Difference between revisions of "Regular Expression"
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(Created page with "RegEx can be tricky! Hopefully this will provide some help. This is an example of perl-regex format which is used in Netbeans and Atom <pre> a-c(\d[{2-2}]\d{1}?[{0-9}]\d) </p...") |
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| − | This will match a-c213 as well as a-c2199 | + | This will match a-c213 as well as a-c2199. It will not match b2199 nor a-c229. Can you figure out why? |
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| + | The ? makes the following statement optional. | ||
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| + | \d is a digit | ||
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| + | [{x-y}] indicates a range from x to y. This can be alphanumeric. | ||
| + | |||
| + | {1} indicates that just that character is accepted. | ||
| + | |||
| + | Everything outside the parentheses is literal. So "a-c" matches that string, literally. | ||
Revision as of 15:44, 25 August 2016
RegEx can be tricky! Hopefully this will provide some help.
This is an example of perl-regex format which is used in Netbeans and Atom
a-c(\d[{2-2}]\d{1}?[{0-9}]\d)
This will match a-c213 as well as a-c2199. It will not match b2199 nor a-c229. Can you figure out why?
The ? makes the following statement optional.
\d is a digit
[{x-y}] indicates a range from x to y. This can be alphanumeric.
{1} indicates that just that character is accepted.
Everything outside the parentheses is literal. So "a-c" matches that string, literally.
