I have a array of object ,

var  arr = [
  {qty_auth: "", resolution: "4", status: "", order: "1495"},
  {qty_sized: "1", resolution: "4", status: "", order: "1485"}
]

If first one is empty (ex:qty_auth),want to remove the object from the array on loop. The First one is dynamic key as qt_auth,qty_sized is dynamic

So the output must be

var  arr = [
  {qty_sized: "1", resolution: "4", status: "", order: "1495"}
]

CodePudding user response：

There is not particular sequence in an object in JS, but what you can do is check for the existence and filter out only the object that contain qty_auth or qty_sized and it should not be empty "". You can use filter

var arr = [
  { qty_auth: "", resolution: "4", status: "", order: "1495" },
  { qty_sized: "1", resolution: "4", status: "", order: "1485" },
];

const result = arr.filter((o) => o.qty_auth || o.qty_sized);
console.log(result);

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CodePudding user response：

try something like this

const filtered = arr.filter(({ qty_auth, qty_sized }) => (qty_auth || qty_sized));

CodePudding user response：

• Using Array#filter, iterate over the array
• In each iteration, check if the current object has a key starting with qty. You can do this using Object#keys, Array#find, and String#startsWith. If the key exists but its value is empty, return false

const arr = [ {qty_auth: "", resolution: "4", status: "", order: "1495"}, {qty_sized: "1", resolution: "4", status: "", order: "1485"} ];

const res = arr.filter(e => {
  const qtyKey = Object.keys(e).find(key => key.startsWith('qty'));
  if(qtyKey && !e[qtyKey]) return false;
  return true;
});

console.log(res);

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Note: the key order in javascript objects is undefined.

CodePudding user response：

As @EnricoMassone below pointed out, the order of objects entries here, which I iterate once I have my object from the array (the forEach loop) might not be the same as declared, so it may be a controversial method. FYI I check if the first object property is not empty and if so, I add the whole object to the array I return.

const removeEmpty = (arr) => {
    const arrToReturn = new Array();

    arr.forEach((obj) => {
        if (Object.entries(obj)[0][1] === '') continue;
        else arrToReturn.push(obj);
    });

    return arrToReturn;
}