Playground Editor: what does the "fixed" in view results mean?

Question

Created Sep ’19

Replies 4

Boosts 0

Participants 2

In the XCode Playground editor, there is result views at the right hand side after the code is executed in playground. I notice that some of the displayed variable values has a description "fixed". What does "fixed" mean in this context?

Thank you!

Answered by DTS Engineer in 381822022

I think posting some code can make what I am referring to clear:

It did indeed. Thanks.

In this context, the

(fixed)

is not a feature of the playground but a feature of

Calendar

. Consider this snippet:

import Foundation

let cal = Calendar.autoupdatingCurrent

It logs

gregorian (autoupdatingCurrent)

. In the world of

Calendar

, there are two types of calendars:

An auto-updating calendar tracks user settings. For example, if the user goes to Settings > General > Language & Region > Calendar and changes their calendar, the auto-updating calendar will start returning results based on that new calendar.
A fixed calendar is… well… fixed. Once you create a calendar value, it will continue return results based on that calendar, regardless of any user settings changes.

Share and Enjoy
—
Quinn “The Eskimo!”
Apple Developer Relations, Developer Technical Support, Core OS/Hardware

let myEmail = "eskimo" + "1" + "@apple.com"

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Answer 1

DTS Engineer OP

Apple

Sep ’19

I’m not entirely sure what you’re getting at here, so some questions:

Are all the variables that exhibit this behaviour of the same type?
What type (or types) are they?

Share and Enjoy
—
Quinn “The Eskimo!”
Apple Developer Relations, Developer Technical Support, Core OS/Hardware

let myEmail = "eskimo" + "1" + "@apple.com"

0

Answer 2

ssshhh OP

Sep ’19

Hi eskimo

I think posting some code can make what I am referring to clear:

// create calendar

var calGreg: Calendar

calGreg = Calendar(identifier: .gregorian)

var calBudd: Calendar

calBudd = Calendar(identifier: .buddhist)

After running in the playground, the result displayed at the right hand side for the two assignment statements are:

gregorian (fixed)

buddhist (fixed)

I am just wondering what does the "(fixed)" indicate.

Thank you.

0

Answer 3

DTS Engineer OP

Apple

Sep ’19

Accepted Answer

I think posting some code can make what I am referring to clear:

It did indeed. Thanks.

In this context, the

(fixed)

is not a feature of the playground but a feature of

Calendar

. Consider this snippet:

import Foundation

let cal = Calendar.autoupdatingCurrent

It logs

gregorian (autoupdatingCurrent)

. In the world of

Calendar

, there are two types of calendars:

An auto-updating calendar tracks user settings. For example, if the user goes to Settings > General > Language & Region > Calendar and changes their calendar, the auto-updating calendar will start returning results based on that new calendar.
A fixed calendar is… well… fixed. Once you create a calendar value, it will continue return results based on that calendar, regardless of any user settings changes.

Share and Enjoy
—
Quinn “The Eskimo!”
Apple Developer Relations, Developer Technical Support, Core OS/Hardware

let myEmail = "eskimo" + "1" + "@apple.com"

0

Answer 4

ssshhh OP

Sep ’19

Thank you for your explaination Eskimo!

0