Question

How to write the regular expression for the below string using Javascript.

[Account].&[1]+[Account].&[2]+[Account].&[3]+[Account].&[4]

T need the following output format

1,2,3,4

emoving all the strings and special characters.

Answer 1

/\[(\d+)\]/g

That will return you the array containing all numbers in the string, which you then can join using , as delimiter.

var string = "[Account].&[1]+[Account].&[2]+[Account].&[3]+[Account].&[4]";
var numbers = string.match(/\[(\d+)\]/gi);
alert(numbers.join(','));