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What does glLoadIdentity() do in OpenGL?
...glBegin(GL_FACE), some points, glEnd()), it translates it to "world space" by multiplying it with the MODELVIEW, and then translates it from 3D to 2D by multiplying it with the PROJECT matrix, and that gives it the 2D points on screen, along with the depth (from the screen 'camera'), which it uses t...
How to create your own library for Android development to be used in every program you write?
...property. Now you can add this library to your Android Application project by adding it to list on the same property page.
More detailed instructions here in Working with Library Projects section
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Reference: Comparing PHP's print and echo
...there).
Syntax
In the C programming language and languages influenced by it such as PHP, there is a distinction between statements and expressions. Syntactically, echo expr, expr, ... expr is a statement while print expr is an expression since it evaluates to a value. Therefore, like other stat...
What is the purpose of a stack? Why do we need it?
... have to explicitly allocate all the temporary storage that would normally by convention just go on the stack. Worse, our opcodes themselves are all getting enormous because they all now have to take as an argument the address that they're going to write their result into, and the address of each op...
Position an element relative to its container
...is laid out in normal flow, then it is removed from normal flow and offset by whatever values you have specified (top, right, bottom, left). It's important to note that because it's removed from flow, other elements around it will not shift with it (use negative margins instead if you want this beha...
What __init__ and self do on Python?
...ut that the first argument need not necessarily be called self, it just is by convention.
– Henry Gomersall
Jun 24 '12 at 19:37
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Why avoid increment (“++”) and decrement (“--”) operators in JavaScript?
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My view is to always use ++ and -- by themselves on a single line, as in:
i++;
array[i] = foo;
instead of
array[++i] = foo;
Anything beyond that can be confusing to some programmers and is just not worth it in my view. For loops are an exception, as the...
How to select first parent DIV using jQuery?
...nce to use .parents('div').eq(0) -- using that purse CSS selector FOLLOWED by jQuery to filter to just the first element will give you a slight performance boost -- see the 'Additional Notes' section on the jQuery :eq doc
– Noah Whitmore
Feb 6 '14 at 7:45
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json.net has key method?
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@WilliamT.Mallard In C# 6, you can simplify that by using the null-conditional index operator: myJObject["level1property"]?["level2property"].
– svick
Jan 4 '17 at 19:45
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Getting error: Peer authentication failed for user “postgres”, when trying to get pgsql working with
...ion methods.
Peer authentication
The peer authentication method works by obtaining the client's
operating system user name from the kernel and using it as the allowed
database user name (with optional user name mapping). This method is
only supported on local connections.
Password authe...