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What is copy-on-write?
I would like to know what copy-on-write is and what it is used for? The term 'copy-on-write array' is mentioned several times in the Sun JDK tutorials but I didn't understand what it meant.
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How do I break out of a loop in Scala?
...> sum+=i)
(warning--this depends on details of how the takeWhile test and the foreach are interleaved during evaluation, and probably shouldn't be used in practice!).
(1b) Use tail recursion instead of a for loop, taking advantage of how easy it is to write a new method in Scala:
var sum = 0
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How do I check out a remote Git branch?
...is case use
git checkout -b test <name of remote>/test
or the shorthand
git checkout -t <name of remote>/test
With >1 Remotes
Before you can start working locally on a remote branch, you need to fetch it as called out in answers below.
To fetch a branch, you simply need to:
git fetc...
When should I use genetic algorithms as opposed to neural networks? [closed]
...to determine when to use genetic algorithms as opposed to neural networks (and vice-versa) to solve a problem?
8 Answers
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Remove all the elements that occur in one list from another
Let's say I have two lists, l1 and l2 . I want to perform l1 - l2 , which returns all elements of l1 not in l2 .
7 ...
Android device chooser - My device seems offline
I have developed an application and i was planning to deploy it to my HTC Desire.
I have installed USB driver. I turned on USB debugging on the phone and choosed charge only when phone plugged-in. When I run application Android device chooser show my device offline.
I am stuck at this point. Any hel...
warning: Insecure world writable dir /usr/local/bin in PATH, mode 040777
Every time I run this command rails server :
12 Answers
12
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How to rethrow the same exception in SQL Server
...al clean code sample to rollback a series of statements if an error occurs and reports the error message.
begin try
begin transaction;
...
commit transaction;
end try
begin catch
if @@trancount > 0 rollback transaction;
throw;
end catch
Before SQL 2012
begin try
begin t...
Why are flag enums usually defined with hexadecimal values
...orld of base ten anymore. We're dealing with bits - the machine's world - and we're gonna play by its rules." Hexadecimal is rarely used unless you're dealing with relatively low-level topics where the memory layout of data matters. Using it hints at the fact that that's the situation we're in no...
Any difference between First Class Function and High Order Function
I'm wondering whether/what difference between First Class Function and High Order Function .
6 Answers
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