javascript - 检查数组是否包含一个值[以有效的方式]

Question

我有一个由多个用点分隔的句子组成的变量，名为var a。然后我想检查 Result 值是否等于 var a 上的句子之一:

这是代码:

var a = "my name is jack. your name is sara. her name is joe. his name is mike";
var nameSplit = a.split(".");

console.log(nameSplit.length);
console.log(nameSplit);

var Result = "his name is mike";
var i;
for (i = 0; i < nameSplit.length; i++) { 
    if (nameSplit[i].includes(Result)) {
       console.log("Result is one of the sentences on var a");
    }
}

代码运行良好。

问题是，如果我在 var a 上有 1000 个句子或 10000 个句子，我不知道这段代码是否可以快速高效地运行？

是否有任何修改可以使代码执行速度更快？

有没有更好的解决方案来做到这一点？

Answer 1

您可以使用 Array.prototype.includes 来检查数组是否包含字符串。或 String.prototype.includes 来匹配子字符串。

var a = "my name is jack. your name is sara. her name is joe. his name is mike";
var nameSplit = a.split(". ");
var Result = "his name is mike";
nameSplit.includes(Result) // true

或

var a = "my name is jack. your name is sara. her name is joe. his name is mike";
var Result = "his name is mike";
a.includes(Result) // true