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What is the difference between “def” and “val” to define a function
...nd creates new function every time (new instance of Function1).
def even: Int => Boolean = _ % 2 == 0
even eq even
//Boolean = false
val even: Int => Boolean = _ % 2 == 0
even eq even
//Boolean = true
With def you can get new function on every call:
val test: () => Int = {
val r = ut...
Ruby on Rails: How do you add add zeros in front of a number if it's under 10?
I'm looking to convert single digit numbers to two-digit numbers like so:
4 Answers
4
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Draw in Canvas by finger, Android
...
Start By going through the Fingerpaint demo in the sdk sample.
Another Sample:
public class MainActivity extends Activity {
DrawingView dv ;
private Paint mPaint;
@Override
protected void onCreate(Bundle savedInstanceState) {
s...
Difference between int[] array and int array[]
...
They are semantically identical. The int array[] syntax was only added to help C programmers get used to java.
int[] array is much preferable, and less confusing.
share
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How can I make a WPF combo box have the width of its widest element in XAML?
...inForms AutoSizeMode=GrowOnly.
The way I did this was with a custom value converter:
public class GrowConverter : IValueConverter
{
public double Minimum
{
get;
set;
}
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{...
Limit Decimal Places in Android EditText
...plements InputFilter {
Pattern mPattern;
public DecimalDigitsInputFilter(int digitsBeforeZero,int digitsAfterZero) {
mPattern=Pattern.compile("[0-9]{0," + (digitsBeforeZero-1) + "}+((\\.[0-9]{0," + (digitsAfterZero-1) + "})?)||(\\.)?");
}
@Override
public CharSequence filter(CharSequence sour...
Check if two lists are equal [duplicate]
...nce equality because Equals method checks for reference equality.
var a = ints1.SequenceEqual(ints2);
Or if you don't care about elements order use Enumerable.All method:
var a = ints1.All(ints2.Contains);
The second version also requires another check for Count because it would return true ev...
Using JSON.NET as the default JSON serializer in ASP.NET MVC 3 - is it possible?
...l another form of SerializeObject below
var serializedObject = JsonConvert.SerializeObject(Data, Formatting.Indented);
response.Write(serializedObject);
}
EDIT 2: I removed the check for Data being null as per the suggestions below. That should make newer versions of JQuery hap...
How can mixed data types (int, float, char, etc) be stored in an array?
... elements a discriminated union, aka tagged union.
struct {
enum { is_int, is_float, is_char } type;
union {
int ival;
float fval;
char cval;
} val;
} my_array[10];
The type member is used to hold the choice of which member of the union is should be used for ea...
MySQL combine two columns into one column
...f the values to numbers. If a value does not start with a digit, then the converted value is 0.
So try this:
select concat(column1, column2)
Two ways to add a space:
select concat(column1, ' ', column2)
select concat_ws(' ', column1, column2)
...