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Welcome back, this is lesson five on Simbel data types, these are relatively new, primitive data

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type that was added in twenty fifteen to JavaScript.

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Invoking the function symbol and this is a specific class, produces an anonymous, unique value.

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So this is a very, very interesting data type.

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Basically, you're going to use this to create a specific I.D. that you can use for any type of unique

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value purpose.

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OK, so let's take a look at this type of code here and see what it does.

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We're going to create a simple one and simple to notice that they're tied to the same type of information,

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the same description right here inside the quotes.

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And otherwise, these look exactly the same.

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But they're not going to be the same value because what symbol does is create a unique value for each

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time.

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So we'll show you what that looks like.

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OK, so we'll just let symbol one equal symbol and we're going to give this a description, OK?

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And the description is totally optional.

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It's not necessary at all.

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We're going to use these descriptions just for the purpose of showing you what's going on here.

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So we wanted to see whether or not these are the same.

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So we'll do a console log and we'll say SIM one is exactly the same as seem to OK.

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Now let's just see what happens.

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It's going to return false.

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Interesting.

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OK, and obviously what that means is if we check for the opposite, it's going to return.

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True.

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OK, are they even partially the same?

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No.

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OK, now let's see if we can actually see what this value shows.

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OK, when you consider this, it's not going to give you necessarily what you expect.

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It's going to give you this special symbol.

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Value and obviously, if we do the same thing here, it's going to look the same, but these are actually

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separate values.

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Remember, we checked to see if they were the same and they're not.

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So if we want to actually get them as the same value, then we'd have to convert them to string's.

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So if we convert both of them to string's.

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We can do like this and then check it, those are true because those both would show up as just symbols,

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simple like that.

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But what's nice about these is they create these unique values.

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Just like that, and if you wanted to access just the description you could by doing this so you can

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control just the description.

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And you get just the value that's there in the description.

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So, as you can see, I could change it.

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And it would change accordingly.

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OK, so let's change that back.

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Let's just for ease of understanding this, let's keep it that way.

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And then run that again, you can see symbolism.

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OK, so symbols are not used a lot, but you can use them as IDs in databases, as properties of objects,

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and we'll get into objects.

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OK, and that's it for DE.