JavaScript数组映射，返回大于20的数字

Question

我尝试在parseInt（string，10）之后编写＆gt; = 20，但这不起作用。所以在我将数组项转换为整数后，我是否检查它们是否大于20？

         const strings = ["10", "20","40","","50", "60", "70"];
         const numbers = strings.map(string => parseInt(string,10));
         console.log(numbers);

Answer 1

您可以将Array#filter与条件一起使用，并映射获取数字数组的值。

＆＃13;

＆＃13;

var strings = ["10", "20","40","","50", "60", "70"],
    numbers = strings
        .filter(v => +v >= 20)
        .map(Number);

console.log(numbers);

＆＃13;

＆＃13;

＆＃13;