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What are “connecting characters” in Java identifiers?
... WAVY LOW LINE
U+FF3F ＿ FULLWIDTH LOW LINE
This compiles on Java 7.
int _, ‿, ⁀, ⁔, ︳, ︴, ﹍, ﹎, ﹏, ＿;
An example. In this case tp is the name of a column and the value for a given row.
Column<Double> ︴tp︴ = table.getColumn("tp", double.class);
double tp = row.g...
How to check edittext's text is email address or not?
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With the introduction of new top level domains that are longer than 2-4 characters, this needs to be updated. Simply replace the {2.4}" with a "+". (e.g. joe@century21.realtor)
– Dave Owens
Ap...
Immutable vs Mutable types
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What? Floats are immutable? But can't I do
x = 5.0
x += 7.0
print x # 12.0
Doesn't that "mut" x?
Well you agree strings are immutable right? But you can do the same thing.
s = 'foo'
s += 'bar'
print s # foobar
The value of the variable changes, but it changes by changing what the ...
What does “where T : class, new()” mean?
...
That is a constraint on the generic parameter T. It must be a class (reference type) and must have a public parameter-less default constructor.
That means T can't be an int, float, double, DateTime or any other struct (value type).
It could...
Is the ternary operator faster than an “if” condition in Java [duplicate]
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Ternary Operator example:
int a = (i == 0) ? 10 : 5;
You can't do assignment with if/else like this:
// invalid:
int a = if (i == 0) 10; else 5;
This is a good reason to use the ternary operator. If you don't have an assignment:
(i == 0) ? foo ...
Difference between signed / unsigned char [duplicate]
So I know that the difference between a signed int and unsigned int is that a bit is used to signify if the number if positive or negative, but how does this apply to a char ? How can a character be positive or negative?
...
How to get Latitude and Longitude of the mobile device in android?
...ness.
LocationFinder
public class LocationFinder extends Activity {
int increment = 4;
MyLocation myLocation = new MyLocation();
// private ProgressDialog dialog;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView...
How do I get the size of a java.sql.ResultSet?
...
Do a SELECT COUNT(*) FROM ... query instead.
OR
int size =0;
if (rs != null)
{
rs.last(); // moves cursor to the last row
size = rs.getRow(); // get row id
}
In either of the case, you won't have to loop over the entire data.
...
Why can't stash be applied to the working directory?
...t I personally prefer to stay "within git".
The best way to do this is to convert the stash to a branch. Once it is a branch you can work normally in git using the normal branch-related techniques/tools you know and love. This is actually a useful general technique for working with stashes even whe...
Why can't variable names start with numbers?
...a string of digits would be a valid identifier as well as a valid number.
int 17 = 497;
int 42 = 6 * 9;
String 1111 = "Totally text";
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