Question

I have let’s say this string:

“A = Beta * C / Delta + 2”;

Now I want to replace all the variables(A, Beta, C, Delta) with the same name but with a prefix before it, like “x”. So it would become:

“xA = xBeta * xC / xDelta + 2”;

Maybe my head is just tired, but I can’t think of a solution for this.

To find matches, it’s easy, just test against /[a-zA-Z]+/ regex, but how in javascript should I get what I found and replace it easily not using multiple function calls?

Answer 1

Try this:

var str = "A = Beta * C / Delta + 2";
var prefixed = str.replace(/([a-zA-Z]+)/g, 'x$1');

Results in:

xA = xBeta * xC / xDelta + 2