js object search by key code example

Example 1: javascript find object in array by property value

const fruits = ['apple', 'banana', 'grapes', 'mango', 'orange'];

const filterItems = (needle, heystack) => {
  let query = needle.toLowerCase();
  return heystack.filter(item => item.toLowerCase().indexOf(query) >= 0);
}

console.log(filterItems('ap', fruits)); // ['apple', 'grapes']
console.log(filterItems('ang', fruits)); // ['mango', 'orange']

Example 2: object javascript match by property value

const inventory = [
  {name: 'apples', quantity: 2},
  {name: 'bananas', quantity: 0},
  {name: 'cherries', quantity: 5}
];

function isCherries(fruit) { 
  return fruit.name === 'cherries';
}

console.log(inventory.find(isCherries)); 
// { name: 'cherries', quantity: 5 }