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What is the tilde (~) in the enum definition?
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~ is the unary one's complement operator -- it flips the bits of its operand.
~0 = 0xFFFFFFFF = -1
in two's complement arithmetic, ~x == -x-1
the ~ operator can be found in pretty much any language that borrowed syntax from C, including Objective-C/C++/C#/Java/Java...
Is it better to call ToList() or ToArray() in LINQ queries?
...often run into the case where I want to eval a query right where I declare it. This is usually because I need to iterate over it multiple times and it is expensive to compute. For example:
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Perforce for Git users? [closed]
There is a lot of "Git for Perforce users" documentation out there, but seemingly very little of the opposite.
3 Answers
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how can you easily check if access is denied for a file in .NET?
...e to check if I have rights to open the file before I actually try to open it; I do not want to use a try/catch for this check unless I have to. Is there a file access property I can check before hand?
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What is the fastest way to compute sin and cos together?
...ns simultaneously. If you need strong optimization, perhaps you should use it.
Here is a small example: http://home.broadpark.no/~alein/fsincos.html
Here is another example (for MSVC): http://www.codeguru.com/forum/showthread.php?t=328669
Here is yet another example (with gcc): http://www.allegro...
How should I cast in VB.NET?
...o give you the string representation of an object, regardless of what type it is. Use this if var is not a string already.
CStr(var) is the VB string cast operator. I'm not a VB guy, so I would suggest avoiding it, but it's not really going to hurt anything. I think it is basically the same as CT...
Difference between a Structure and a Union
...ruct and a union ?
Basically I know that struct uses all the memory of its member and union uses the largest members memory space. Is there any other OS level difference?
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How to use Swift @autoclosure
I noticed when writing an assert in Swift that the first value is typed as
6 Answers
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Convert object string to JSON
...SON.stringify(eval("(" + str + ")"));
Note that when you eval an object literal, it has to be wrapped in parentheses, otherwise the braces are parsed as a block instead of an object.
I also agree with the comments under the question that it would be much better to just encode the object in valid ...
'Static readonly' vs. 'const'
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public static readonly fields are a little unusual; public static properties (with only a get) would be more common (perhaps backed by a private static readonly field).
const values are burned directly into the call-site; this is double edged:
it is useless i...