javascript - 如何比较数组并创建与数组 a 匹配的新数组？

Question

如果数组 b 包含数组 a 的字符串值，我想匹配两个数组 我想创建新数组，下面的代码将所有对象从数组 b 中推送出来。我怎样才能只推送匹配的对象？

控制键

 var a = ["standard","industry","4578595"]
 var b = [{file:"server.log",value:"lorem ipsum industry standard 4578595"}, {file:"server.log",value:"lorem ipsum industry standadr"},{file:"server.log",value:"lorem ipsum industry"}];
 var finalyArray = [];
 function compareArrays() {   
     for (i = 0; i < a.length; i++) {
         for (z = 0; z < a.length; z++) {
             if (a[i] === b[z]) {
                 finalArray.push(b[z]);
                 console.log(finalArray); 
             }
         }
     }
}

compareArrays();

Answer 1

无需使用嵌套循环和正常迭代。

数组过滤更干净，非常适合这个:

const a = ["standard","industry","4578595"]
const b = [{file:"server.log",value:"lorem ipsum industry standard 4578595"}, {file:"server.log",value:"lorem ipsum industry standadr"},{file:"server.log",value:"lorem ipsum industry"}];

const matchingCondition = ({ itemB, itemA }) => itemB.value.includes(itemA);

// filter all items from B that satisfy a matching condition with at least one item from A
const matches = b.filter(
  itemB => a.some(
    itemA => matchingCondition({ itemB, itemA })
  )
);

console.log(matches);