浮点数/双精度数的正则表达式

Question

I've been trying to retrieve a string and 2 decimal numbers from a sentence, but the decimal part hasn't been working well.

The sentence I have is on this format: AMBIENT_CAVE 0.5 1 So it would be word (sometimes containing _ ) then 2 numbers that could be either integer (1 or 0) or a decimal between 0 and 1.

My current regular expression is: (\\w+) ([+-]?([0-9]*[.])?[0-9]+) ([+-]?([0-9]*[.])?[0-9]+) Which kinda works, but using the sentence example from above group 3 would be 0. .

Results:

I only want AMBIENT_CAVE , 0.5 and 1 .
Anyone know how to do it?

Answer 1

Add a ?: to any group you don't want to capture:

(\w+) ([+-]?(?:[0-9]*[.])?[0-9]+) ([+-]?(?:[0-9]*[.])?[0-9]+)
             ^                           ^

Answer 2

You can try this one. Please provide more examples of available strings in order to optimize an expression

  (\w+)\s([\d\.]+)\s([\d\.]+)