How to remove a key-value pair from swift dictionary?

Question

I want to remove a key-value pair from a dictionary like in the example.

var dict: Dictionary<String,String> = [:]
//Assuming dictionary is added some data.
var willRemoveKey = "SomeKey"
dict.removePair(willRemoveKey) //that's what I need

Answer 1

You can use this:

dict[willRemoveKey] = nil

or this:

dict.removeValueForKey(willRemoveKey)

The only difference is that the second one will return the removed value (or nil if it didn't exist)

Swift 3

dict.removeValue(forKey: willRemoveKey)

Answer 2

Swift 5, Swift 4, and Swift 3:

x.removeValue(forKey: "MyUndesiredKey")

Cheers

Answer 3

dict.removeValue(forKey: willRemoveKey)

Or you can use the subscript syntax:

dict[willRemoveKey] = nil