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iOS Swift Basics (retired) Collections What is a Dictionary?

Josh Smith
Josh Smith
1,049 Points
Posted by Josh Smith
Josh Smith
1,049 Points

I don't know why I'm not assigning the value of UK currency to it's new constant ukCurrency correctly

I've tried 10s of combinations getting the value of UK into it's new constant of ukCurrency but I'm not cracking it...?

dictionaries.swift 
let currencies = ["US": "Dollar", "UK": "Pound", "JP": "Yen"]

currencies["UK"] = ukCurrency

1 Answer

Jhoan Arango
Jhoan Arango
14,575 Points
Jhoan Arango
Jhoan Arango
14,575 Points

Hello Josh:

Think right to left when coding, or at least that’s how I see it and it helps me. For example

/*
When you are declaring a constant or a variable and then giving it a value
it looks something like this.
*/

var someVariable = "Value"


// so look at it this way.
//   Holds Value  <---- Value

var someVariable = "Value"

// Now someVariable is holding the value

Now in your challenge. currencies[“UK”] returns a value, and we want to assign that value to a constant. 

/*
 Here we are declaring a constant named “ukCurrency”
 and giving it the “UK” value, which in this case is “Pound”, because
 that’s what the dictionary returns from the key “UK”. 
*/

let ukCurrency = currencies["UK"]

I hope this crazy explanation helps you a bit. I learn in a visual manner, so I have to see things in a different way lol.

Josh Smith
Josh Smith
1,049 Points
Josh Smith
Josh Smith
1,049 Points

Dude thanks so much Jhoan! Really appreciate you taking the time to do lay it all out for me like that. I was trying so many different combinations in the end, I got close haha but obviously didn't get the nail!

Thanks man :D