RegEx for positive number + greater than zero an decimal (0.1)

问题

I want to validate a field in javascript to have at least 1 and should be positive number or decimal.

Examples:

1
1.1
0.1
10.10

My current regex looks like this:

var _RegEx = /^[+]?([0-9]+(?:[\.][0-9]*)?|\.[0-9]+)$/;

回答1:

Simple:

 /^\+?(\d*[1-9]\d*\.?|\d*\.\d*[1-9]\d*)$/.test(x)

Simpler:

0 < parseInt(x, 10) && parseInt(x, 10) < Infinity

Simplest:

0 < +x && +x < Infinity && !/[^\d.+]/.test(x)

Thanks to Jack, the last one is not so simple anymore. :/

回答2:

^((0?0?\.([1-9]\d*|0[1-9]\d*))|(([1-9]|0[1-9])\d*(\.\d+)?))$

---

12.34
00.34
0.34
109.341
0.00 (not matched)
.9
9
09
0 (not matched)

来源：https://stackoverflow.com/questions/19627995/regex-for-positive-number-greater-than-zero-an-decimal-0-1