ES6学习：两个面试题目--关于模板字符串

// 写法一

let str = 'return ' + '`Hello ${name}!`';

let func = new Function('name', str);

func('Jack') // "Hello Jack!"

// 写法二

let str = '(name) => `Hello ${name}!`';

let func = eval.call(null, str);

func('Jack') // "Hello Jack!"

let total = 30;

let msg = passthru`The total is ${total} (${total*1.05} with tax)`;

function passthru(literals) {

  let result = '';

  let i = 0;

  while (i < literals.length) {

    result += literals[i++];

    if (i < arguments.length) {

      result += arguments[i];

    }

  }

  return result;

}

msg // "The total is 30 (31.5 with tax)"