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What is the difference between NaN and None?
I am reading two columns of a csv file using pandas readcsv() and then assigning the values to a dictionary. The columns contain strings of numbers and letters. Occasionally there are cases where a cell is empty. In my opinion, the value read to that dictionary entry should be None but instead ...
Turn a simple socket into an SSL socket
...ions(sslctx, SSL_OP_SINGLE_DH_USE);
int use_cert = SSL_CTX_use_certificate_file(sslctx, "/serverCertificate.pem" , SSL_FILETYPE_PEM);
int use_prv = SSL_CTX_use_PrivateKey_file(sslctx, "/serverCertificate.pem", SSL_FILETYPE_PEM);
cSSL = SSL_new(sslctx);
SSL_set_fd(cSSL, newsockfd );
//Here is the S...
Is there a performance difference between i++ and ++i in C?
... f()
{
int i;
for (i = 0; i < 100; i++)
g(i);
}
The files are the same, except for ++i and i++:
$ diff i++.c ++i.c
6c6
< for (i = 0; i < 100; i++)
---
> for (i = 0; i < 100; ++i)
We'll compile them, and also get the generated assembler:
$ gcc -c i++.c +...
How slow are .NET exceptions?
...erting data from a user. It's appropriate when reading a machine-generated file, where failure means "The file isn't in the format it's meant to be, I really don't want to try to handle this as I don't know what else might be wrong."
When using exceptions in "only reasonable circumstances" I've nev...
In absence of preprocessor macros, is there a way to define practical scheme specific flags at proje
...ags appropriately all the time for each language.
For ours, we declared a file in ObjC
PreProcessorMacros.h
extern BOOL const DEBUG_BUILD;
In the .m
PreProcessorMacros.m
#ifdef DEBUG
BOOL const DEBUG_BUILD = YES;
#else
BOOL const DEBUG_BUILD = NO;
#endif
Then, in your Objective-C Br...
Should I use #define, enum or const?
...ng them in a namespace is cool. If they are declared in your CPP or header file, their values will be inlined. You'll be able to use switch on those values, but it will slightly increase coupling.
Ah, yes: remove the static keyword. static is deprecated in C++ when used as you do, and if uint8 is a...
When to use MongoDB or other document oriented database systems? [closed]
...nd and recently included MongoDB for storing all meta-information of the files, because MongoDB better fits the requirements. For example: photos may have Exif information, videos may have audio-tracks where we to want to store the meta-information of, too. Videos and vector-graphics don't share...
Create a custom event in Java
...be main, and set that class as the ${Main-Class} variable in the build.xml file:
4 Things needed on throwing side code:
import java.util.*;//import of java.util.event
//Declaration of the event's interface type, OR import of the interface,
//OR declared somewhere else in the package
interface Thr...
Ignore Xcode warnings when using Cocoapods
...
Add to your Podfile:
platform :ios
# ignore all warnings from all pods
inhibit_all_warnings!
# ignore warnings from a specific pod
pod 'FBSDKCoreKit', :inhibit_warnings => true
Then execute: pod install
...
How can I set the Secure flag on an ASP.NET Session Cookie?
...or though, but it all worked if I added a system.web section to the config file and put the setting in there.
– Eborbob
Nov 23 '17 at 9:32
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