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Python naming conventions for modules
...and so I'd always have to name my instances something unnatural like client_instance. What do you think of this problem?
– Ray
Jun 1 '16 at 10:59
3
...
Returning a C string from a function
... you move over to C++ you'll use similar strategies:
class Foo
{
char _someData[12];
public:
const char* someFunction() const
{ // The final 'const' is to let the compiler know that nothing is changed in the class when this function is called.
return _someData;
}
}
... but...
Detect if the app was launched/opened from a push notification
...pplication wake up most recently?
func applicationWillEnterForeground(_ application: UIApplication) {
// time stamp the entering of foreground so we can tell how we got here
wakeTime = Date()
}
func application(_ application: UIApplication, didReceiveRemoteNotification userIn...
SVN: Is there a way to mark a file as “do not commit”?
...nore-on-commit is already defined. tortoisesvn.net/docs/release/TortoiseSVN_en/…
– tjmoore
Jun 19 '12 at 8:50
...
Why is creating a Thread said to be expensive?
...of OpenJDK 6 on Linux, the thread stack is allocated by the call to pthread_create that creates the native thread. (The JVM does not pass pthread_create a preallocated stack.)
Then, within pthread_create the stack is allocated by a call to mmap as follows:
mmap(0, attr.__stacksize,
PROT_REA...
Cannot use ref or out parameter in lambda expressions
... if (tokenDefinition.LeftDenotation != null)
token._led = tokenDefinition.LeftDenotation(token);
if (tokenDefinition.NullDenotation != null)
token._nud = tokenDefinition.NullDenotation(token);
token.Identifier = tokenDefinition.Identifi...
Symbolicating iPhone App Crash Reports
...above (using cd command)
Run atos -arch armv7 -o APPNAME.app/APPNAME MEMORY_LOCATION_OF_CRASH. The memory location should be the one at which the app crashed as per the report.
Ex: atos -arch armv7 -o 'APPNAME.app'/'APPNAME' 0x0003b508
This would show you the exact line, method name which resul...
How to test that no exception is thrown?
...write, will work.
Such a method call can look like this: existingUserById_ShouldReturn_UserObject. If this method fails (e.g.: an exception is thrown) then you know something went wrong and you can start digging.
By adding another test (nonExistingUserById_ShouldThrow_IllegalArgumentException) th...
What does .SD stand for in data.table in R
... may help you see what .SD is:
DT[ , .SD[ , paste(x, v, sep="", collapse="_")], by=y]
# y V1
# 1: 1 a1_b3_c5
# 2: 3 a2_b4_c6
Basically, the by=y statement breaks the original data.table into these two sub-data.tables
DT[ , print(.SD), by=y]
# <1st sub-data.table, called '.SD' while i...
Connect Java to a MySQL database
... as well.
CREATE DATABASE javabase DEFAULT CHARACTER SET utf8 COLLATE utf8_unicode_ci;
Create an user for Java and grant it access. Simply because using root is a bad practice.
CREATE USER 'java'@'localhost' IDENTIFIED BY 'password';
GRANT ALL ON javabase.* TO 'java'@'localhost' IDENTIFIED BY 'pa...