ImageJ1 macro function to generate random string

Random_String.ijm

function randomString(length, spacers) {
	template = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
	nChars = lengthOf(template);
	string = "";
	for (i=0; i<length; i++) {
		idx = maxOf(0, round(random()*nChars-1));
		string += substring(template, idx, idx+1);
		if (spacers && i%5==0) string += "_";
	}
	return string;
}

n = 1; while (n<6)
	print(n++, randomString(20, true));
n = 1; while (n<6)
	print(n++, randomString(10, false));