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What is the most ridiculous pessimization you've seen? [closed]
...ld really say "Gee, we really didn't think of that up front and don't have time to deal with it now".
I've seen many more "ridiculous" examples of dumb performance problems than examples of problems introduced due to "pessimization"
Reading the same registry key thousands (or 10's of thousands) ...
Does Swift have access modifiers?
...) {
print(myMessage)
// In Swift 3, you will get a compile time error:
// error: 'myMessage' is inaccessible due to 'private' protection level
// In Swift 4 it should works fine!
}
}
So, there is no need to declare myMessage as fileprivate to be accessible in t...
Most underused data visualization [closed]
...I really like visualizations that can handle multivariate data, especially time series data. Heat maps can be useful for this. One really neat one was featured by David Smith on the Revolutions blog. Here is the ggplot code courtesy of Hadley:
stock <- "MSFT"
start.date <- "2006-01-12"
end...
Return multiple values in JavaScript?
...ax, but you can compile ES6 code down to IE-compatible JavaScript at build time with tools like Babel.
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Programmatically add custom event in the iPhone Calendar
...NSDate date]; //today
event.endDate = [event.startDate dateByAddingTimeInterval:60*60]; //set 1 hour meeting
event.calendar = [store defaultCalendarForNewEvents];
NSError *err = nil;
[store saveEvent:event span:EKSpanThisEvent commit:YES error:&err];
self...
Test a weekly cron job [closed]
...ctive contexts launched by other programs?" In cron, the trigger is some time condition, but lots of other *nix facilities launch scripts or script fragments in non-interactive ways, and often the conditions in which those scripts run contain something unexpected and cause breakage until the bugs ...
Does a finally block always get executed in Java?
...l be called after the execution of the try or catch code blocks.
The only times finally won't be called are:
If you invoke System.exit()
If you invoke Runtime.getRuntime().halt(exitStatus)
If the JVM crashes first
If the JVM reaches an infinite loop (or some other non-interruptable, non-terminati...
How do I check if string contains substring? [duplicate]
...esenting the position where the specified searchvalue occurs for the first time, or -1 if it never occurs. For my needs: if (str.toLowerCase().indexOf("yes") == -1)
– nwolybug
Sep 14 '15 at 16:23
...
Limit a stream by a predicate
... the predicate doesn't throw or have a side-effect if executed a few extra times). The problem is doing it in the context of recursive decomposition (fork/join framework) that Streams use. Really, it's Streams that are horribly inefficient.
– Aleksandr Dubinsky
...
Is Big O(logn) log base e?
...mple, because it better communicates the derivation of the algorithm's run-time.
In big-O() notation, constant factors are removed. Converting from one logarithm base to another involves multiplying by a constant factor.
So O(log N) is equivalent to O(log2 N) due to a constant factor.
However, i...