Question

我想检查输入值是否存在于obj中，我显示一个警报（“找到数量”），然后在第二个obj2中推送该数量，并且该数量被禁用来自obj1，（我是说当我再次检查num时，它应该不可用），我不知道最好的方法是在对象中添加一些额外的密钥used还是创建一个新对象obj2，然后首先检查是否已使用这些值。

var obj = [
    {"id":1, "num":123, "val":20, "type":"weekend"},
    {"id":2, "num":456, "val":30, "type":"weekend"},
    {"id":3, "num":789, "val":15, "type":"semaine"},
    {"id":4, "num":101, "val":25, "type":"semaine"}
];

var obj2 = [
];

html：

<input id="code"/> // val = 15

Js

jQuery("input").on("keydown",function search(e) {
        if(e.keyCode == 13) { //when hit enter
            var tik = jQuery(this).val();
            console.log(tik);

            var obj = [
                {"id":1, "num":123, "val":20, "type":"week"},
                {"id":2, "num":456, "val":30, "type":"week"},
                {"id":3, "num":789, "val":15, "type":"day"},
                {"id":4, "num":101, "val":25, "type":"day"}
            ];

            if (tik in obj2.num) { // It doesn't work for me
                alert("num found");
            //I push this value to obj2
            ...
            } else {
                alert("num not found");
                //I don't push to obj2
            }

Answer 1

您的情况可以是这样的：

 if (obj.find(o => o.num === parseInt(tik))) {
   alert("num found");
   //I push this value to obj2
 } else {
   alert("num not found");
   //I don't push to obj2
 }

检查值是否在具有特定键的特定对象中

1 个答案: