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Any difference between First Class Function and High Order Function
... = []
map f (x:xs) = f x : map f xs
That is, it takes a function, and an array, and returns a new array with the function applied to each element.
Functional languages -- languages where functions are the primary means of building programs -- all have first class functions. Most also have higher ...
What does iota of std::iota stand for?
...he use of the letter “i” as a typical integer variable, especially for array subscripting.
But let's suppose there is a deeper meaning.
According to the Oxford English Dictionary, “iota” is “The name of the Greek letter Ι, ι, corresponding to the Roman I, i; the smallest letter of the ...
How do I provide custom cast support for my class?
.....
MyClass bar = (MyClass)foo;
// explicitly convert bar into a new byte[] array...
byte[] baz = (byte[])bar;
Using implicit means that users of your class don't need to perform an explicit conversion, it all happens transparently:
byte[] foo = new byte[] { 1, 2, 3, 4, 5 };
// imlpicitly convert ...
How to use ArrayAdapter
... but don't know how to show both reason and long_val in the ListView using ArrayAdapter.
5 Answers
...
Using AES encryption in C#
... myRijndael.GenerateIV();
// Encrypt the string to an array of bytes.
byte[] encrypted = EncryptStringToBytes(original, myRijndael.Key, myRijndael.IV);
// Decrypt the bytes to a string.
string roundtrip = DecryptStri...
How do I expire a PHP session after 30 minutes?
...
@Metropolis: session_unset does the same as $_SESSION = array().
– Gumbo
Aug 9 '10 at 19:06
14
...
Predicate in Java
...rocess only the even numbers like this:
List<Integer> numbers = Arrays.asList(1,2,3,4,5,6,7,8,9,10);
for (int number : numbers) {
if (isEven(number)) {
process(number);
}
}
With Predicate, the if test is abstracted out as a type. This allows it to int...
Android : Check whether the phone is dual SIM
...eratively tests for methods to recover this information so that it uses an array of method names instead of a sequence of try/catch. For instance, to determine if we have two active SIMs we could do:
private static String[] simStatusMethodNames = {"getSimStateGemini", "getSimState"};
public stati...
Custom attributes in styles.xml
... the obtainStyledAttributes call in the custom view to reflect this:
TypedArray ta = context.getTheme().obtainStyledAttributes(attrs, R.styleable.TextViewFont2, 0, 0);
The code still ran. So I don't think it is some kind of introspection by the declare-styleable of the class it is named after.
T...
Getting RAW Soap Data from a Web Reference Client running in ASP.net
...eam);
string str = tr.ReadToEnd();
char[] data = str.ToCharArray();
Array.Reverse(data);
string strReversed = new string(data);
TextWriter tw = new StreamWriter(stream);
stream.Position = 0;
tw.Write(strReversed);
tw.Flush();
}
...