xcode6 - Is .playground a swift file? Who can 'see' it? -


i'm trying figure out .playground file is. if it's source file, cannot (as far i've tried) seen other swift files in project, nor other .playground files or vice versa.

is project supposed have 1 such file? kind of swift file?

i know (.playground file) does, can't figure out how fits in project.

a .playground file bundle directory, can verified right clicking , selecting "show package contents".

it includes .swift file actual source code, can edited , .xcplayground file , .xctimeline file, opaque , can't edited through normal means.

you can add files it, such images , other resources use inside playground.

it's not necessary present in application projects. it's used solely place explore, without need create project.


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