基于单独的对象键、值过滤对象数组

Question

I have the array of people below:

  const FIRST_ARRAY = [
    {
      name: 'Simon',
      age: 32,
      occupation: 'Student'
    },
    {
      name: 'Vera',
      age: 22,
      occupation: 'Developer'
    }
  ];

I would like to filter the array to produce a separate array based on a 'filters' object.

For example if my filters are:

  const FILTERS = {
    age: 32,
    name: 'John',
    occupation: ''
  };

The new array should be empty as no people in the array have the combination of 32 and John. However if my filters are:

 const FILTERS = {
    age: 32,
    name: 'Simon',
    occupation: ''
  }

The new array of people returned will be:

 const NEW_ARRAY = [
    {
      name: 'Simon',
      age: 32,
      occupation: 'Student'
    }
  ];

How can I filter the array of people by iterating over the 'filters' object values? Bare in mind the filters keys and values will dynamically changing all the time.

Answer 1

You could filter as follows:

 const FIRST_ARRAY = [ { name: 'Simon', age: 32, occupation: 'Student' }, { name: 'Vera', age: 22, occupation: 'Developer' } ]; const FILTERS = { name: 'Simon', age: 32, occupation: '' }; const filtered = FIRST_ARRAY.filter(person => Object.entries(FILTERS) .every(([key, val]) => val !== '' ? person[key] === val : true)); console.log(filtered);

Answer 2

You can use the function filter and the function every to check that every key-value are equal to the FILTERS values.

Assuming when within the FILTERS a value is empty then skip it

 const FIRST_ARRAY = [{name: 'Simon',age: 32,occupation: 'Student'},{name: 'Vera',age: 22,occupation: 'Developer'}], FILTERS = {age: 32,name: 'Simon',occupation: ''}, keys = Object.keys(FILTERS), result = FIRST_ARRAY.filter(o => keys.every(k => FILTERS[k] === '' || FILTERS[k] === o[k])); console.log(result);

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

 const FILTERS = { age: 32, name: 'John', occupation: '' };

Answer 3

You can try something like:

 function compare(item, filter) { for (var property in filter) { if (filter.hasOwnProperty(property)) { let value = filter[property]; return item.hasOwnProperty(property) && item[property] != '' && value == item[property]; } } } const DATA = [ { name: 'Simon', age: 32, occupation: 'Student' }, { name: 'Vera', age: 22, occupation: 'Developer' } ]; const filter = { age: 32, name: 'Simon', occupation: '' }; let result = DATA.filter(function(item) { return compare(item, filter); }) console.log(result);