检查数组是否在 Angular 中有值

Question

I have to check if any of the "cuesData" has a value or length greater than 0. In my code below, i can only check the first array but not the others.

TS

checkValues(values) {
    const result = Object.values(values).every((value) => value[1].cuesData.length > 0);
    return result;
}

HTML

<div *ngIf="checkValues(values) === true">

JSON

  [
      [
        "videoData__1",
        {
          "id": 1,
          "title": "Pale Blue Dot",
          "stoppedAt": 97.834667,
          "cuesData": [
            {
              "startTime": 25.335678,
              "endTime": 35.335678,
              "description": "fqff"
            }
          ]
        }
      ],
      [
        "videoData__2",
        {
          "id": 2,
          "title": "Big Buck Bunny",
          "stoppedAt": 247.57881,
          "cuesData": []
        }
      ],
      [
        "videoData__3",
        {
          "id": 3,
          "title": "Elephants Dream",
          "stoppedAt": 404.585327,
          "cuesData": []
        }
      ]
]

Answer 1

Change,

checkValues(values) {
    const result = Object.values(values).every((value) => value[1].cuesData.length > 0);
    return result;
}

To

checkValues(values){
  const result = Object.values(values).some((value) => value[1].cuesData.length > 0);
  return result;
}

Working Stackblitz: https://stackblitz.com/edit/my-angular-starter-j4yypu

Here .every() method will check that all conditions should met but whereas some() method works that at least one condition has been true..

Stackblitz without cuesdata length: https://stackblitz.com/edit/my-angular-starter-cfpxa5

Answer 2

You can use some method for this:

*ngIf="CheckValues(values)"

function:

CheckValues(values : any[]){
   return values.some(v=>v[1].cuesData&&v[1].cuesData.length); //if any array has cuesData, some will return true
}

more about some : https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/some