Question

I have a string

var stringP= "hi".rand(1,10)." my".rand(10,100)."name is ".rand(23,54).rand(1,4)

Pattern is

rand(from,to)

Need to get

hi5 my54name is 335

It possible to use something like that?

stringP.replace(/rand(*,*)/g, function(match){
    return match.replace(rand(*,*),Math.floor(Math.random() * (to - from + 1) + from));
});

Answer 1

Yes, nearly everything is possible. Yet, you want to use a [one!] proper regular expression, and a proper replace function:

stringP.replace(/rand\((\d+),(\d+)\)/g, function(match, from, to) {
    from = parseInt(from, 10);
    to = parseInt(to, 10);
    return Math.floor(Math.random() * (to - from + 1) + from);
});