In the Find/Replace dialog, what is the difference between the options "case-sensitive" and "preserve case"?
The Case sensitive option determines what will be matched. The Preserve case option determines if the matched text's case is preserved or not when replacing it with the replacement string.
Here's an example which should make this clear. Imagine you have this:
word
Word
If Case sensitive is not selected and you look for word, text from both lines will be selected. If it is selected, only the first, lowercase word will be matched.
Let's say we're using tapioca as the replacement string. If Preserve case is not selected (and Case sensitive isn't either), a Replace All would give you the following result:
tapioca
tapioca
With Preserve case enabled, it would instead become:
tapioca
Tapioca
i.e., the second Word's case would be preserved and "applied" to the replacement string.
Related
I am making a small online database that is accessible through the form of checkboxes for download. I was wondering if there was some way to list all of the filenames available for download in Sublime Text 2 and insert the same code around each filename?
Everything is functional, it would just save me a lot of repetitive copy and pasting if there is a faster way to do this.
Use SublimeText Find & Replace. Click the Regex button (it looks like a * to the left of the search box)
In the Find box, insert: (^.*$)
In the replace box: [yourcode]$1[yourcode]
Where [yourcode] is what you want to insert into the box.
So, if you want to make them all <li> then your replace box would be:
<li>$1</li>
Remember to use escape \ characters where they are needed, in case you need to insert restricted characters.
^ - beginning of a new line.
. - wildcard
* - any number of the previous character in the sequence (in this case a wildcard, so any text)
$ - the end of a line
() - denotes a block, it's how the $1 knows what text to put in it's place.
Sublime Text Search and Replace
Use search/replace on a text editor with regular expressions.
^ and $ represent the beginning and end of a line - thus allowing you to easily surround each line with the appropriate text.
Sometimes you can copy the newline character (as in copy the end of one line to the beginning of the next line), and replace that with whatever text you need.
You could always use the regular expression search / replace feature in Notepad++.
Disclaimer: I know that html and regex should not stand together, but this is an exceptional case.
I need to parse Google Search results and extract cache urls. I have this in the page:
<a href="/url?q=http://webcache.googleusercontent.com/search%3Fq%3Dcache:
gsNKb7ku3ewJ:somedata&ei=MyIIUtrZAcPX7AaVzIHwDg&ved=0CB8QIDAC&usg
=AFQjCNGcnWfdzQiTKwyAMmI-M-xzxII5Ag">Cached</a>
I tried simple stuff like: href=[\'"]?([^\'" >]+) but it is not what I need. I want to extract a single parameter (q) from the href. I need to get:
http://webcache.googleusercontent.com/search%3Fq%3Dcache:gsNKb7ku3ewJ:somedata
So everything between "url?q=" and first "&", when the contents contain word "webcache" in it.
If your language supports positive look-behinds:
(?<=q=).*?(?=[&"])
Otherwise match group \1 with this expression:
(?:q=)(.*?)(?=[&"])
Explanation:
.*? is the body of our expression. Just match everything, but don't be greedy!
(?<=q=) is a positive look-behind, which says "q=" should come before the match
(?=[&"]) is a positive look ahead, which says "either & or a quote should come after the match"
Because we make it not greedy with the ?, it'll stop at the first quote or ampersand. Otherwise it'd match all of the way to the closing quote.
Use a look behind before, and a look ahead at the end to assert the surrounding text, and include the keyword in the regex:
(?<=url\?q=)[^&]*webcache[^&]*(?=&)
Using [^&]* ensures that the keyword occurs before an & - within the target string.
In ST2 ⌘+D expands the selection to the next word, using case insensitive matching. Is it possible to match the word case sensitive?
If you select Case sensitive in Find dialog (⌘+F), it will be remembered for ⌘+D as well.
I have a regex '^[A0-Z9]+$' that works until it reaches strings with 'special' characters like a period or dash.
List:
UPPER
lower
UPPER lower
lower UPPER
TEST
test
UPPER2.2-1
UPPER2
Gives:
UPPER
TEST
UPPER2
How do I get the regex to ignore non-alphanumeric characters also so it includes UPPER2.2-1 also?
I have a link here to show it 'real-time': http://www.rubular.com/r/ev23M7G1O3
This is for MySQL REGEX
EDIT: I didn't specify I wanted all non-alphanumeric characters (including spaces), but with the help of others here it led me to this: '^[A-Z-0-9[:punct:][:space:]]+$' is there anything wrong with this?
Try
'^[A-Z0-9.-]+$'
You just need to add the special characters to the group, optionally escaping them.
Additionally if you choose not to escape the -, be aware that it should be placed at the start or the end of the grouping expression to avoid the chance that it may be interpreted as delimiting a range.
To your updated question, if you want all non-whitespace, try using a group such as:
^[^ ]+$
which will match everything except for a space.
If instead what you wanted is all non-whitespace and non-lowercase, you likely will want to use:
^[^ a-z]+$
The 'trick' used here is adding a caret symbol after the opening [ in the group expression. This indicates that we want the negation of the match.
Following the pattern, we can also apply this 'trick' to get everything but lowercase letters like this:
^[^a-z]+$
I'm not really sure which of the 3 above you want, but if nothing else, this ought to serve as a good example of what you can do with character classes.
I believe you are looking for (one?) uppercase-word match, where word is pretty much anything.
^[^a-z\s]+$
...or if you want to allow more words with spaces, then probably just
^[^a-z]+$
You just need to put in the . and -. In theory, you don't need to escape because they are inside the brackets, but I like to to remind myself to escape when I have to.
'^[A-Z0-9\.\-]+$'
Try regular expression as below:
'^[A0-Z0\\.\\-]+$'
I would like to highlight words matching a regular expression in a JTextPane.
I've seen various examples but they all where very complicated with complete syntax highlighting. I just want to highlight (or set in bold) a word/sentence, is there a simple way to do that?
If the overall underlying text of what is in the JTextPane is just a regular string and not HTML:
Get the underlying document from the JTextPane.
StyledDocument sdoc = textpane.getStyledDocument()
EDITED: changed to directly calling textPane.getStyledDocument, instead of casting the result of getDocument()
Get the text of the document.
String text = sdoc.getText(0, sdoc.getLength())
Use the Pattern and Matcher classes to find the locations that match the regular expression. I assume you already know how to do that.
For every location where a match is found, highlight the start to end of the matching substring with sdoc.setCharacterAttributes or use a highlighter (see JTextPane highlight text)