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How to find time complexity of an algorithm
...ely cut it, but permutations are on that order - it's prohibitively steep, more so than any polynomial or exponential. There are exactly 10! seconds in six weeks but the universe is less than 20! seconds old.
– John P
Feb 25 '18 at 2:59
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Travel/Hotel API's? [closed]
...y/booking requests with several response options, including JSON, which is more convenient and lightweight than the (unfortunately) more widespread XML.
As you immediately access their API, you can start developing and testing, but still need their approval to launch the site, basically to make su...
p vs puts in Ruby
...y a newline, i.e. it prints the value of inspect instead of to_s, which is more suitable for debugging (because you can e.g. tell the difference between 1, "1" and "2\b1", which you can't when printing without inspect).
shar...
Most efficient way to increment a Map value in Java
...od are significantly faster, in that only they give a performance boost of more than 10%. However, if threading is an issue, AtomicLong might be more attractive than the others (I'm not really sure). I also ran TestForNull with final variables, but the difference was negligible.
Note that I haven't...
Error java.lang.OutOfMemoryError: GC overhead limit exceeded
...r as follows: "It's just like an 'Out of Java Heap space' error. Give it more memory with -Xmx." ?
– Tim Cooper
Jun 19 '10 at 13:28
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Android: Storing username and password?
...the frequency of asking for user
credentials -- to make phishing attacks more conspicuous, and less
likely to be successful. Instead use an authorization token and
refresh it.
Where possible, username and password should not be stored on the
device. Instead, perform initial authenticati...
Should we use Nexus or Artifactory for a Maven Repo?
...n a disk and only use a DB for storing metadata, it is quite flexible (see more here).
What makes those applications very different is their approach towards integration with other build tools and technologies. Nexus and Sonatype are pretty much locked on Maven and m2eclipse. They ignore anything e...
Android: What is better - multiple activities or switching views manually?
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I would say that multiple Activities almost always makes more sense. I just don't think Android is designed for constantly switching its own views - you miss out on so much. You have to implement Back yourself, you don't get any inter-Activity transitions, you have to implement a...
Why are mutable structs “evil”?
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Bash history without line numbers
...mand was padding the line numbers with spaces and now the cut syntax makes more sense :) Thanks @Keith Thompson for your solution that will work for > 100k histories.
– cwd
Aug 18 '11 at 16:00
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