Regular Expressions
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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+)?)
