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Let's talk about zip.

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How can we use zip.

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Well let's create a new function and the zip function works kind of like a zipper.

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We need to lists or to iterate balls and we can zip them together.

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Let me show you what I mean.

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Let's say I have my list and then your list and this your list will have 10 20 and 30.

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Make sure that it's a list.

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There you go and in here with the zip function I can simply run zip and in here I give it as many it

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troubles as I want.

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In our case two edibles.

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So I'm going to give it my list and your list.

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Let's close that out.

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Add one more bracket and in fact click Run

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what just happened here.

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Zip like a zipper takes the two it dribbles and grabs the first item from each and zips them together

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like a zipper.

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So 1 and 10 get added to a couple together then two and 20 get added to topple together and then three

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and 30 get added to a couple together.

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What if this was a couple like this and I click Run does it matter.

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It's an ignorable it's going to zip the items together.

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Now this may not seem that useful to you now.

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It's actually a very important function that because it's so generic can be used in so many different

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things.

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For example if we had from a database we collected all the user names from one column in a database

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and then maybe from another part of the database we collect all of the phone numbers and they were all

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in the same order.

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Well we can combine these into a temple using zip that has the user name and the phone numbers attached

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to them and create a whole new data structure and if I had a another list here let's say their list

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and this one has five four and three I can add again their list as well.

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And if I click Run you see that I can keep zipping things together.

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So zip iterate over each one of these lists or data structures and zip them together once again noticing

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that we don't modify any of our current data.

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Instead we create a whole new one.

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Very very nice.

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What about reduce.

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Let's find out more in the next video.