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Expressions by User

   Displaying page 1 of 1 pages; Items 1 to 7
Title Test Details Multiples of 3
Expression
([0369]*([147][0369]*([147][0369]*[258])*[0369]*[147][0369]*([258][0369]*[147])*[0369]*[0369]*([258][0369]*[147])*[0369]*[147]|[258][0369]*([258][0369]*[147])*[0369]*[258][0369]*([147][0369]*[258])*[0369]*[0369]*([147][0369]*[258])*[0369]*[258]|[147][0369]*([147][0369]*[258])*[0369]*[258]|[258][0369]*([258][0369]*[147])*[0369]*[147])*[0369]*)*
Description
Matches any sequence of decimal digits that represent a positive denary multiple of three.
Matches
0 | 3 | 12 | 129762
Non-Matches
1 | 2 | 129761
Author Rating: Not yet rated. Michael Dumas
Title Test Details Digit-grouped numbers
Expression
[+-]?(0|[1-9]([0-9]{0,2})(,[0-9]{3})*)(\.[0-9]+)?
Description
Matches any positive or negative number, with or without decimal places, where the digits are grouped in threes seperated by commas.
Matches
0 | 1 | -999 | +1,001 | 1,234,567.0
Non-Matches
alpha | 0xFF | 1,2,345,678 | 1,234.
Author Rating: Not yet rated. Michael Dumas
Title Test Details Scientific Notation
Expression
[+-]?\d(\.\d+)?[Ee][+-]?\d+
Description
Matches a number using normalised scientific 'E' notation
Matches
-1.23E99 | 1E0 | -9.999e-999
Non-Matches
+10E0 | 2.3e5.4
Author Rating: Not yet rated. Michael Dumas
Title Test Details 2-7 character palindrome words
Expression
(\w)(\w)?(\w)?\w?(?(3)\3)(?(2)\2)\1
Description
Matches any palindromic word of between 2 and 7 characters length. Best to use without case-sensitivity as "Noon" would not match otherwise because of the capitalisation.
Matches
aa | did | peep | minim | hallah | racecar
Non-Matches
a | Anna | detartrated
Author Rating: Not yet rated. Michael Dumas
Title Test Details Trailing whitespace
Expression
[ \t]+$
Description
Use in Java programming code to find trailing spaces (a checkstyle warning). Replace All with the empty string to remove them.
Matches
int i = 0; | shutUp();
Non-Matches
// a perfect comment...
Author Rating: Not yet rated. Michael Dumas
Title Test Details Unicode non-characters
Expression
[\uFDD0-\uFDEF]
Description
Matches any of the 66 unicode non-characters (guaranteed never to be used for encoding characters). Could be useful for checking if a document is text-renderable.
Matches
(obviously this one is impossible to exemplify...)
Non-Matches
Author Rating: Not yet rated. Michael Dumas
   Displaying page 1 of 1 pages; Items 1 to 7

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