includes使用总结

工作中有时候会遇到这样的情况

var name = "love"
var name2 = "hate"
if(name=="a" || name=="b" || name=="c" || name=="d" ......){}
if(name2=="a" || name2=="b" || name2=="c" || name2=="d" ......){}

太笨重了，我们可以这样：

var name = "love"
var arr = ["a", "b", "c", "d", "e", "f"]
if (arr.includes(name)) {
  console.log(1)
}

还一个用法：

                var p1 = [];
                for (var i in ones) {
                    var name = ones[i].name;
                    if (!p1.includes(name)) {
                        p1.push(name)
                    }
                }