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JS takes out the same elements in two arrays

2022-04-23 03:26:00 【Open the door of the world】

Achieve the goal

Commodity search , Need to meet name search and id Search for . Name search , Is the direct interface data . however id Search complete , You need to show the corresponding products . So we need to id Make a comparison , Make sure that the input id There are goods . After all, you can't manually input 100% correctly , So the program needs to deal with
  • Find the same element 
let arr1 = [1, 2, 5];
let arr2 = [1, 3, 4, 2];
function compare(arr1, arr2) {
    
  return arr1.filter((v) => {
    
    return arr2.includes(v);
  });
}
console.log(compare(arr1, arr2)); // [1, 2]  Find the same element

except includes You can also use indexOf

let arr1 = [1, 2, 5];
let arr2 = [1, 3, 4, 2];
function compare(arr1, arr2) {
    
  return arr1.filter((v) => {
    
    return arr2.indexOf(v) !== -1;
  });
}
console.log(compare(arr1, arr2));

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