[Template function] Simple template function using js template string #node #template

simple-template.js

// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Template_literals

function template(strings, ...keys) {
  return ((...values) => {
    const dict = values[values.length - 1] || {};
    const result = [strings[0]];
    keys.forEach((key, i) => {
      const value = Number.isInteger(key) ? values[key] : dict[key];
      result.push(value, strings[i + 1]);
    });
    return result.join('');
  });
}

const t1Closure = template`${0}${1}${0}!`;
t1Closure('Y', 'A');  // "YAY!"

const t2Closure = template`${0} ${'foo'}!`;
t2Closure('Hello', {foo: 'World'});  // "Hello World!"