I am using den4b Renamer to rename a lot of files that follow a specific pattern. The program allows me to use RegEx: (https://www.den4b.com/wiki/ReNamer:Regular_Expressions)
I am stuck trying to conjure up an expression for a specific pattern.
My current RegEx:
Expression: ^(com\.)(([\w\s]*\.){0,4})([\w\s]*)$
Replace: \L$1\L$2\u$4
Note: \L and \u transform the sub-expression to upper and lower case as defined in the table below:
Here are a few example strings so you can get an idea of the input:
Android File Transfer.svg
Angular Console.svg
Au.Edu.Uq.Esys.Escript.svg
Avidemux.svg
Blackmagic Fusion8.svg
Broken Sword.svg
Browser360 Beta.svg
Btsync GUI.svg
Buttercup Desktop.svg
Calc.svg
Calibre EBook Edit.svg
Calibre Viewer.svg
Call Of Duty.svg
com.GitHub.Plugarut.Pwned Checker.svg
com.GitHub.Plugarut.Wingpanel Monitor.svg
com.GitHub.Rickybas.Date Countdown.svg
com.GitHub.Spheras.Desktopfolder.svg
com.GitHub.Themix Project.Oomox.svg
com.GitHub.Unrud.Remote Touchpad.svg
com.GitHub.Unrud.Video Downloader.svg
com.GitHub.Weclaw1.Image Roll.svg
com.GitHub.Zelikos.Rannum.svg
com.Gitlab.Miridyan.Mt.svg
com.Inventwithpython.Flippy.svg
com.Neatdecisions.Detwinner.svg
com.Rafaelmardojai.Share Preview.svg
com.Rafaelmardojai.Webfont Kit Generator.svg
Distributor Logo Antix.svg
Distributor Logo Archlabs.svg
Distributor Logo Dragonflybsd.svg
DOSBox.svg
Drawio.svg
Drweb GUI.svg
For this question I am focused on the strings that begin with com.xxx.xxx.
Since I can't only target those names in Renamer, the expression has to "play nice" with the other input file names and correctly leave them alone. That's why I've prefixed my expression with ^(com\.)
What I want:
Transform the entire string to lower case except for the last period separated part of the string.
Strip white space from the entire string.
For instance:
Original: com.GitHub.Alcadica.Develop.svg
After my Regex: com.github.alcadica.Develop.svg
What I want: com.github.alcadica.Develop.svg
This specific file is correctly renamed. What I'm having trouble with are names that have spaces in any part of the string. I can't figure out how to strip whitespace:
Original: com.Belmoussaoui.Read it Later.svg
After my Regex: com.belmoussaoui.Read it Later.svg
What I want: com.belmoussaoui.ReaditLater.svg
Here is a hypothetical example because I couldn't find a file with more than four parts. I want my pattern to be robust enough to handle this:
Original: com.Shatteredpixel.Another Level.Next.Pixel Dungeon.svg
After my Regex: com.shatteredpixel.another level.next.Pixel Dungeon.svg
What I want: com.shatteredpixel.anotherlevel.next.PixelDungeon.svg
Note that since I'm not using any kind of programming language, I don't have access to common string operations like trim, etc. I can, however, stack expressions. But this would create more overhead and since I am renaming thousands of files at a time I'd ideally like to keep it to one find/replace expression.
Any help would be greatly appreciated. Please let me know if I can provide any more information to make this more clear.
Edit:
I got it to work with the following rules:
Really inefficient, but it works. (Thanks to Jeremy in the comments for the idea)
This I probably a dumb question but it beats me.
The same thing in Python works perfectly, although in AS3 doesn't.
var s:String = "123456";
trace(s.split(/../gm));
Expecting this as array: ['12','34','56']
But instead I get: [,,]
I have experimented various regexr patterns but none split into 2-char batches.
Any ideas / solutions ?
You're using the split command, which means the string will be divided into an array of values using the regular expression .. to match the delimiters. These delimiters are then not included in the output.
I think you want to do something like s.match(/../g). See also this link for more information about .match
Whats the best way to remove a query string (the question mark variables) from a image url.
Say I got a good image such as
http://i.ebayimg.com/00/s/MTYwMFgxNjAw/z/zoMAAOSwMpZUniWv/$_12.JPG?set_id=880000500F
But I can't really save it properly without adding a bunch of useless checking code because of the query string crap after it.
I just need
http://i.ebayimg.com/00/s/MTYwMFgxNjAw/z/zoMAAOSwMpZUniWv/$_12.JPG
Looking for the proper regular expression that handles this so I could replace it with blank.
It might be simple enough not to worry about regex.
This would work:
Dim cleaned = url.Substring(0, url.IndexOf("?"c))
First let me say I am college student learning programing so please explain your answer as simply as possible (I’m not real familiar with regular expressions).
What I am trying to do is find some group of text and replace it with the same text but a number appended to the end and continue in this sequence until all of the text matching my search has been replaced.
For example say I have the text “foo*” appearing 100 times in my code. What I want to be able to do is replace “foo*” with “foo1”,”foo2”, “foo3”,….. ,”foo100”
Thanks
You can do this with regular expressions and String's Replace method.
But Regex doesn't have any keyword to continue the sequence.You have to do it yourself!
Regex r=new Regex("foo");
r.Replace("foo hey hello",get100s("foo"));
public string get100s(string inp)
{
string s="";
for(int i=1;i<100;i++)s+=(inp+i);
return s;
}
Instead you can use the Strings's Replace method to the same thing..
s.Replace("foo",get100s("foo"));
I recently discussed editors with a co-worker. He uses one of the less popular editors and I use another (I won't say which ones since it's not relevant and I want to avoid an editor flame war). I was saying that I didn't like his editor as much because it doesn't let you do find/replace with regular expressions.
He said he's never wanted to do that, which was surprising since it's something I find myself doing all the time. However, off the top of my head I wasn't able to come up with more than one or two examples. Can anyone here offer some examples of times when they've found regex find/replace useful in their editor? Here's what I've been able to come up with since then as examples of things that I've actually had to do:
Strip the beginning of a line off of every line in a file that looks like:
Line 25634 :
Line 632157 :
Taking a few dozen files with a standard header which is slightly different for each file and stripping the first 19 lines from all of them all at once.
Piping the result of a MySQL select statement into a text file, then removing all of the formatting junk and reformatting it as a Python dictionary for use in a simple script.
In a CSV file with no escaped commas, replace the first character of the 8th column of each row with a capital A.
Given a bunch of GDB stack traces with lines like
#3 0x080a6d61 in _mvl_set_req_done (req=0x82624a4, result=27158) at ../../mvl/src/mvl_serv.c:850
strip out everything from each line except the function names.
Does anyone else have any real-life examples? The next time this comes up, I'd like to be more prepared to list good examples of why this feature is useful.
Just last week, I used regex find/replace to convert a CSV file to an XML file.
Simple enough to do really, just chop up each field (luckily it didn't have any escaped commas) and push it back out with the appropriate tags in place of the commas.
Regex make it easy to replace whole words using word boundaries.
(\b\w+\b)
So you can replace unwanted words in your file without disturbing words like Scunthorpe
Yesterday I took a create table statement I made for an Oracle table and converted the fields to setString() method calls using JDBC and PreparedStatements. The table's field names were mapped to my class properties, so regex search and replace was the perfect fit.
Create Table text:
...
field_1 VARCHAR2(100) NULL,
field_2 VARCHAR2(10) NULL,
field_3 NUMBER(8) NULL,
field_4 VARCHAR2(100) NULL,
....
My Regex Search:
/([a-z_])+ .*?,?/
My Replacement:
pstmt.setString(1, \1);
The result:
...
pstmt.setString(1, field_1);
pstmt.setString(1, field_2);
pstmt.setString(1, field_3);
pstmt.setString(1, field_4);
....
I then went through and manually set the position int for each call and changed the method to setInt() (and others) where necessary, but that worked handy for me. I actually used it three or four times for similar field to method call conversions.
I like to use regexps to reformat lists of items like this:
int item1
double item2
to
public void item1(int item1){
}
public void item2(double item2){
}
This can be a big time saver.
I use it all the time when someone sends me a list of patient visit numbers in a column (say 100-200) and I need them in a '0000000444','000000004445' format. works wonders for me!
I also use it to pull out email addresses in an email. I send out group emails often and all the bounced returns come back in one email. So, I regex to pull them all out and then drop them into a string var to remove from the database.
I even wrote a little dialog prog to apply regex to my clipboard. It grabs the contents applies the regex and then loads it back into the clipboard.
One thing I use it for in web development all the time is stripping some text of its HTML tags. This might need to be done to sanitize user input for security, or for displaying a preview of a news article. For example, if you have an article with lots of HTML tags for formatting, you can't just do LEFT(article_text,100) + '...' (plus a "read more" link) and render that on a page at the risk of breaking the page by splitting apart an HTML tag.
Also, I've had to strip img tags in database records that link to images that no longer exist. And let's not forget web form validation. If you want to make a user has entered a correct email address (syntactically speaking) into a web form this is about the only way of checking it thoroughly.
I've just pasted a long character sequence into a string literal, and now I want to break it up into a concatenation of shorter string literals so it doesn't wrap. I also want it to be readable, so I want to break only after spaces. I select the whole string (minus the quotation marks) and do an in-selection-only replace-all with this regex:
/.{20,60} /
...and this replacement:
/$0"¶ + "/
...where the pilcrow is an actual newline, and the number of spaces varies from one incident to the next. Result:
String s = "I recently discussed editors with a co-worker. He uses one "
+ "of the less popular editors and I use another (I won't say "
+ "which ones since it's not relevant and I want to avoid an "
+ "editor flame war). I was saying that I didn't like his "
+ "editor as much because it doesn't let you do find/replace "
+ "with regular expressions.";
The first thing I do with any editor is try to figure out it's Regex oddities. I use it all the time. Nothing really crazy, but it's handy when you've got to copy/paste stuff between different types of text - SQL <-> PHP is the one I do most often - and you don't want to fart around making the same change 500 times.
Regex is very handy any time I am trying to replace a value that spans multiple lines. Or when I want to replace a value with something that contains a line break.
I also like that you can match things in a regular expression and not replace the full match using the $# syntax to output the portion of the match you want to maintain.
I agree with you on points 3, 4, and 5 but not necessarily points 1 and 2.
In some cases 1 and 2 are easier to achieve using a anonymous keyboard macro.
By this I mean doing the following:
Position the cursor on the first line
Start a keyboard macro recording
Modify the first line
Position the cursor on the next line
Stop record.
Now all that is needed to modify the next line is to repeat the macro.
I could live with out support for regex but could not live without anonymous keyboard macros.