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Getting the array length of a 2D array in Java
...
Consider
public static void main(String[] args) {
int[][] foo = new int[][] {
new int[] { 1, 2, 3 },
new int[] { 1, 2, 3, 4},
};
System.out.println(foo.length); //2
System.out.println(foo[0].length); //3
System.out.println(foo[1].length); //4...
How do I make a textbox that only accepts numbers?
...have a windows forms app with a textbox control that I want to only accept integer values. In the past I've done this kind of validation by overloading the KeyPress event and just removing characters which didn't fit the specification. I've looked at the MaskedTextBox control but I'd like a more gen...
Why in C++ do we use DWORD rather than unsigned int? [duplicate]
...me, do as the Romans do.") For you, that happens to correspond to unsigned int, but that might not always be the case. To be safe, use DWORD when a DWORD is expected, regardless of what it may actually be.
For example, if they ever changed the range or format of unsigned int they could use a differ...
Sort an array in Java
I'm trying to make a program that consists of an array of 10 integers which all has a random value, so far so good.
17 Answ...
Positive Number to Negative Number in JavaScript?
...the ~ bitwise operator.
For example, if you have a = 1000 and you need to convert it to a negative, you could do the following:
a = ~a + 1;
Which would result in a being -1000.
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Calculate date from week number
...or Week 53 of 2009 as well.
public static DateTime FirstDateOfWeekISO8601(int year, int weekOfYear)
{
DateTime jan1 = new DateTime(year, 1, 1);
int daysOffset = DayOfWeek.Thursday - jan1.DayOfWeek;
// Use first Thursday in January to get first week of the year as
// it will never b...
What does 'const static' mean in C and C++?
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A lot of people gave the basic answer but nobody pointed out that in C++ const defaults to static at namespace level (and some gave wrong information). See the C++98 standard section 3.5.3.
First some background:
Translation unit: A source file after the pre-processor (recu...
How can I change the EditText text without triggering the Text Watcher?
...
Your hint is enough for me. Actually I was registering the listener in onResume but not de-registering in onPause(), so it was calling multiple times.
– Smeet
Jun 7 '17 at 12:04
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Get output parameter value in ADO.NET
...nd type)
SqlParameter outputIdParam = new SqlParameter("@ID", SqlDbType.Int)
{
Direction = ParameterDirection.Output
};
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.Add(outputIdParam);
conn.Open();
cmd.ExecuteNonQuery();
// Some various ways to gra...
Passing an array by reference
...ant a reference to an array, rather than the (invalid) array of references int & array[100];.
EDIT: Some clarification.
void foo(int * x);
void foo(int x[100]);
void foo(int x[]);
These three are different ways of declaring the same function. They're all treated as taking an int * parameter...