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PHP exec() vs system() vs passthru()
...n status"). Zero usually means it was successful, other values are usually error codes.
Other misc things to be aware of:
The shell_exec() and the backticks operator do the same thing.
There are also proc_open() and popen() which allow you to interactively read/write streams with an executing co...
How should I log while using multiprocessing in Python?
...w uses a queue for correct handling of concurrency, and also recovers from errors correctly. I've now been using this in production for several months, and the current version below works without issue.
from logging.handlers import RotatingFileHandler
import multiprocessing, threading, logging, sy...
Validate that a string is a positive integer
...(expect === undefined ? "" : !!expect === !!result ? " <= OK" : " <= ERROR ***")
);
}
gid("btn").addEventListener(
"click",
function() {
test(gid("text").value);
},
false
);
test("1", true);
test("1.23", false);
test("1234567890123", true);
test("123456...
Running multiple TeamCity Agents on the same computer?
...vise that you may have an issue with the new agent after installing it, an error like "Teamcity agent in disconnected state (Agent has unregistered (will upgrade))". This can be solved stopping the fisrt agent(or the other agents installed) and restarting the new from the services (on Windows/Window...
AES Encryption for an NSString on the iPhone
... aside from the extra comma in each call to CCCrypt() which caused compile errors.
A later comment on that post includes this adapted code, which works for me, and seems a bit more straightforward. If you include their code for the NSData category, you can write something like this: (Note: The prin...
unable to start mongodb local server
...mongodb local server with mongod command it failed to run and threw this error..
25 Answers
...
Effects of the extern keyword on C functions
...fine a file scope variable. For example,
extern int i = 4;
will give an error or warning, depending on the compiler.
Usage of extern is useful if you explicitly want to avoid definition of a variable.
Let me explain:
Let's say the file a.c contains:
#include "a.h"
int i = 2;
int f() { i++; ...
Programmatically open Maps app in iOS 6
...ly Circus, London, UK"
completionHandler:^(NSArray *placemarks, NSError *error) {
// Convert the CLPlacemark to an MKPlacemark
// Note: There's no error checking for a failed geocode
CLPlacemark *geocodedPlacemark = [placemarks objectAtIndex:0];
MKPlacemark ...
The default for KeyValuePair
... }
}
Usage:
// We have to set explicit default value '0' to avoid build error:
// Use of unassigned local variable 'intValue'
int intValue = 0;
long longValue = 12;
KeyValuePair<String, int> kvp1 = new KeyValuePair<String, int>("string", 11);
KeyValuePair<String, int> kvp2 = new...
ReSharper warns: “Static field in generic type”
...jority of cases, having a static field in a generic type
is a sign of an error. The reason for this is that a static field in a
generic type will not be shared among instances of different close
constructed types. This means that for a generic class C<T> which
has a static field X, the...