joinString static method

String? joinString(
  1. String sep,
  2. List<String> items
)

Implementation

static String? joinString(String sep, List<String> items){
if (items.isEmpty){
  return null;
}
var out = "";
out+= items[0];
for (int i=1; i<items.length; i++){
out += sep;
out += items[i];
}
return out;
}