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Instance variable: self vs @
... method is implemented in a given subclass. For example, you might have a MiddleAgedSocialite class that always reports its age 10 years younger than it actually is. Or more practically, a PersistentPerson class might lazily read that data from a persistent store, cache all its persistent data in a ...
How to pass argument to Makefile from command line?
...MAKECMDGOALS) | sed 's!^.* $@ !!') to omit all targets before and just consider the following as arguments: make target1 target2 action value1 value2
– Evgeniy Generalov
May 14 '14 at 13:51
...
What is the meaning of the prefix N in T-SQL statements and when should I use it?
... var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
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How to cache data in a MVC application
...eKey, Func<T> getItemCallback) where T : class;
}
Usage:
cacheProvider.GetOrSet("cache key", (delegate method if cache is empty));
Cache provider will check if there's anything by the name of "cache id" in the cache, and if there's not, it will call a delegate method to fetch data and sto...
background:none vs background:transparent what is the difference?
...-color: transparent; background-image: none;. A user stylesheet might override one or both of those values, but it will do so exactly as if background-color: transparent; background-image: none; had been written explicitly.
– Quentin
Mar 12 '15 at 12:34
...
Can mustache iterate a top-level array?
...
this one is right, and very usefully for multidimensional rendering. Please find my example as below
– Bhupender Keswani
Nov 8 '17 at 8:40
add a ...
How do different retention policies affect my annotations?
...as
completed, so they aren't written to
the bytecode.
Example: @Override, @SuppressWarnings
RetentionPolicy.CLASS: Discard during
class load. Useful when doing
bytecode-level post-processing.
Somewhat surprisingly, this is the
default.
RetentionPolicy.RUNTIME: Do not
discard. Th...
Faye vs. Socket.IO (and Juggernaut)
...Disclosure: I am the author of Faye.
Regarding Faye, everything you've said is true.
Faye implements most of Bayeux, the only thing missing right now is service channels, which I've yet to be convinced of the usefulness of. In particular Faye is designed to be compatible with the CometD reference ...
Oracle: If Table Exists
...nd most efficient way is to catch the "table not found" exception: this avoids the overhead of checking if the table exists twice; and doesn't suffer from the problem that if the DROP fails for some other reason (that might be important) the exception is still raised to the caller:
BEGIN
EXECUTE...
How to extract epoch from LocalDate and LocalDateTime?
...ods to convert them into date/time objects with timezones by passing a ZoneId instance.
LocalDate
LocalDate date = ...;
ZoneId zoneId = ZoneId.systemDefault(); // or: ZoneId.of("Europe/Oslo");
long epoch = date.atStartOfDay(zoneId).toEpochSecond();
LocalDateTime
LocalDateTime time = ...;
ZoneId...