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MySQL vs MongoDB 1000 reads
I have been very excited about MongoDb and have been testing it lately. I had a table called posts in MySQL with about 20 million records indexed only on a field called 'id'.
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How to check the differences between local and github before the pull [duplicate]
... using pull, I want to check if there are any differences between my local and github master.
3 Answers
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Java serialization: readObject() vs. readResolve()
The book Effective Java and other sources provide a pretty good explanation on how and when to use the readObject() method when working with serializable Java classes. The readResolve() method, on the other hand, remains a bit of a mystery. Basically all documents I found either mention only one o...
In which scenario do I use a particular STL container?
...p on STL containers in my book on C++, specifically the section on the STL and its containers. Now I do understand each and every one of them have their own specific properties, and I'm close to memorizing all of them... But what I do not yet grasp is in which scenario each of them is used.
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How to exit from the application and show the home screen?
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Android's design does not favor exiting an application by choice, but rather manages it by the OS. You can bring up the Home application by its corresponding Intent:
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.add...
How do I implement basic “Long Polling”?
...n find lots of information on how Long Polling works (For example, this , and this ), but no simple examples of how to implement this in code.
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How will I know when to create an interface?
...s();
c.Process();
d.Process();
why not have them implement IProcessable, and then do
List<IProcessable> list;
foreach(IProcessable p in list)
p.Process();
this will scale much better when you add, say, 50 types of classes that all do the same thing.
Another concrete problem:
Have...
Confusion between numpy, scipy, matplotlib and pylab
Numpy, scipy, matplotlib, and pylab are common terms among they who use python for scientific computation.
3 Answers
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How to generate XML file dynamically using PHP?
...ocument in PHP you should instance a DOMDocument class, create child nodes and append these nodes in the correct branch of the document tree.
For reference you can read http://it.php.net/manual/en/book.dom.php
Now we will take a quick tour of the code below.
at line 2 we create an empty xml docu...
When to use IList and when to use List
I know that IList is the interface and List is the concrete type but I still don't know when to use each one. What I'm doing now is if I don't need the Sort or FindAll methods I use the interface. Am I right? Is there a better way to decide when to use the interface or the concrete type?
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