I knew that we have something like this in the regular expression syntax world.
*The syntax is {min,max}, where min
is a positive integer number indicating the minimum number of matches, and max
is an integer equal to or greater than min
indicating the maximum number of matches.
So {0,}
is the same as *
, and {1,}
is the same as +*
.
http://www.regular-expressions.info/repeat.html
But how can I use it in SQL Server Management Studio or Visual Studio's "Find and Replace" window. I only find related Microsoft syntax in MSDN. Like:
[0-9]^4 matches any 4-digit sequence.
Vscode has a nice feature when using the search tool, it can search using regular expressions. You can click cmd+f (on a Mac, or ctrl+f on windows) to open the search tool, and then click cmd+option+r to enable regex search. Using this, you can find duplicate consecutive words easily in any document.
RegEx Tokenize This output method is similar to the Text to Columns tool but gives you much more flexibility: Alteryx searches the string input for each instances of your regex, placing each into a separate column or row.
Regular expressions, also referred to as “regex” in the developer community, is an extremely powerful tool used in pattern matching and substitution.
Regular expressions, most commonly referred to as RegEx (pronounced: Rej-Ex), are a sequence of characters that allows the user to create patterns that help match, locate, and manage any string data. In Alteryx, you can use the RegEx tool to replace, tokenize, parse, and match string values.
The Visual Studio regex implementation (in versions up until Visual Studio 2010) is a fairly nonstandard one to say the least, and it doesn't have this feature. You can only spell it out:
*
or @
: Match zero or more of the preceding expression
+
or #
: Match one or more of the preceding expression
^n
: Match exactly n repetitions of the preceding expression
So for A{2,4}
you'd have to use A^4|A^3|A^2
(see polygenelubricant's comment for an explanation why you need to do it in descending order).
More recent versions of Visual Studio support the entire set of .NET regexes.
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With