The Modern JavaScript Bootcamp (2019) - Searching Arrays: Part II

The video tutorial covers array methods in JavaScript, focusing on indexOf and findIndex. It explains how to create a function to find notes by title and modify it for case-insensitive searches. The tutorial also introduces the find method, which simplifies retrieving items from arrays. A challenge is presented to convert an array of strings to objects and create a function to delete items by text value.

Why is 'findIndex' preferred over 'indexOf' for arrays of objects?

• Because 'indexOf' is deprecated.

• Because 'findIndex' is faster.

• Because 'indexOf' uses strict equality which is not suitable for objects.

• Because 'findIndex' can only be used with numbers.

What does the 'findNote' function return if a note is not found?

• A default note object

• An empty string

• Undefined

• The index of the note

How can you make a search case-insensitive in JavaScript?

• By using the 'strictEqual' method

• By using the 'toLowerCase' method on both strings

• By using the 'toUpperCase' method on both strings

• By using the 'caseInsensitive' method

What is the main advantage of using the 'find' method over 'findIndex'?

• It can only be used with strings.

• It returns the item itself rather than its index.

• It is faster than 'findIndex'.

• It returns the index of the found item.

What is the result of a 'find' method call if no match is found?

• It returns null.

• It returns undefined.

• It throws an error.

• It returns the first item.

What should the 'deleteToDo' function do if no match is found?

• Do nothing

• Add a new item to the array

• Return an error message

• Delete the first item in the array

What is the purpose of converting an array of strings to an array of objects in the challenge?

• To make the array immutable

• To make the array easier to sort

• To add more properties to each to-do item

• To reduce the size of the array

Which method is used to remove an item from an array by its index?

• remove

• slice

• split

• splice

What does the 'splice' method require to remove an item?

• The type of the item

• The length of the array

• The index and the number of items to remove

• The value of the item

What is a key consideration when modifying arrays in functions?

• Arrays are passed by reference.

• Arrays are immutable.

• Arrays cannot be modified.

• Arrays are passed by value.