These are some demo strings,
enum('a', 'b', 'c')
varchar(255)
int unsigned
Taking first one as an example, I want to match enum and 'a', 'b', 'c'. Everything inside brackets are optional as you see in 3rd example: int unsigned. How do I do this?
I tried,
(.*)(\((.*)\))?
However this matches whole string for some reason.
const out = /(.*)(\((.*)\))?/.exec(`enum('a', 'b', 'c')`)
console.log(out)You can use
const [, first, second] = /^(.*?)(?:\((.*)\))?$/.exec(`enum('a', 'b', 'c')`)
console.log(first + '\n' + second)See the regex demo. Details:
^ - start of string(.*?) - Group 1: any zero or more chars other than line break chars as few as possible(?:\((.*)\))? - an optional sequence of (, any zero or more chars other than line break chars as many as possible (captured into Group 2), and then a ) char$ - end of string.const tests = [
"enum('a', 'b', 'c')",
"varchar(255)",
"int unsigned"
];
tests.forEach(test => console.log(/([^(]+)(?:\((.*)\))?/.exec(test)));The first capturing group grabs the part before the parenthesis, the second optionally what is contained within the parenthesis if applicable.