从字符串中获取价格

Question

I am trying to get a price and the plus or minus from a string using jquery.
I'm pretty sure regex is the way to go, but I just can't seen to get it right.

Bla bla bla bla (- € 0.25)

direction = -
amount = 0.25

What regexes should I use?

Answer 1

In JavaScript (there are no jQuery regexes), use

var results = input.match(/\(([+-])\s*€\s*(\d+\.\d{2})\)/);

For your input, the result of the match is:

results[0]: "(- € 0.25)"
results[1]: "-"
results[2]: "0.25"
results.index: 16

Answer 2

"[^€]*€[ ]*\([.[:digit:]]*\).*" -> "\1"

This is POSIX. You can use it so:

sed "s|[^€]*.[ ]*\([.[:digit:]]*\).*|\1|"

Answer 3

试试这样的事情：

/^(.+) \((\- ){0,1}€ ([0-9\.]+)\)$/