-)

Gangnus Over a year ago

Oh! How foolish of me to omit back slashes! Practically, it was a longer substitution for '.?'. It was a correct regex, so tests passed, but not good for explanation, thank you!

Psylone · Accepted Answer · 2017-09-11 11:25:13Z

0

In your particular case you can do this:

element = '<img width="750" alt="4.jg" c="/unload/medialiy/df6/4.jg" height="499" title="4.jg">'

puts element.gsub(/(width|alt)=\"[^ ]+\" ?/, '')

You can also play around with this regex here.

But if you need a more robust solution, try to take a look at the Nokogiri gem. This SO question can help.

edited Sep 11, 2017 at 11:25

answered Sep 11, 2017 at 11:14

Psylone

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