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What is polymorphism, what is it for, and how is it used?
...basically just fizzled out but the OO paradigm has turned out to be a good one. Learn it, understand it, love it - you'll be glad you did :-)
(a) I originally wrote that as a joke but it turned out to be correct and, therefore, not that funny. The monomer styrene happens to be made from carbon an...
Where is PATH_MAX defined in Linux?
...mits.h>
char current_path[PATH_MAX];
PATH_MAX has some flaws as mentioned in this blog (thanks paulsm4)
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Apache Commons equals/hashCode builder [closed]
...t equals()):
a) in both versions of equals() above, you might want to use one or both of these shortcuts also:
@Override
public boolean equals(final Object obj){
if(obj == this) return true; // test for reference equality
if(obj == null) return false; // test for null
// continue as a...
Can you use a trailing comma in a JSON object?
...'t the first entry
s.appendF("\"%d\"", i);
}
s.append("]");
That extra one line of code in your for loop is hardly expensive...
Another alternative I've used when output a structure to JSON from a dictionary of some form is to always append a comma after each entry (as you are doing above) and ...
Describe the architecture you use for Java web applications? [closed]
...
Ok I'll do a (shorter) one:
Frontend : Tapestry (3 for older projects, 5 for newer projects)
Business layer: Spring
DAO's : Ibatis
Database : Oracle
We use Sping transaction support, and start transactions upon entering the service layer, propa...
Get top 1 row of each group
... rn = 1
If you expect 2 entries per day, then this will arbitrarily pick one. To get both entries for a day, use DENSE_RANK instead
As for normalised or not, it depends if you want to:
maintain status in 2 places
preserve status history
...
As it stands, you preserve status history. If you wa...
Why are there two ways to unstage a file in Git?
...
So typically, one would use git rm --cached <filePath> to remove some file(s) from the repo after realizing it should have never been in the repo: so most likely running this command & then adding the relevant files to gitignore....
C++11 introduced a standardized memory model. What does it mean? And how is it going to affect C++ p
... answered Jun 12 '11 at 0:23
NemoNemo
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Why are floating point numbers inaccurate?
...g point numbers are represented a lot like scientific notation: with an exponent and a mantissa (also called the significand). A very simple number, say 9.2, is actually this fraction:
5179139571476070 * 2 -49
Where the exponent is -49 and the mantissa is 5179139571476070. The reason it is imp...
The model used to open the store is incompatible with the one used to create the store
...elect the main file, open file inspector (right-hand panel)
and under Versioned core data model select your new version of data model for current data model
THAT'S NOT ALL ) You should perform so called "light migration".
Go to your AppDelegate and find where the persistentStoreCoordinator is being ...