Regular Expressions: Difference between revisions
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Capturing significand and exponent separately. | Capturing significand and exponent separately. | ||
<syntaxhighlight lang="ragel"> | <syntaxhighlight lang="ragel"> | ||
([-+]?\d*\.?\d+)(?:[eE]([-+]?\d+)) | ([-+]?\d*\.?\d+)(?:[eE]([-+]?\d+))? | ||
</syntaxhighlight> | </syntaxhighlight> | ||
Capturing the entire string together. | Capturing the entire string together. | ||
<syntaxhighlight lang="ragel"> | <syntaxhighlight lang="ragel"> | ||
([-+]?\d*\.?\d+[eE][-+]?\d+) | ([-+]?\d*\.?\d+(?:[eE][-+]?\d+)?) | ||
</syntaxhighlight> | </syntaxhighlight> | ||
Revision as of 12:17, 23 September 2019
Regular expressions are used for matching text.
You can test regular expressions online at [1].
Useful Regular Expressions
Mostly copied from Regex DB.
Floating Point Number
Without matching scientific notation (e.g. 1.5e-6). Reference
[-+]?[0-9]*\.?[0-9]+
With matching scientific notation (e.g. 1.5e-6).
Reference
Capturing significand and exponent separately.
([-+]?\d*\.?\d+)(?:[eE]([-+]?\d+))?
Capturing the entire string together.
([-+]?\d*\.?\d+(?:[eE][-+]?\d+)?)