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Why don't Java Generics support primitive types?
...e way that they do ... at least in part ... because they were added to the language a number of years after the language was designed1. The language designers were constrained in their options for generics by having to come up with a design that was backwards compatible with the existing language a...
Using a strategy pattern and a command pattern
...mplement undo and redo functionality
Maintain a history of commands
java.lang.Thread is one good implementation of Command pattern. You can treat Thread as invoker & class implementing Runnable as ConcreteCommonad/Receiver and run() method as Command.
Undo/Redo version of command pattern can ...
Why does this code segfault on 64-bit architecture but work fine on 32-bit?
...n used different registers for returning pointers than integers)
The comp.lang.c FAQ has an entry discussing why casting the return from malloc is never needed and potentially bad.
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Is it unnecessary to put super() in constructor?
...ogramming...
when we not extends any specific class automatic extends java.lang.Object class
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Appending an element to the end of a list in Scala
...and efficient append. See the performance characteristics section in scala-lang.org/docu/files/collections-api/collections.html
– Arjan Blokzijl
Oct 17 '11 at 14:12
29
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Why is char[] preferred over String for passwords?
...seem logical to collect and store the password in an object
of type java.lang.String. However, here's the caveat: Objects of
type String are immutable, i.e., there are no methods defined that
allow you to change (overwrite) or zero out the contents of a String
after usage. This feature makes...
How to find out the number of CPUs using python
...yError, ValueError):
pass
# jython
try:
from java.lang import Runtime
runtime = Runtime.getRuntime()
res = runtime.availableProcessors()
if res > 0:
return res
except ImportError:
pass
# BSD
try:
sysctl = su...
Import PEM into Java Key Store
...
If I go like this I get an error: keytool error: java.lang.Exception: Input not an X.509 certificate
– frandevel
Jan 19 '12 at 8:42
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Why use Ruby instead of Smalltalk? [closed]
...t Python and Ruby have, so the concept of 'smalltalk as embedded scripting language' never caught on.As an aside, Java was not the easiest thing to interface with other code bases (JNI is fairly clumsy), but that did not stop it from gaining mindshare. IMO the interfacing argument is significant - ...
Fragment transaction animation: slide in and slide out
...
It doesn't work... caused "java.lang.RuntimeException: Unknown animator name: translate". This solution worked for me. trickyandroid.com/fragments-translate-animation
– Ataru
Feb 4 '15 at 11:45
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