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What is the most accurate way to retrieve a user's correct IP address in PHP?
...erable to header spoofing. How long is a session? Dynamic IPs don't change fast.
– MZB
Jan 12 '10 at 13:38
They do, es...
I just discovered why all ASP.Net websites are slow, and I am trying to work out what to do about it
...AngiesList.Redis.RedisSessionStateModule, which aside from using the (very fast) Redis server for storage (I'm using the windows port -- though there is also an MSOpenTech port), it does absolutely no locking on the session.
In my opinion, if your application is structured in a reasonable way, thi...
Setting Short Value Java
... the numbers involved. 2 tiny bytes java reservers for short cap up really fast
– DGoiko
Jan 26 at 17:11
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Difference between partition key, composite key and clustering key in Cassandra?
...n date is that results are already sorted (and stored, which makes lookups fast). But why do we use a compound key for partitioning key? Because we always want to read as few partitions as possible. How putting join_date in there helps? Now users from the same group and the same join date will resid...
scala vs java, performance and memory? [closed]
...ld add that per amount of time spent programming, my Scala code is usually faster than my Java code since in Scala I can get the tedious not-performance-critical parts done with less effort, and spend more of my attention optimizing the algorithms and code for the performance-critical parts.
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Which, if any, C++ compilers do tail-recursion optimization?
... ICC would do so, I believe. To the best of my knowledge, ICC produces the fastest code on the market.
– Paul Nathan
Oct 21 '08 at 4:04
35
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AI2 Media Notification
...⏸) is displayed. false: the play symbol (⯈) is displayed. SupportFastForward The Fast Forward icon (>>) is shown in the notification. Note: Changing this property will take effect with the next call to ShowNotification. SupportRewind The Rewind icon (
How to pull remote branch from somebody else's repo
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That was very fast :) You might want to add that he should use the git:// URL from the other person's GitHub repository page in the place of //path/to/coworkers/repo.git. (Describing that was what made my answer too slow ;))
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Why not use Double or Float to represent currency?
... can always round the result and thus avoid the whole issue. This is much faster and simpler than using BigDecimal. Another alternative is to use fixed precision int or long.
– Peter Lawrey
Feb 24 '13 at 12:12
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Finding three elements in an array whose sum is closest to a given number
...eally fancy, by representing each integer as a bit vector and performing a fast Fourier transform, but that's beyond the scope of this answer.
Note: Because this is an interview question, I've cheated a little bit here: this algorithm allows the selection of the same element multiple times. That ...