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What does “Document-oriented” vs. Key-Value mean when talking about MongoDB vs Cassandra?
What does going with a document based NoSQL option buy you over a KV store, and vice-versa?
4 Answers
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How can I use pointers in Java?
...= new Tiger();
Tiger third;
Dereferencing a null:
first.growl(); // ERROR, first is null.
third.growl(); // ERROR, third has not been initialized.
Aliasing Problem:
third = new Tiger();
first = third;
Losing Cells:
second = third; // Possible ERROR. The old value of second is lost. ...
Why is “if not someobj:” better than “if someobj == None:” in Python?
...is not already one. Roughly, we are asking the object : are you meaningful or not ? This is done using the following algorithm :
If the object has a __nonzero__ special method (as do numeric built-ins, int and float), it calls this method. It must either return a bool value which is then directly ...
Architecture of a single-page JavaScript web application?
...b apps
I also found it helpful to abstract away the JS library, leaving door open to change mind on what you use, or mix & match should the need arise.
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Difference Between One-to-Many, Many-to-One and Many-to-Many?
...any relationships. I'm using Hibernate right now so any explanation that's ORM related will be helpful.
8 Answers
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What is the difference between Strategy design pattern and State design pattern?
...nds to vary depending on who you ask. Some popular choices are:
States store a reference to the context object that contains them. Strategies do not.
States are allowed to replace themselves (IE: to change the state of the context object to something else), while Strategies are not.
Strategies are...
Version number comparison in Python
...p -like function which compares two version numbers and returns -1 , 0 , or 1 based on their compared valuses.
17 Answe...
Is an anchor tag without the href attribute safe?
Is it okay to use an anchor tag without including the href attribute, and instead using a JavaScript click event handler? So I would omit the href completely, not even have it empty ( href="" ).
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Disable a Button
... a button ( UIButton ) on iOS after it is clicked. I am new to developing for iOS but I think the equivalent code on objective - C is this:
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What is the maximum length of data I can put in a BLOB column in MySQL?
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A BLOB can be 65535 bytes (64 KB) maximum.
If you need more consider using:
a MEDIUMBLOB for 16777215 bytes (16 MB)
a LONGBLOB for 4294967295 bytes (4 GB).
See Storage Requirements for String Types for more info.
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