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What are the different usecases of PNG vs. GIF vs. JPEG vs. SVG?
...types of compression: Lossless and Lossy.
Lossless means that the image is made smaller, but at no detriment to the quality.
Lossy means the image is made (even) smaller, but at a detriment to the quality. If you saved an image in a Lossy format over and over, the image quality would get progres...
LEN function not including trailing spaces in SQL Server
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This is clearly documented by Microsoft in MSDN at http://msdn.microsoft.com/en-us/library/ms190329(SQL.90).aspx, which states LEN "returns the number of characters of the specified string expression, excluding trailing blanks"...
Python exit commands - why so many and when should each be used?
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Let me give some information on them:
quit() simply raises the SystemExit exception.
Furthermore, if you print it, it will give a message:
>>> print (quit)
Use quit() or Ctrl-Z plus Return to exit
>>>
This functionality was included to help people who do ...
What is java interface equivalent in Ruby?
...you have to be careful not to conflate the concept of the Interface, which is an abstract specification of the responsibilities, guarantees and protocols of a unit with the concept of the interface which is a keyword in the Java, C# and VB.NET programming languages. In Ruby, we use the former all th...
Type List vs type ArrayList in Java [duplicate]
I understand that with (1), implementations of the List interface can be swapped. It seems that (1) is typically used in an application regardless of need (myself I always use this).
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What's the point of OOP?
...rstand principles such as LSP); there seems to be little uniformity or consistency to the approaches that people take to modelling problem domains. All too often, the class is used simply for its syntactic sugar; it puts the functions for a record type into their own little namespace.
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What is the size of column of int(11) in mysql in bytes?
What is the size of column of int(11) in mysql in bytes?
11 Answers
11
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Is it possible only to declare a variable without assigning any value in Python?
Is it possible to declare a variable in Python, like so?:
14 Answers
14
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Const before or const after?
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why is there two correct ways of specifying const data and in what situation would you prefer or need one over the other if any?
Essentially, the reason that the position of const within specifiers prior to an asterisk does not...
What is a “callback” in C and how are they implemented?
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There is no "callback" in C - not more than any other generic programming concept.
They're implemented using function pointers. Here's an example:
void populate_array(int *array, size_t arraySize, int (*getNextValue)(void))
{
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