remove of null object-CodePudding

how can I not release data if two attributes are empty?

const fork = [
  { from: 'client', msg: null, for: null },
  { from: 'client', msg: '2222222222222', for: null },
  { from: 'server', msg: 'wqqqqqqqqqqqq', for: 'data/64.....' }
];

console.log(message)

These are three sample entries, in fact they are always replenished. And there are more.

I need to do this, if two attributes are empty then do not send if somewhere null then do not release this value

const fork = [
  { from: 'client', msg: null, for: null }, // remove line full
  { from: 'client', msg: '2222222222222', for: null }, // remove for
  { from: 'server', msg: null, for: 'data/64.....' } // remove msg
];
console.log(message)

CodePudding user response：

You could filter the array and map the rest.

const
    fork = [{ from: 'client', msg: null, for: null }, { from: 'client', msg: '2222222222222', for: null }, { from: 'server', msg: 'wqqqqqqqqqqqq', for: 'data/64.....' }];
    result = fork
        .filter(o => ['msg', 'for'].some(k => o[k] !== null))
        .map(o => Object.fromEntries(Object
            .entries(o)
            .filter(([, v]) => v !== null)
        ));

console.log(result);

.as-console-wrapper { max-height: 100% !important; top: 0; }

CodePudding user response：

const fork = [
  { from: 'client', msg: null, for: null },
  { from: 'client', msg: '2222222222222', for: null },
  { from: 'server', msg: 'wqqqqqqqqqqqq', for: 'data/64.....' }
];

const result = fork.map(item => {
  if (Object.values(item).filter(i => i === null).length > 1) return null
  const obj = {...item}
  for (const key in obj) {
    if (obj[key] === null) {
      delete obj[key]
    }
  }
  return obj
}).filter(item => item !== null)

console.log(result)