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Swift variable decorations with “?” (question mark) and “!” (exclamation mark)
... Int = 1
// The type here is not "Int", it's "Optional Int"
var y: Int? = 2
// The type here is "Implicitly Unwrapped Optional Int"
var z: Int! = 3
Usage:
// you can add x and z
x + z == 4
// ...but not x and y, because y needs to be unwrapped
x + y // error
// to add x and y you need to do:
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Differences between ExpandoObject, DynamicObject and dynamic
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answered Aug 25 '10 at 11:57
SLaksSLaks
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Can Flask have optional URL parameters?
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answered Dec 25 '12 at 16:26
Audrius KažukauskasAudrius Kažukauskas
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How do you tell a specific Delayed::Job to run in console?
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answered Aug 4 '11 at 20:08
schizaschiza
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What exactly is Heroku?
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edited May 23 '17 at 11:47
Community♦
111 silver badge
answered Dec 29 '12 at 12:45
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Which exception should I raise on bad/illegal argument combinations in Python?
...edited Jun 16 at 16:19
Bonifacio2
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answered Nov 1 '08 at 23:37
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How to solve Permission denied (publickey) error when using Git?
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Convert dictionary to list collection in C#
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answered Oct 19 '10 at 12:58
Justin NiessnerJustin Niessner
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String Concatenation using '+' operator
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edited Apr 26 '12 at 20:51
answered Apr 26 '12 at 20:47
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Slow Requests on Local Flask Server
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Ok I figured it out. It appears to be an issue with Werkzeug and os's that support ipv6.
From t...