filter typescript

1ngOnInit() {
2  this.booksByStoreID = this.books.filter(
3          book => book.store_id === this.store.id);
4}

1<div>
2  {people.filter(person => 
3    person.age < 60).map(filteredPerson => (
4    <li>
5      {filteredPerson.name}
6    </li>
7  ))}
8</div>

1const object = {
2  firstAttribute: 'firstValue',
3  secondAttribute: 'secondValue'
4};  
5
6objectList.filter(o -> o.firstAttribute === 'firstValue'); 

1var numbers = [1, 3, 6, 8, 11];
2
3var lucky = numbers.filter(function(number) {
4  return number > 7;
5});
6
7// [ 8, 11 ]

1//ES6
2let greaterTen = numbers.filter(number => { number > 10 });
3console.log(greaterTen); // []
4
5// with return
6let greaterTen = numbers.filter(number => number > 10 ); // return implicito
7console.log(greaterTen); // [23, 12, 45, 78, 11, 10.1, 84]
8
9// ES5
10var greaterTen = numbers.filter(function(){ 
11  number > 10 
12});
13console.log(greaterTen); // []
14
15// with return
16var greaterTen = numbers.filter(function(){ 
17  return number > 10 
18});
19console.log(greaterTen);  // [23, 12, 45, 78, 11, 10.1, 84]

1this.booksByStoreID = this.books.filter(book => book.store_id === this.store.id);