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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.
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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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Missing Push Notification Entitlement
...airly states that the "distribution profile MUST have the aps-environment, etc" in it, and that when I open the provisioning in a text editor, I should find it lying there...
– mirageservo
Feb 11 '13 at 7:11
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Will iOS launch my app into the background if it was force-quit by the user?
I am triggering a background fetch by using the content-available flag on a push notification. I have the fetch and remote-notification UIBackgroundModes enabled.
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Objective-C class -> string like: [NSArray className] -> @“NSArray”
... the class, including its name, the methods it implements, the superclass, etc. NSStringFromClass just pulls the name of the class from this struct and converts it to an NSString. Don't store the class name in a static NSString, it won't offer any performance advantage.
– dream...
“Java DateFormat is not threadsafe” what does this leads to?
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The specifications of Format, NumberFormat, DateFormat, MessageFormat, etc. were not designed to be thread-safe. Also, the parse method calls on Calendar.clone() method and it affects calendar footprints so many threads parsing concurrently will change the cloning of the Calendar instance.
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