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Difference between Inheritance and Composition
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They are absolutely different. Inheritance is an "is-a" relationship. Composition is a "has-a".
You do composition by having an instance of another class C as a field of your class, instead of extending C. A good example where composition would've been a lot better t...
Is there a HTML opposite to ?
Is there a tag in HTML that will only display its content if JavaScript is enabled? I know <noscript> works the opposite way around, displaying its HTML content when JavaScript is turned off. But I would like to only display a form on a site if JavaScript is available, telling them why they ...
What's the difference between backtracking and depth first search?
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Backtracking is a more general purpose algorithm.
Depth-First search is a specific form of backtracking related to searching tree structures. From Wikipedia:
One starts at the root (selecting some node as the root in the graph case)...
How to 'git pull' into a branch that is not the current one?
...nnot run git checkout to change the selected branch until after the pull is complete. Is there a way to do this?
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Difference between HBase and Hadoop/HDFS
This is kind of naive question but I am new to NoSQL paradigm and don't know much about it. So if somebody can help me clearly understand difference between the HBase and Hadoop or if give some pointers which might help me understand the difference.
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What is the best way to tell if a character is a letter or number in Java without using regexes?
What is the best and/or easiest way to recognize if a string.charAt(index) is an A-z letter or a number in Java without using regular expressions? Thanks.
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Use of def, val, and var in scala
...12 , even though person.age=20 was successfully executed. I found that this happens because I used def in def person = new Person("Kumar",12) . If I use var or val the output is 20 . I understand the default is val in scala. This:
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Why is NaN not equal to NaN? [duplicate]
...number) and prescribes that NaN should compare as not equal to itself. Why is that?
6 Answers
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How are 3D games so efficient? [closed]
There is something I have never understood. How can a great big PC game like GTA IV use 50% of my CPU and run at 60fps while a DX demo of a rotating Teapot @ 60fps uses a whopping 30% ?
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INSERT INTO vs SELECT INTO
What is the difference between using
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