JS Closure (Example 2)

js-closure-example-2.js

const playWithArray = () => {
  let privateArray = [];

  const addItem = (item) => {
    privateArray.push(item);
  }
  
  const removeItem = (index) => {
    privateArray.splice(index, 1);
  }

  return {
    insert: (item) => {
      addItem(item);
    },
    removeAtIndex: (index) => {
      removeItem(index);
    },
    value: () => {
      return privateArray;
    }
  };
};

const arrayApi = playWithArray();
console.log('arrayApi: ', arrayApi.value()); // []

arrayApi.insert('1');
arrayApi.insert('2');
arrayApi.insert('3');
arrayApi.insert('4');
console.log('arrayApi: ', arrayApi.value()); // ["1", "2", "3", "4"]

arrayApi.removeAtIndex(2);
console.log('arrayApi: ', arrayApi.value()); // ["1", "2", "4"]

arrayApi.removeAtIndex(2);
console.log('arrayApi: ', arrayApi.value()); // ["1", "2"]