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how does array[100] = {0} set the entire array to 0?
...the elements that don't have a specified value, the compiler initializes pointers to NULL and arithmetic types to zero (and recursively applies this to aggregates).
The behavior of this code in C++ is described in section 8.5.1.7 of the C++ specification (online draft of C++ spec): the compiler ag...
Powershell v3 Invoke-WebRequest HTTPS error
...tePolicy {
public bool CheckValidationResult(
ServicePoint srvPoint, X509Certificate certificate,
WebRequest request, int certificateProblem) {
return true;
}
}
"@
[System.Net.ServicePointManager]::CertificatePolicy = New-Object TrustAllCertsPo...
What is tail call optimization?
...earn more about this, I suggest reading the first chapter of Structure and Interpretation of Computer Programs.
– Kyle Cronin
Nov 22 '08 at 16:05
15
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What should I do if two libraries provide a function with the same name generating a conflict?
...
Under Windows, you could use LoadLibrary() to load one of those libraries into memory and then use GetProcAddress() to get the address of each function you need to call and call the functions through a function pointer.
e.g.
HMODULE lib = LoadLibrary("foo.dll");
void *p = GetProcAddress(lib, "bar...
Volatile boolean vs AtomicBoolean
...
They are just totally different. Consider this example of a volatile integer:
volatile int i = 0;
void incIBy5() {
i += 5;
}
If two threads call the function concurrently, i might be 5 afterwards, since the compiled code will be somewhat similar to this (except you cannot synchronize on...
Unit testing that events are raised in C# (in order)
...Method]
public void Test_ThatMyEventIsRaised()
{
Dictionary<string, int> receivedEvents = new Dictionary<string, int>();
MyClass myClass = new MyClass();
myClass.PropertyChanged += delegate(object sender, PropertyChangedEventArgs e)
{
if (receivedEvents.ContainsK...
Alarm Manager Example
...ge yourPackage;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.PowerManager;
import android.widget.Toast;
public class Alarm extends BroadcastReceiver
{ ...
What's the purpose of using braces (i.e. {}) for a single-line if or loop?
...
Let's attempt to also modify i when we increment j:
int j = 0;
for (int i = 0 ; i < 100 ; ++i)
if (i % 2 == 0)
j++;
i++;
Oh no! Coming from Python, this looks ok, but in fact it isn't, as it's equivalent to:
int j = 0;
for (int i = 0 ; i < 100 ; ++...
How to reliably guess the encoding between MacRoman, CP1252, Latin1, UTF-8, and ASCII
...ct thing would be to guess the encoding, then use the native2ascii tool to convert all non-ASCII characters to Unicode escape sequences.
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FIND_IN_SET() vs IN()
... (attachedCompanyIDs)
attachedCompanyIDs is a scalar value which is cast into INT (type of companyID).
The cast only returns numbers up to the first non-digit (a comma in your case).
Thus,
companyID IN ('1,2,3') ≡ companyID IN (CAST('1,2,3' AS INT)) ≡ companyID IN (1)
In PostgreSQL, you c...