正则表达式Javascript二进制数验证

Question

i am trying to convert binary to decimal value

I am need a regular expression for validating the binary number.

//for now i am using 

var binary="1234"

 /^-{0,1}\d+$/g.test(binary)

//my output:

1

but i want the output to say not in binary format.

Thanks in advance

Answer 1

它匹配每个找到的条目，而不仅仅是第一个。

Answer 2

/^-{0,1}\d+$/g.test(binary)

validates any positive or negative integer ( \\d means "any digit"; also -{0,1} can be written as -? ). The g global flag doesn't make much sense here since you want to validate an entire string, not a substring in a longer, multi-line string (which wouldn't work anyway because the anchors ^ and $ make sure of that already).

Try this instead:

/^[01]+$/.test(binary)   

Answer 3

/[^0-1]/g.test(binary)

In this way checks all characters that aren't 0 or 1.

Probably isn't the best way to do it, but it worked for me.