Javascript 我是否可以在不指定变量的情况下返回else/if语句的答案？

我创建了一个包含电影对象的数组，该数组根据观看或未观看（if/else）来迭代和打印结果

movies.forEach（函数（arr）{
让answer=“you have”您可以像这样使用三元运算符：

let answer = "you have " + (arr.hasWatched ? "watched " : "not seen ");

理论上，您可以执行相当长的
console.log
，以完全避免变量：

console.log("you have " + (arr.hasWatched ? "watched " : "not seen ") + "\"" + arr.title + "\" - " + arr.rating + " stars")

但是，这不是很容易阅读。
您可以在对象中选择一个字符作为所需的文本

为了获得替代方案，您可以利用

有两种有条件地执行操作的方法，一种是
if
语句，另一种是三元表达式。对于后者，您根本不需要变量：

 console.log( 
    "you have " +
   (arr.hasWatched ? "watched " : "not seen ") + // << ternary
   "\"" + arr.title + "\" - " + arr.rating + " stars"
 );

console.log（
“你有”+
（arr.hasweed？“waved”：“not seen”）+//
movies.forEach(({ hasWatched, title, rating }) => {
    console.log(`you have ${hasWatched ? "watched" : "not seen"} "${title}" ${rating} stars`);
});

 console.log( 
    "you have " +
   (arr.hasWatched ? "watched " : "not seen ") + // << ternary
   "\"" + arr.title + "\" - " + arr.rating + " stars"
 );