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How do I get the object if it exists, or None if it does not exist?
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In this case, no Error is raised if there is more than one match.
– Konstantin Schubert
Apr 28 '15 at 20:54
7
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Declaring an enum within a class
...некоторый код
break;
}
Color2 c2 = Color2::Green;
c2 = c; //error
c2 = 3; //error
if (c2 == Color::Red ) {} //error
If (c2) {} error
I create macro to facilitate usage:
#define DEFINE_SIMPLE_ENUM(EnumName, seq) \
struct EnumName {\
enum type \
{ \
BOOST_PP_SEQ_FOR_EACH_...
“A lambda expression with a statement body cannot be converted to an expression tree”
In using the EntityFramework , I get the error " A lambda expression with a statement body cannot be converted to an expression tree " when trying to compile the following code:
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How to sort with lambda in Python
In Python, I am trying to sort by date with lambda. I can't understand my error message. The message is:
4 Answers
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Unauthorised webapi call returning login page rather than 401
...sed for controllers with views. Http.AuthorizeAttribute will return a 401 error if authorization fails and Mvc.AuthorizeAttribute will redirect to the login page.
Updated 11/26/2013
So it appears things have drastically changed with MVC 5 as Brock Allen pointed out in his article. I guess the OW...
How can I efficiently download a large file using Go?
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I'll assume you mean download via http (error checks omitted for brevity):
import ("net/http"; "io"; "os")
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out, err := os.Create("output.txt")
defer out.Close()
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resp, err := http.Get("http://example.com/")
defer resp.Body.Close()
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n, err := io.Copy(out,...
How do I assert an Iterable contains elements with a certain property?
... This solution waste the possibility to show an appropriate error message.
– Giulio Caccin
May 6 '19 at 11:43
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How to create .ipa file using Xcode?
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Thanks, this helped, but I get these two errors when performing "Archive" on Xcode 10.1: clang: error: -ffunction-sections is not supported with -fembed-bitcode, clang: error: -fdata-sections is not supported with -fembed-bitcode. Would you help, please?
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How can I make an “are you sure” prompt in a Windows batchfile?
...ers read from STDIN) specified after option /C (and Ctrl+C) and outputs an error beep if the user presses a wrong key.
CHOICE does not require pressing any other key than one of the acceptable ones. CHOICE exits immediately once an acceptable key is pressed while SET /P requires that the user finish...
What is Mocking?
...h a JSON response.
Your app is suppose to work for all of them (in case of errors, your app should throw its expected error). What you do with mocking is you create 'imaginary—similar to real' network responses (like a 200 code with a JSON file) and test your code without 'making the real network ...