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How to check if a number is a power of 2
...eturn (x != 0) && ((x & (x - 1)) == 0);
}
Explanation
First and foremost the bitwise binary & operator from MSDN definition:
Binary & operators are predefined for the integral types and bool. For
integral types, & computes the logical bitwise AND of its operands.
F...
Multiple “order by” in LINQ
I have two tables, movies and categories , and I get an ordered list by categoryID first and then by Name .
7 Answers...
Check if an array contains any element of another array in JavaScript
...and booleans) can be used (correctly), because the values are (implicitly) converted to strings and set as the keys to the lookup map. This isn't exactly good/possible/easily done for non-literal values.
NSLog the method name with Objective-C in iPhone
... Method calls like [self doSomething:arg1 somethingElse:arg2] get converted into the C function call objc_msgSend(self, "doSomething:somethingElse:, arg1, arg2);. The second parameter of objc_msgSend() takes a char*. Remember that because the Objective-C runtime is dynamic, it's actually us...
How to insert an element after another element in JavaScript without using a library?
...acent
will lose properties of the element such as events because outerHTML converts the element to a string. We need it because insertAdjacentHTML adds content from strings rather than elements.
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Incrementing a date in JavaScript
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The easiest way is to convert to milliseconds and add 1000*60*60*24 milliseconds e.g.:
var tomorrow = new Date(today.getTime()+1000*60*60*24);
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How to add an email attachment from a byte array?
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You need to convert the byte[] to a MemoryStream using the appropriate MemoryStream constructor overload.
Attachment att = new Attachment(new MemoryStream(myBytes), name);
Note that the name parameter to Attachment's constructor speci...
Replace multiple strings with multiple other strings
...r (as a string) is the 2nd parameter, n, to the lambda function.
The +n-1 converts the string to the number then 1 is subtracted to index the pets array.
The %number is then replaced with the string at the array index.
The /g causes the lambda function to be called repeatedly with each number whi...
How do I programmatically “restart” an Android app?
Firstly, I know that one should not really kill/restart an application on Android. In my use case I want to factory-reset my application in a specific case where a server sends a specific information to the client.
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Different ways of loading a file as an InputStream
...to this object's class loader.", and then gives a bunch of rules on how it converts a relative path to an absolute path before delegating to the classloader.
– LordOfThePigs
Jun 18 '13 at 13:54
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