Right now I have this code:
#category.name.gsub(' ', '-').gsub('--','-').gsub('--','-')
What id does:
If I have category with name sometext sometext, it will change all space charactes to - dash characters. sometext-someteext ( I use this for url building)
.gsub('--','-').gsub('--','-') - this part I need for the case when name is something like
sometext - sometext so without this part my method will give me wrong output like sometext---sometext
So what is a more elegant way to rewrite that 3 gsubs into one?
Regex to the rescue:
.gsub(/ \-+ /, ' - ')
ActiveSupport::Inflector contains parameterize which is a more general for building urls.
> 'sometext - sometext'.parameterize
=> "sometext-sometext"
Related
So, I have a string like this:
str1 = "blablablabla... original_url=\"https://facebook.com/125642\"> ... blablablabla..."
what is the best approach to extract this original_url?
what I have done so far is this:
original_url = str1['content'][str1['content'].index('original_url')+12..str1['content'].index('>')-2]
it works, but it seems such like a poor solution, mostly I'm stuggling to find this substring /">
here's what I have tried so far
str1.index('\">')
str1.index('\\">') # escaping only one backslach
str1.index('\\\">') # escaping both back slash and "
str1.index("\\\">") # was just without idea over here
I'm not a ruby programmer, so I'm kinda lost here
The best approach to parse xml namespaces is to use Nokogiri as suggested by #spickermann.
Quick but not elegant and not even efficient solutions:
str1 = "blablablabla... original_url=\"https://facebook.com/125642\"> ... blablablabla..."
original_url=str1[str1.index("original_url")+14...str1.index("\">")]
# => "https://facebook.com/125642"
original_url=str1.split(/original_url=\"/)[1].split(/">/).first
# => "https://facebook.com/125642"
Is it possible to do something like this th:attr="some-data=${#strings.replace(#strings.toLowerCase(object), '\\s', '-')} - if so, is there a shorter way to do this? Thanks.
That type of text manipulation is possible ... without the regex-expression (I think the problem with regex here is that thymleaf escapes the expression):
"${#strings.replace(#strings.toLowerCase(object), ' ', '-')}"
if you want to set a custom-attribute 'some-data' you can use:
th:attr="some-data=${#strings.replace(#strings.toLowerCase(object), ' ', '-')}"
or a little bit shorter for newer versions of tymeleaf:
th:some-data="${#strings.replace(#strings.toLowerCase(object), ' ', '-')}
Super Simple. Only issues I find are people getting null. Which I obvi fixed. But where is the backslash???!!
params.me = '#HttpContext.Current.User.Identity.Name';
This returns
"domainUserName" <- Browser
"domain\\UserName" <- Debugging
What I expect is
"domain\UserName" <- Browser
Any ideas?
Based on your comments you are using the following code to show the user name:
alert('#HttpContext.Current.User.Identity.Name');
#HttpContext.Current.User.Identity.Nameis a string that can contain "\" backslash character. This character is considered as a escape character in javascript as it is in C# as well.
You need to escape the "\" character in the string before passing it to Javascript like that:
alert('#HttpContext.Current.User.Identity.Name.Replace("\\", "\\\\")')
I'm using stringscanner on my request URL in order to get the name of the user's currently selected category, but I've been having difficulty dealing with spaces and special characters.
request.url.scan(/\?category=\w+/).to_s.gsub('?category=', '')
URL examples followed by result
http://localhost:3000/search?category=dog&search=&utf8=%E2%9C%93 => ["dog"]
http://localhost:3000/search?category=dog.com&search=&utf8=%E2%9C%93 => ["dog"]
http://localhost:3000/search?category=dog+cat&search=&utf8=%E2%9C%93 => ["dog"]
I'm trying to get ["dog"] ["dog.com"] and ["dog cat"], but am currently stuck. Any ideas?
Note: Considering removing spaces from categories and replacing them with dashes as multiple spaces could be problematic, but if it's possible to create one function to rule them all, that would be awesome.
This is Rails, is there a reason you're not just using params[:category]?
If you are trying to extract params then you could use parse_query :
uri = "http://localhost:3000/search?category=dog+cat&search=&utf8=%E2%9C%93"
result = Rack::Utils.parse_query(URI(uri).query) #=> {"category"=>"dog cat", "search"=>"", "utf8"=>"\xE2\x9C\x93"}
result["category"] #=> dog cat
I'm trying to create a BBcode [code] tag for my rails forum, and I have a problem with the expression:
param_string.gsub!( /\[code\](.*?)\[\/code\]/im, '<pre>\1</pre>' )
How do I get what the regex match returns (the text inbetween the [code][/code] tags), and escape all the html and some other characters in it?
I've tried this:
param_string.gsub!( /\[code\](.*?)\[\/code\]/im, '<pre>' + my_escape_function('\1') + '</pre>' )
but it didn't work. It just passes "\1" as a string to the function.
You should take care of the greedy behavior of the regular expressions. So the correct code looks like this:
html.gsub!(/\[(\S*?)\](.*?)\[\/\1\]/) { |m| escape_method($1, $2) }
The escape_method then looks like this:
def escape_method( type, string )
case type.downcase
when 'code'
"<pre>#{string}</pre>"
when 'bold'
"<b>#{string}</b>"
else
string
end
end
Someone here posted an answer, but they've deleted it.
I've tried their suggestion, and made it work with a small change. Whoever you are, thanks! :)
Here it is
param_string.gsub!( /\[code\](.*?)\[\/code\]/im ) {|s| '<pre>' + my_escape_function(s) + '</pre>' }
You can simply use "<pre>#{$1}</pre>" for your replacement value.