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Check if at least two out of three booleans are true
...ay, useless. Micro-optimizations, when driven by the need, is guided by runtime profiling results, not human instincts (which are known to be terrible). You can certainly ask interviewees the process by which you'd optimize this further; that's more important than the result itself.
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Getting an element from a Set
... looking for a way to avoid exactly that! An object that acts, at the same time, both as a key and corresponding value is exactly what a set should be all about. In my case, I'd like to get some complex object from a set by key (String). This String is encapsulated (and unique) to the object being ...
Can one do a for each loop in java in reverse order?
...called outside of the loop.
Also you don't want to perform a reverse every time you loop - would that be true if one of the Iterables.reverse ideas was applied?
Collections.reverse(stringList);
for(String string: stringList){
//...do something
}
...
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) ...
Any good, visual HTML5 Editor or IDE? [closed]
...pletion, it provides explicit support for node.js development, offers real-time collaboration, and you get bash into the deal with all its most popular tools (gcc included). All without having to open anything other than your browser.
I think that's Pretty Awesome.
EDIT Q3 2013 I would also sugges...
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...
How do you set your pythonpath in an already-created virtualenv?
...NPATH="/the/path/you/want"
This way, the new PYTHONPATH will be set each time you use this virtualenv.
EDIT: (to answer @RamRachum's comment)
To have it restored to its original value on deactivate, you could add
export OLD_PYTHONPATH="$PYTHONPATH"
before the previously mentioned line, and ad...
View a list of recent documents in Vim
...es, and tab completion, rather than dealing with a clunky giant list every time.
– Ben
Aug 15 '14 at 15:04
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Is not an enclosing class Java
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You can surely call new operator any number of times until you do not want to keep a reference of that object.
– Vishal Kumar
Sep 16 '15 at 10:22
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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 ...