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I would like to match with RegExp a number between X and Y. Is that possible?
([0-9]+) will match any number, how could I do to match a number between, for instance, 110 and 2234?
448
The regex [0-9] matches single-digit numbers 0 to 9. [1-9][0-9] matches double-digit numbers 10 to 99. Something like ^[2-9][1-6]$ matches 21 or even 96! Any help would be appreciated.
To match a character having special meaning in regex, you need to use a escape sequence prefix with a backslash ( \ ). E.g., \. matches "." ; regex \+ matches "+" ; and regex \( matches "(" . You also need to use regex \\ to match "\" (back-slash).
Real number regex can be used to validate or exact real numbers from a string.
A regular expression is a pattern of text that consists of ordinary characters, for example, letters a through z, and special characters. Character(s) Matches in searched string.
According to Generate a Regular Expression to Match an Arbitrary Numeric Range, and after generating such a regex for your example at Regex_For_Range:
\b0*(1[1-9][0-9]|[2-9][0-9]{2}|1[0-9]{3}|2[01][0-9]{2}|22[0-2][0-9]|223[0-4])\b would do the trick.
The process would be (still following that Regex generator):
First, break into equal length ranges:
110 - 999 1000 - 2234 Second, break into ranges that yield simple regexes:
110 - 199 200 - 999 1000 - 1999 2000 - 2199 2200 - 2229 2230 - 2234 Turn each range into a regex:
1[1-9][0-9] [2-9][0-9]{2} 1[0-9]{3} 2[01][0-9]{2} 22[0-2][0-9] 223[0-4] Collapse adjacent powers of 10: 1[1-9][0-9] [2-9][0-9]{2} 1[0-9]{3} 2[01][0-9]{2} 22[0-2][0-9] 223[0-4]
Combining the regexes above yields:
0*(1[1-9][0-9]|[2-9][0-9]{2}|1[0-9]{3}|2[01][0-9]{2}|22[0-2][0-9]|223[0-4]) Next we'll try factoring out common prefixes using a tree:
Parse into tree based on regex prefixes:
. 1 [1-9] [0-9] + [0-9]{3} + [2-9] [0-9]{2} + 2 [01] [0-9]{2} + 2 [0-2] [0-9] + 3 [0-4] Turning the parse tree into a regex yields:
0*(1([1-9][0-9]|[0-9]{3})|[2-9][0-9]{2}|2([01][0-9]{2}|2([0-2][0-9]|3[0-4]))) We choose the shorter one as our result.
\b0*(1[1-9][0-9]|[2-9][0-9]{2}|1[0-9]{3}|2[01][0-9]{2}|22[0-2][0-9]|223[0-4])\b If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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