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Let's talk about our next developer fundamentals, and this one is understanding data structures.

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A really good programmer is a programmer that is able to decide what data structure to use when up until

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now we've learned about dictionaries and lists and we'll learn about a couple more throughout the course.

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But a really good programmer, a programmer who's experienced is able to understand what the tradeoffs

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are, when to use what.

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And although I can give you a list of this is when you should do this and this is when you should use

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maybe dictionaries.

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The thing is, this takes practice and experience.

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So throughout our course and then the exercises that we're going to do, the projects we're going to

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build at the end, I hope that this idea of understanding when to use what data structure makes sense

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to you.

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But let's go back to our example.

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When you use a list and when should you use a dictionary?

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Well, the first thing we have to realize that a dictionary is not sorted, write a list has order,

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it has zero one indexes, so on and so forth, a dictionary has no order.

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So maybe if you want to have a list of people in line at your shop, well, you should probably use

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a list.

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But maybe you have a user that is playing a game and that user has first name, maybe weapons, maybe

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an H that doesn't have to be ordered.

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So you might use a dictionary.

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Also, you'll notice that dictionaries hold more information than lists.

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Right, because lists only have that single value that is a list has the index and then whatever the

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value is.

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And here we have a dictionary inside of a list which is holding a lot of information.

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Deep down, a list is simply an index and some sort of a value here.

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Right.

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Versus a dictionary that holds a lot more information.

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It holds a key.

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So this could be the weapons of that user.

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Hello.

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Can be the greeting of the user maybe is.

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Magic is another information about that user, so we're able to have both keys and values in a dictionary,

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so it holds a lot more information.

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And as we learn different data structures, you'll have these different pros and cons, you'll start

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to understand as to when to use what.

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All right, there's another developer, fundamentals I'll see in the next one by.