Re^2: Floating Point/Integer Regular Expression

[shortyfw06]

in reply to Re: Floating Point/Integer Regular Expression
in thread Floating Point/Integer Regular Expression

Thank you. That is a useful function! I ended up answering my own question for a regex that includes negative/positive integers and negative/positive floating points.

/^(?:|-|\d+|-\d+|\d+.|-\d+\.|\d+\.\d+|-\d+\.\d+)$/

And just for clarification, this is used as a -validatecommand.

[tobyink]

Did you know that regexp matches:

• -
• 1.

But fails to match:

• .1
• -.1

You might want to try this. It's somewhat simpler than yours, and it disallows the single hyphen, but allows decimals which start with the decimal point and no preceding 0.

/^[-]?(?:[.]\d+|\d+(?:[.]\d*)?)$/

Or if you consider a leading/trailing decimal point to be an error, it can be made simpler:

/^[-]?\d+(?:[.]\d+)?$/