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Mark Hockridge
258 PointsGetting an error compiling
I'm getting an error compiling this. Having difficulty with the function removeValueForKey. What am I missing or doing wrong?
let currencies = ["US":"Dollar","UK":"Pound","JP":"Yen"]
let ukCurrency = currencies.removeValueForKey("UK")
2 Answers
Sara Chicazul
7,475 PointsRemember that there are two keywords you can use to create identifiers: var and let. One of them creates a variable, which can be changed after it is created, and one creates a constant, which cannot be changed.
The dictionary method removeValueForKey() removes an element from the dictionary. How should you define currencies so you can add and remove values from it?
johnhenri
42,259 Points let currencies = ["US":"Dollar","UK":"Pound","JP":"Yen"]
In your code currencies is a constant and can not be altered.
You need to change currencies into a variable (var)
right answer:
var currencies = ["US":"Dollar","UK":"Pound","JP":"Yen"]
let ukCurrency = currencies.removeValueForKey("UK")
Mark Hockridge
258 PointsMark Hockridge
258 Pointsthank you for your response but the first task specifically to create a constant. I then tried to change it to a variable in the next task but wouldn't let me do this.
Mark Hockridge
258 PointsMark Hockridge
258 Pointsthank you for your response but the first task specifically to create a constant. I then tried to change it to a variable in the next task but wouldn't let me do this.
Mark Hockridge
258 PointsMark Hockridge
258 Pointsthank you for your response but the first task specifically to create a constant. I then tried to change it to a variable in the next task but wouldn't let me do this.
Mark Hockridge
258 PointsMark Hockridge
258 Pointsthank you for your response but the first task specifically to create a constant. I then tried to change it to a variable in the next task but wouldn't let me do this.
Mark Hockridge
258 PointsMark Hockridge
258 Pointsthank you for your response but the first task specifically to create a constant. I then tried to change it to a variable in the next task but wouldn't let me do this.