Re^2: 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+)$/
[download]

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

Comment on Re^2: Floating Point/Integer Regular Expression Download Code

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Re^3: Floating Point/Integer Regular Expression by tobyink (Canon) on Jul 25, 2012 at 23:45 UTC
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*)?)$/` [download] Or if you consider a leading/trailing decimal point to be an error, it can be made simpler: `/^[-]?\d+(?:[.]\d+)?$/` [download] `perl -E'sub Monkey::do{say$_,for@_,do{($monkey=[caller(0)]->[3])=~s{::}{ }and$monkey}}"Monkey say"->Monkey::do'`	[reply] [d/l] [select]

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Re^3: Floating Point/Integer Regular Expression
by tobyink (Canon) on Jul 25, 2012 at 23:45 UTC

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*)?)$/
[download]

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

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

perl -E'sub Monkey::do{say$_,for@_,do{($monkey=[caller(0)]->[3])=~s{::}{ }and$monkey}}"Monkey say"->Monkey::do'

[reply]
[d/l]
[select]