regex

问题 How can I simplify this PostgreSQL? Basically I want to check if the fields end with (1) or just (1) and replace and repeat from numbers from 1-30. I assume it can be done with regular expressions somehow, but I haven't got it working. UPDATE discogs.artist_meta SET name = substr(name,0, strpos(name,' (1)')) WHERE name LIKE '% (1)'; UPDATE discogs.artist_meta SET name = substr(name,0, strpos(name,'(1)')) WHERE name LIKE '%(1)'; UPDATE discogs.artist_meta SET name = substr(name,0, strpos(name,

问题 I have a table such as the below Name firstname lastname FirstName Lastname firstName Lastname FirstName lastname I am trying to capitalize each letter of the firstname and lastname to be Firstname Lastname in all the 4 cases. Any recommendations on the query without using the CAP_FIRST function? Can I use regex? 回答1: This is a query that works: SELECT CONCAT( UPPER(SUBSTRING(Name,1,1)), LOWER(SUBSTRING(Name,2,Locate(' ', Name)-1)), UPPER(SUBSTRING(Name,Locate(' ', Name)+1,1)), LOWER

问题 I have a textfile called netlist.txt with the following contents: M1 nmos1 M2 nmos2 P1 pmos1 M3 nmos3 M4 nmos4 P2 pmos2 I want to retrieve only the line which starts with a tab/space and matching all the "M" values that are indented, using regex. In order to accomplish this I entered the following expression in bash: egrep [:space:]*[M][0-9]+ netlist.txt But it doesn't recognize the space. It retrieves all the lines regardless of having a space or not. Please give me some advice on this.

问题 I am trying to capture words following specified stocks in a pandas df. I have several stocks in the format $IBM and am setting a python regex pattern to search each tweet for 3-5 words following the stock if found. My df called stock_news looks as such: Word Count 0 $IBM 10 1 $GOOGL 8 etc pattern = '' for word in stock_news.Word: pattern += '{} (\w+\s*\S*){3,5}|'.format(re.escape(word)) However my understanding is that {} should be a quantifier, in my case matching between 3 to 5 times

问题 How can I simplify this PostgreSQL? Basically I want to check if the fields end with (1) or just (1) and replace and repeat from numbers from 1-30. I assume it can be done with regular expressions somehow, but I haven't got it working. UPDATE discogs.artist_meta SET name = substr(name,0, strpos(name,' (1)')) WHERE name LIKE '% (1)'; UPDATE discogs.artist_meta SET name = substr(name,0, strpos(name,'(1)')) WHERE name LIKE '%(1)'; UPDATE discogs.artist_meta SET name = substr(name,0, strpos(name,

问题 I am trying to capture words following specified stocks in a pandas df. I have several stocks in the format $IBM and am setting a python regex pattern to search each tweet for 3-5 words following the stock if found. My df called stock_news looks as such: Word Count 0 $IBM 10 1 $GOOGL 8 etc pattern = '' for word in stock_news.Word: pattern += '{} (\w+\s*\S*){3,5}|'.format(re.escape(word)) However my understanding is that {} should be a quantifier, in my case matching between 3 to 5 times

问题 I have a variable device='A/B/C/X1' that is commented out in another file. There can be multiple instances of the same device such as 'A/B/C/X1@1' , ..@2 and so on. All of these devices are commented out in another file with a prefix * . I want to remove the * but not affect similar devices like 'A/B/C/X**10**' . I tried using regex to simply substitute a pattern using the following line of code, but I'm getting an InvalidExpression error. line=re.sub('^*'+device+'@',device+'@',line) Please

问题 I have a variable device='A/B/C/X1' that is commented out in another file. There can be multiple instances of the same device such as 'A/B/C/X1@1' , ..@2 and so on. All of these devices are commented out in another file with a prefix * . I want to remove the * but not affect similar devices like 'A/B/C/X**10**' . I tried using regex to simply substitute a pattern using the following line of code, but I'm getting an InvalidExpression error. line=re.sub('^*'+device+'@',device+'@',line) Please

问题 I have a regular expression of the following in Javascript: /\w{1,}\s*\w{1,}/ This checks if a string has atleast two words greater than 1 character each. Ex- asd fgh - Valid a b d dfd - Valid xscxs - Invalid I now have a new requirement that I have tried to implement, but cannot get right. New requirement: Be able to have a comma separated list of the same type of input as before. Cannot end with a comma. Each item must be valid per the rules above. If there are no comma then also its valid.

问题 It must be really easy, but somehow I don't get it… I want to process an HTML-file via a bash script and insert an HTML-String into a certain node: org.html: <div id="wrapper"></div> MYTEXT=$(phantomjs capture.js www.somesite.com) # MYTEXT will look something like this: # <div id="test" style="top: -1.9%;">Something</div> sed -i "s/\<div id=\"wrapper\"\>/\<div id=\"wrapper\"\>$MYTEXT/" org.html I always get this error: bad flag in substitute command: 'd' which is probably because sed