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Saturday, January 21, 2023

#33 Maps and Weak Maps | JavaScript Full Tutorial


 

In this lesson we're going to be learning all about Maps and Weak Maps. Maps are basically a collection of key data items, similar to an Object. The main difference between a Map and an object is that a Map allows keys of any type. In this lesson we learn about how to create and use Maps.

#32 Sets and Weak Sets | JavaScript Full Tutorial


 

In this lesson we're going to be learning all about Sets and Weak Sets. Sets are similar to Arrays except you can't have any duplicates. In this lesson we look at how to create and use them. 0:00 - Intro 0:35 - What is a Set? 1:32 - Creating a Set 1:42 - Adding values to a Set 3:10 - Deleting values in a Set 3:34 - Checking values in a Set 4:08 - Get number of values in a Set 4:21 - Clear all values in a Set 4:45 - Adding an Array to a Set 5:23 - What is a Weak Set? 5:48 - Creating a Weak Set 7:28 - Lesson Summary 7:57 - Lesson Tasks 9:35 - Coming up next/Outro

#31 JS Array Iterator Methods | JavaScript Full Tutorial


 

In this lesson we'll learn all about array iterator methods, we use iterator methods to loop over our array values and perform an action in the form of a function. Iterator methods are really important to know, as they can be used to do a variety of different things with arrays. 0:00 - Intro 0:25 - What are iterator methods? 0:41 - forEach() method 3:14 - map() method 6:31 - filter() method 8:03 - reduce() method 9:46 - some() method 11:24 - every() method 12:30 - find() method 13:45 - findIndex() method 14:54 - Lesson Tasks 18:00 - Coming up next/Outro


#30 How to use JS Array Methods | JavaScript Full Tutorial


 

In this lesson let's learn all about the various Array methods. Array methods enable us to do some really cool things with arrays, for e.g. we can use these methods to find certain values in our array, and to even add, delete and change values in our array.

Friday, January 20, 2023

#29 How to use JS Arrays | JavaScript Full Tutorial


 In this lesson we'll start learning about the object data types, beginning with arrays. Arrays are basically an ordered list of values. These values can be of any data type, so our array can be made up of numbers, strings, booleans, and even other arrays. In this lesson we learn all about how to write and use them.

0:00 - Intro/Quick review 1:02 - What is an array? 1:22 - Creating our first array 2:05 - Accessing an array 3:05 - Adding a value 3:37 - Deleting a value 5:15 - Replacing a value 6:15 - Creating a multi-dimensional array 7:25 - Lesson summary 8:07 - Tasks 10:14 - Coming up next/Outro

#28 For...of loop | JavaScript Full Tutorial


 In this lesson we finish up our understanding of loops by learning all about the for..of loop. First of all we'll understand how to write it and how it works, and then we'll look at the difference between the for...of loop and the for...in loop.

0:00 - Intro 0:38 - What is the for..of loop? 0:54 - Looping through an array 2:14 - Looping through a string 3:11 - The break keyword 4:07 - For..of vs. For..in 4:33 - Lesson summary 5:00 - Tasks 6:23 - Coming up next/Outro

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