Thank you for your answer, but as I've said, I'm looking for a ready to use
solution right from the Dictionary data type. Not using custom function or
extension, neither bridging with NSMutableDictionary. Actually, as I'm now
learning Swift, I write my learning process into a Swift blog (but in my local
language). I was surprised to find that dictionary doesn't have method for this
simple operation. I was expecting it would be as easy as using + operator like
in array data type.
–Mr Bee
Pada Jumat, 11 November 2016 16:31, Michael Nisi <[email protected]>
menulis:
For example, you might want to merge values:
let d1 = ["Apples": 20, "Oranges": 13]let d2 = ["Oranges": 3, "Cherries": 9]
let d3 = [d1, d2].reduce([String : Int]()) { acc, d in var dx = acc for entry
in d { let key = entry.key guard dx[key] == nil else { dx[key]! +=
entry.value continue } dx[entry.key] = entry.value } return dx}
print(d3) // ["Cherries": 9, "Apples": 20, "Oranges": 16]
On Fri, Nov 11, 2016 at 9:14 AM, Ray Fix via swift-users
<[email protected]> wrote:
Hi Mr Bee,
The reason I don’t think it is provided is because it is difficult to know what
to do when keys collide. You could easily write such a thing and decide your
own policy. For example:
let d1 = ["Apples": 20, "Oranges": 13]let d2 = ["Oranges": 3, "Cherries": 9]
extension Dictionary { func merged(with another: [Key: Value]) -> [Key:
Value] { var result = self for entry in another {
result[entry.key] = entry.value } return result }}
let result = d1.merged(with: d2)
On Nov 11, 2016, at 12:05 AM, Mr Bee via swift-users <[email protected]>
wrote:
Hi,
I'm using Swift v3 on an El Capitan machine. I want to merge a dictionary into
another compatible dictionary. However, I couldn't find addEntries function in
the dictionary instance, like it was on NSMutableDictionary
(https://developer.apple.com/ reference/foundation/ nsmutabledictionary).
Does that mean that Swift standard library won't provide such similar function
for native Swift dictionary? Or is there any other way of doing that natively?
I mean using the built-in Swift's native dictionary function
(https://developer.apple.com/ reference/swift/dictionary), no need to write a
custom function, or bridging to NSMutableDictionary.
Thank you.
Regards,
–Mr Bee
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