javascript find value by key in array code example

Example 1: javascript find item in array of objects

var __POSTS = [ 
	{ id: 1, title: 'Apple', description: 'Description of post 1' }, 
	{ id: 2, title: 'Orange', description: 'Description of post 2' }, 
	{ id: 3, title: 'Guava', description: 'Description of post 3' }, 
	{ id: 4, title: 'Banana', description: 'Description of post 4' }
];

var __FOUND = __POSTS.find(function(post, index) {
	if(post.title == 'Guava')
		return true;
});

// On success __FOUND will contain the complete element (an object)
// On failure it will contain undefined  
console.log(__FOUND); // { id: 3, title: 'Guava', description: 'Description of post 3' }

Example 2: find method javascript

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 }