循环检查两个数组总是只返回一个元素

Question

我有两个数组，一个数组是字符串['security', 'hobbies'] [{name: 'randome', category: 'hobbies'}, {name: 'randome', category: 'randome'}, {name: 'randome', category: 'randome'}, {name: 'randome', category: 'security'}] ['security', 'hobbies']的数组，另一个数组是对象[{name: 'randome', category: 'hobbies'}, {name: 'randome', category: 'randome'}, {name: 'randome', category: 'randome'}, {name: 'randome', category: 'security'}] ，我试图循环两个数组并splice所有这些数组与第一个数组上的类别不匹配的对象，但在循环中始终只获得一个元素。

for (let i = 0; i < searchparam.category.length; i++) {
        for (let j = 0; j < validapps.length; j++) {
          let match: boolean = false;
          if (validapps[j].category === searchparam.category[i]) {
            console.log(validapps[j])
            match = true;
            return;
          }
          if (!match) {
            validapps.splice(j, 1);
            j--;
          }
        }
 }

循环后，我应该得到2个或更多元素，但总是只有一个。 结果数据始终是一个元素。

_id: "598c69259fe2ff5fd0432396"
active: true
app_language: Array [ "DE" ]
application_code: "ASF"
blacklist: Array []
category: "utilities"
comments: ""
contacts: Array [ "598c40cf0f05ba5d0c5da01a", "598c66d59fe2ff5fd043238a", "59ce05683d7daf37702c1fc1", … ]
id: "598c69259fe2ff5fd0432396"
image: ""
insertDate: "2017-08-10T14:09:41.189Z"
name: "Alpha SSD Fresh"
os: Array [ {…} ]
updateDate: "2017-08-10T14:09:41.608Z"

Answer 1

或者您可以使用filter

var arr = [{name: 'randome', category: 'hobbies'}, {name: 'randome', category: 'randome'}, {name: 'randome', category: 'randome'}, {name: 'randome', category: 'security'}];
var validItems = ['security', 'hobbies'];
arr = arr.filter( s => validItems.indexOf( s.category ) != -1 ); //only those items will be passed through which have valid categories

要么

arr = arr.filter( s => validItems.includes( s.category ) ); //only those items will be passed through which have valid categories