JAVASCRIPT

javascript filter array multiple conditions

var filter = {
  address: 'England',
  name: 'Mark'
};
var users = [{
    name: 'John',
    email: 'johnson@mail.com',
    age: 25,
    address: 'USA'
  },
  {
    name: 'Tom',
    email: 'tom@mail.com',
    age: 35,
    address: 'England'
  },
  {
    name: 'Mark',
    email: 'mark@mail.com',
    age: 28,
    address: 'England'
  }
];


users= users.filter(function(item) {
  for (var key in filter) {
    if (item[key] === undefined || item[key] != filter[key])
      return false;
  }
  return true;
});

console.log(users)

javascript filter array multiple values

// use .filter and write multiple validations in the callback function

let numbers = [3, 7, 2, 15, 4, 9, 21, 14];

let filteredNumbers = numbers.filter(function (currentElement) {
  if (currentElement > 3 && currentElement < 17) {
    return true;
  }
});

console.log(filteredNumbers);

array filter with multiple conditions

var conditions = [];

 // Dynamically build the list of conditions
 if(startDateFilter) {
    conditions.push(function(item) { 
       return item.transdate >= startDateFilter.startDate;
    });
 };

 if(categoryFilter) {
     conditions.push(function(item) {
         return item.cateogry === categoryFilter.category;
     });
 };
 // etc etc