String Template Lite - Dart Programming

A tiny template renderer walks a {key: value} map and swaps each <<key>> placeholder in the template with the matching value. replaceAll does the heavy lifting; the loop just rebinds result once per entry.

Program

Play the program to render a small template with two placeholders.

string_template_lite.dart

void main() {
  var template = '<<name>> has <<count>> tasks';
  var values = {'name': 'Ada', 'count': '3'};
  var result = template;
  for (var entry in values.entries) {
    result = result.replaceAll('<<${entry.key}>>', entry.value);
  }
  print(result);
}

placeholders Wrap each key in `<<...>>` so the template reads cleanly next to surrounding text.

replaceAll `result.replaceAll('<<name>>', 'Ada')` swaps every occurrence; safe when a placeholder repeats.

rebind `result = result.replaceAll(...)` rebinds the same name each iteration since Dart strings are immutable.