检查数组是否为空 - Postman - node.js

Question

I am getting the response in this format:

{
    "test1": [],
    "test2": [],
    "test3": [],
    "test4": null,
    "test5": []
}

After sending a request, this is the response i get.

And i want to check f. ex. does test1 is empty or not.

And if it is empty it's enough to just console log.

Answer 1

i think you are looking for this. using .length property of the array

 let response = { "test1": [], "test2": [], "test3": [], "test4": null, "test5": [] } if(response){ if(response.test1 && response.test1.length == 0) { console.log("array empty"); } }

Answer 2

use javascript array.length property.

  if(test1.length){
  //if array is not empty do something here
 }
 else{
       //array is empty..do something else

  {

Answer 3

you should run something like this

if (response){
    if (response["test1"] && response["test1"].length>0){
        //do stuff
    }

    if (response["test2"] && response["test2"].length>0){
        //do stuff
    }
    ...
}

Answer 4

let response = 
{
 "test1": [],
 "test2": [],
 "test3": [],
 "test4": null,
 "test5": []
}

if(response){
   // in your case, test4 is null, so you need to check if null value too
   // try console.log(response['test4'] === response['test1']) // should be false
   if(response.testX.length && response.testX !== null)
   {
      console.log("You're awesome!");
   }
}