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How to determine whether an object has a given property in JavaScript
...throw new Error("IllegalArgumentException");
}
alert("ok");
}
f({req1: 123}); // error
f({req1: 123, req2: 456}); // ok
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How to parse a string to an int in C++?
... problem: what if the caller needs to distinguish between bad input (e.g. "123foo") and a number that is out of the range of int (e.g. "4000000000" for 32-bit int)? With stringstream, there is no way to make this distinction. We only know whether the conversion succeeded or failed. If it fails, we h...
How can I pass a member function where a free function is expected?
...
There isn't anything wrong with using function pointers. However, pointers to non-static member functions are not like normal function pointers: member functions need to be called on an object which is passed as an implicit argument to the function. The signature...
How can I create a simple message box in Python?
...lled EasyDialogs. There is also a (ctypes based) windows version at http://www.averdevelopment.com/python/EasyDialogs.html
If it matters to you: it uses native dialogs and doesn't depend on Tkinter like the already mentioned easygui, but it might not have as much features.
Turn a simple socket into an SSL socket
...os/ssl/ with example code in C++. Now it's available only via the history:
https://github.com/openssl/openssl/tree/691064c47fd6a7d11189df00a0d1b94d8051cbe0/demos/ssl
You probably will have to find a working version, I originally posted this answer at Nov 6 2015. And I had to edit the source -- not ...
What does “where T : class, new()” mean?
...gt;
where T : class, new()
{
}
class Checks
{
INewable<int> cn1; // ALLOWED: has parameterless ctor
INewable<string> n2; // NOT ALLOWED: no parameterless ctor
INewable<MyStruct> n3; // ALLOWED: has parameterless ctor
INewable<MyClass1> n4; // ALLOWED: has...
Downloading a large file using curl
...y copying contents, makes a shorter code. Neither this nor that works with https (unless you stipulate a $context). Concerting procedural style - file functions aren't quite OOP too, and if you put curl options in an array, it'll look way cleaner anyway.
– ashein
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File system that uses tags rather than folders?
...ntic filesystem for Linux and BSD"
project under active development
http://www.tagsistant.net/
Leaftag - "Tagging for the Linux desktop"
another implementation, last release 2006
http://www.chipx86.com/w/index.php/Leaftag
On integration with OSes, I dont think it should be that difficult. OSes are...
LISTAGG in Oracle to return distinct values
...t useful:
with test_data as
(
select 'A' as col1, 'T_a1' as col2, '123' as col3 from dual
union select 'A', 'T_a1', '456' from dual
union select 'A', 'T_a1', '789' from dual
union select 'A', 'T_a2', '123' from dual
union select 'A', 'T_a2', '456' from dual
union select 'A', 'T_a2', '111' fr...
How to properly assert that an exception gets raised in pytest?
How to make pytest print traceback, so I would see where in the whatever function an exception was raised?
11 Answers
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