Getting error while checking any one of object has some value using Javascript

Question

I am getting error while checking any object has some value from one array using Javascript. I am explaining my code below.

let arr = [
    {
      "config": "as",
      "payload": ""
    },
    {
      "config": "as",
      "payload": "xc"
    },
    {
      "config": "",
      "payload": "xc"
    },
    {
      "config": "",
      "payload": ""
    }
]

let isNext = true;

for(let i=0; i < arr.length; i++) {
  if(arr[i].config !== '' || arr[i].payload !=='') {
     isNext = false
     return;
  }else{
     isNext = true;
  }
}

console.log('next', isNext);

Here I have one array of object and each object has 2 key-value pair. I need inside array it will check if any one of object has some value for both config or payload then isNext will be false other wise it will be true. but as per this code I am getting the following error.

Uncaught SyntaxError: Illegal return statement"

Please help me to resolve this issue.

Is that inside a function? If not, what are you trying to return from? — jonrsharpe
– jonrsharpe, Commented Oct 12, 2021 at 10:43

Obaida Alhassan · Accepted Answer · 2021-10-12 10:45:53Z

1

Break the loop instead of using return, the return keyword used to return values from methods

return MDN

let arr = [
    {
      "config": "as",
      "payload": ""
    },
    {
      "config": "as",
      "payload": "xc"
    },
    {
      "config": "",
      "payload": "xc"
    },
    {
      "config": "",
      "payload": ""
    }
]

let isNext = true;

for(let i=0; i < arr.length; i++) {
  if(arr[i].config !== '' || arr[i].payload !=='') {
     isNext = false
     break;
  }else{
     isNext = true;
  }
}

console.log('next', isNext);

answered Oct 12, 2021 at 10:45

Obaida Alhassan

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Comments

Rama Salahat · Accepted Answer · 2021-10-12 10:50:50Z

1

you shouldn't have a return statement outside a function scope, if you're trying to escape the for loop use break instead.

answered Oct 12, 2021 at 10:50

Rama Salahat

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1 Comment

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user3713526 · Accepted Answer · 2021-10-12 10:56:52Z

Your code is strange because you have no result.
Maybe you want to find the first suitable object from your array?
So the code will be:

const arr = [
  {
    "config": "as",
    "payload": ""
  },
  {
    "config": "as",
    "payload": "xc"
  },
  {
    "config": "",
    "payload": "xc"
  },
  {
    "config": "",
    "payload": ""
  }
];

let result = null;
let isNext = true;

for(let i=0; i < arr.length; i++) {
  if(arr[i].config !== '' || arr[i].payload !=='') {
     isNext = false
     result = arr[i];
     break;
  }else{
     isNext = true;
  }
}

console.log('my result', result);

Or you want to check if any of elements are suitable for your condition you can make:

const result = arr.some(el => el.config || el.payload);

Or you can find and return the first suitable element:

const result = arr.find(el => el.config || el.payload);

Aditya Vashishtha · Accepted Answer · 2021-10-12 10:46:14Z

0

In you code you can replace return from break so it will go out from loop once condition satisfices.

for(let i=0; i < arr.length; i++) {
  if(arr[i].config !== '' || arr[i].payload !=='') {
     isNext = false
     break;
  }else{
     isNext = true;
  }
}

use break to step out from loop.

answered Oct 12, 2021 at 10:46

Aditya Vashishtha

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