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

Anders Lund
Anders Lund
3,061 Points
Posted by Anders Lund
Anders Lund
3,061 Points

Dont understand how to Assign the value for key "UK" to a constant named ukCurrency.

dont know how to Assign the value for key "UK" to a constant named ukCurrency.

did not feel like he went thru it in the tut. might be just me :P

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

let ukCurrency = currencies[3]

3 Answers

kjvswift93
kjvswift93
13,515 Points

Remember that unlike an array in which you can reference a particular element based upon it's ordered position (or index), dictionaries are not ordered. The key-value pairs may appear in any order, so in order to "capture" a value in a dictionary, you need to use the name of it's respective key, in this case "UK" to capture the value "Pound", as opposed to using a number or index as you would in an array.