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Can I extend a class using more than 1 class in PHP?
...y and avoids the typical problems associated with multiple inheritance and Mixins.
They are recognized for their potential in supporting better composition and reuse, hence their integration in newer versions of languages such as Perl 6, Squeak, Scala, Slate and Fortress. Traits have also been port...
Python append() vs. + operator on lists, why do these give different results?
... due to the potential confusion which the Abel's answer above may cause by mixing the discussion of lists, sequences and arrays.
Arrays were added to Python after sequences and lists, as a more efficient way of storing arrays of integral data types. Do not confuse arrays with lists. They are not the...
Xcode 4 and Core Data: How to enable SQL Debugging
I'm working on a universal iOS app and I'd like to see the raw SQL in the logs when I'm debugging. There is some info in this blog post about how to enable raw SQL logging for iOS Core Data development. The given example is for Xcode 3 and it's just not clear to me how to enable this in Xcode 4.
...
Tools to search for strings inside files without indexing [closed]
... 1 minute to search a 20GB folder with 26k files, source code and binaries mixed up. 15k files are searched - the rest are likely skipped due to being binary files. Subsequent searches in the same folder are on the order of seconds (until stuff gets evicted form the cache).
The next closest I've f...
Testing modules in rspec
... module expects some behaviours to be present in the class into which it's mixed, then I'd try to implement dummies of those behaviours. Just enough to make the module happy to perform its duties.
That said, I'd be a little nervous about my design when a module expects a whole lot from its host (do...
EditorFor() and html properties
...
I think you are mixing up contexts. How can you have two different EditorFor calls with each one getting its own size and maxlength values with the link you provided? If you don't want to use EditorFor, you always can use TextBox helper or...
What is the difference between user and kernel modes in operating systems?
...cted
access to the underlying hardware. It
can execute any CPU instruction and
reference any memory address. Kernel
mode is generally reserved for the
lowest-level, most trusted functions
of the operating system. Crashes in
kernel mode are catastrophic; they
will halt the entire PC.
...
Do Java arrays have a maximum size?
...nt (build 1.8.0_141-b16)
OpenJDK 64-Bit Server VM (build 25.141-b16, mixed mode)
It only works for x >= 2 which means the maximum size of an array is Integer.MAX_VALUE-2
Values above that give
Exception in thread "main" java.lang.OutOfMemoryError: Requested array size exceeds VM limi...
String isNullOrEmpty in Java? [duplicate]
...
I was confused between the distinction between blank and empty, so I looked it up; blank means, "", null, and any amount of whitespace; empty is just "" and null.
– James McMahon
Feb 16 '10 at 15:50
...
'AND' vs '&&' as operator
... ("*") operator has a higher precedence than the addition ("+") operator.
Mixing them together in single operation, could give you unexpected results in some cases
I recommend always using &&, but that's your choice.
On the other hand "&" is a bitwise AND operation. It's used for the...