Question 215273 in Javascript Question posted in
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Javascript – JSON nested arrays

I have this array nested in another array. I need the processId within the processes array.

I have this and it is not doing the job. I am missing some operator. Variables processIds and processes have the same data.

    "statusIds" :[
            ],
     "menuItems": [
            {
                "menuId": 64,
                "processes": [
                    {
                        "processId": 117,
                        "otherids": [
                            8,
                            3
                        ],
                        "other": []
                    }
                ],
               
                "forms": []
            },
            {
                "menuId": 605,
                "processes": [],
                "forms": []
            }
            ],


    for (let x = 0; x < menuItems.length; x++) {
        let p=menuItems[x].processes
        processIds.push(...p);
     
        
    }
    console.log(processIds)  
    for (let y = 0; y < processIds.length; y++) {
        let p1=processIds[y]
        processes.push(p1)
        
    }   
    console.log(processes)
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2

Answers


  1. 0

    If you have the menuItems array assigned to the variable menuItems and you’re just trying to pull out the process ids:

    const processIds = menuItems.flatMap(
  menuItem => menuItem.processes.map(
    process => process.processId
  )
);
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  2. 0

    Changed to line : let p1 = processIds[y].processId

    const menuItems = [{
    "menuId": 64,
    "processes": [{
      "processId": 117,
      "otherids": [
        8,
        3
      ],
      "other": []
    }],
    "forms": []
  },
  {
    "menuId": 605,
    "processes": [],
    "forms": []
  }
];

let processIds = [];
let processes = [];
for (let x = 0; x < menuItems.length; x++) {
  let p = menuItems[x].processes;
  processIds.push(...p);
}
console.log("processIds : ", processIds)
for (let y = 0; y < processIds.length; y++) {
  let p1 = processIds[y].processId; // added .processId
  processes.push(p1)

}
console.log("processes : ", processes)
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