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In Eclipse use the Ctrl + H shortcut to open the Search dialog. Select the File Search tab and check the Regular expression flag before entering your regular expression. You can also specify the file type and the scope for the search and replace operation.
How to use RegEx with . replace in JavaScript. To use RegEx, the first argument of replace will be replaced with regex syntax, for example /regex/ . This syntax serves as a pattern where any parts of the string that match it will be replaced with the new substring.
Select the word and press alt+shift+r then replace the word, it should reflect in all classes.
Regular expressions are useful in search and replace operations. The typical use case is to look for a sub-string that matches a pattern and replace it with something else. Most APIs using regular expressions allow you to reference capture groups from the search pattern in the replacement string.
Yes, ( ) captures a group. You can use it again with $i where i is the i'th capture group.
So:
search:
(\w+\.someMethod\(\))replace:
((TypeName)$1)
Hint: Ctrl + Space in the textboxes gives you all kinds of suggestions for regular expression writing.
Using ...
search = (^.*import )(.*)(\(.*\):)
replace = $1$2
...replaces ...
from checks import checklist(_list):
...with...
from checks import checklist
Blocks in regex are delineated by parenthesis (which are not preceded by a "\")
(^.*import ) finds "from checks import " and loads it to $1 (eclipse starts counting at 1)
(.*) find the next "everything" until the next encountered "(" and loads it to $2. $2 stops at the "(" because of the next part (see next line below)
(\(.*\):) says "at the first encountered "(" after starting block $2...stop block $2 and start $3. $3 gets loaded with the "('any text'):" or, in the example, the "(_list):"
Then in the replace, just put the $1$2 to replace all three blocks with just the first two.
NomeN has answered correctly, but this answer wouldn't be of much use for beginners like me because we will have another problem to solve and we wouldn't know how to use RegEx in there. So I am adding a bit of explanation to this. The answer is
search:
(\w+\\.someMethod\\(\\))replace:
((TypeName)$1)
Here:
In search:
First and last (, ) depicts a group in regex
\w depicts words (alphanumeric + underscore)
+ depicts one or more (ie one or more of alphanumeric + underscore)
. is a special character which depicts any character (ie .+ means
one or more of any character). Because this is a special character
to depict a . we should give an escape character with it, ie \.
someMethod is given as it is to be searched.
The two parenthesis (, ) are given along with escape character
because they are special character which are used to depict a group
(we will discuss about group in next point)
In replace:
It is given ((TypeName)$1), here $1 depicts the
group. That is all the characters that are enclosed within the first
and last parenthesis (, ) in the search field
Also make sure you have checked the 'Regular expression' option in find an replace box
At least at STS (SpringSource Tool Suite) groups are numbered starting form 0, so replace string will be
replace: ((TypeName)$0)
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