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What is the difference between cout, cerr, clog of iostream header in c++? When to use which one?
...order of their generation when both are directed to the same terminal/file/etc..
This contrasts with clog - if you write there it won't be buffered and isn't tied to anything, so it will buffer decent sized amounts of logging before flushing. This yields the highest throughput of messages, but mea...
SQL WHERE.. IN clause multiple columns
...e time without issue. Unless you are using an older optimizer (6.5, 7, 8, etc) it shouldn't have a problem with this syntax.
– mrdenny
Jul 16 '09 at 8:09
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Easiest way to detect Internet connection on iOS?
...ample on how to determine host reachability, reachability by WiFi, by WWAN etc. For a very simply check of network reachability, you can do something like this
Reachability *networkReachability = [Reachability reachabilityForInternetConnection];
NetworkStatus networkStatus = [networkReachabilit...
ASP.NET Temporary files cleanup
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Just an update on more current OS's (Vista, Win7, etc.) - the temp file path has changed may be different based on several variables. The items below are not definitive, however, they are a few I have encountered:
"temp" environment variable setting - then it would be:
%t...
Developing for Android in Eclipse: R.java not regenerating
...t allowed. Or when you have references that don't point to existing files, etc.
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Struct inheritance in C++
...t is not like a C struct.
In C++, a struct can have methods, inheritance, etc. just like a C++ class.
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Hashset vs Treeset
...o deal with the ordered set like first(), last(), headSet(), and tailSet() etc
Important points:
Both guarantee duplicate-free collection of elements
It is generally faster to add elements to the HashSet and then convert the collection to a TreeSet for a duplicate-free sorted traversal.
None of ...
How to check if a variable is set in Bash?
...ken from. One construct I use in almost any script I write is : ${FOOBAR:=/etc/foobar.conf} to set a default value for a variable if it is unset or null.
– Jens
Mar 10 '15 at 11:08
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C# nullable string error
...> and the ? suffix are for value types such as Int32, Double, DateTime, etc.
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XmlSerializer giving FileNotFoundException at constructor
... according to the environment (console application vs being hosted in IIS, etc). I guess what should have been implemented was a TryLoadAssembly() or something similar.
– Allon Guralnek
Jul 29 '15 at 4:40
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