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When should I use nil and NULL in Objective-C?
...ke a C pointer) in Objective-C. Like nil , NULL got no value nor address.
char *myChar = NULL;
struct MyStruct *dStruct = NULL;
So if there is a situation, when I need to check my struct (structure type variable) is empty or not then, I will use:
if (dStruct == NULL)
NSLog("The struct is emp...
Standard deviation of a list
... would expect. I couldn't edit the post as edits need to modify at least 6 chars...
– mknaf
Jan 6 '17 at 16:00
...
Best way to create custom config options for my Rails app?
...th_indifferent_access" allows you to access the values in the hash using a string key or with an equivalent symbol key.
eg.
APP_CONFIG['audiocast_uri_format'] => 'http://blablalba/blabbitybla/yadda'
APP_CONFIG[:audiocast_uri_format] => 'http://blablalba/blabbitybla/yadda'
Purely a convenie...
What are the differences in die() and exit() in PHP?
... have two exit functions now! Let's make it so that they both
can take a string or integer as an argument and make them identical!"
The end result is that this didn't really make things any "easier",
just more confusing. C and Perl coders will continue to use exit() to
toss an integer exi...
How to deal with floating point number precision in JavaScript?
...
toPrecision returns a string instead of a number. This might not always be desirable.
– SStanley
Mar 13 '16 at 23:42
7
...
How do I measure time elapsed in Java? [duplicate]
...will be used for the JAMon monitor, hence the call to thisJoinPoint.toShortString()):
public aspect MonitorAspect {
pointcut monitor() : execution(* *.ClassToMonitor.methodToMonitor(..));
Object arround() : monitor() {
Monitor monitor = MonitorFactory.start(thisJoinPoint.toShortStr...
Check if one IEnumerable contains all elements of another IEnumerable
...ter than the others. Thanks for the tip.
– Brandon Zacharie
Jul 18 '10 at 11:21
2
This does not w...
How To Check If A Key in **kwargs Exists?
... can see, if prefix is not contained in kwargs, then the default '' (empty string) is being stored in the local prefix variable. If it is given, then its value is being used.
This is generally a compact and readable recipe for writing wrappers for any kind of function: Always just pass-through argu...
Java: when to use static methods
...atic imports. Easier, shorter.
Adding methods: you really wanted the class String to have a removeSpecialChars() instance method, but it's not there (and it shouldn't, since your project's special characters may be different from the other project's), and you can't add it (since Java is somewhat san...
PostgreSQL “DESCRIBE TABLE”
...so on)
The SQL standard way, as shown here:
select column_name, data_type, character_maximum_length, column_default, is_nullable
from INFORMATION_SCHEMA.COLUMNS where table_name = '<name of table>';
It's supported by many db engines.
...