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What is sys.maxint in Python 3?
... sys.maxsize can be used as an
integer larger than any practical list or string index. It conforms to
the implementation’s “natural” integer size and is typically the same
as sys.maxint in previous releases on the same platform (assuming the
same build options).
http://docs.python.or...
json_decode to array
I am trying to decode a JSON string into an array but i get the following error.
12 Answers
...
Newline in JLabel
...
Surround the string with <html></html> and break the lines with <br/>.
JLabel l = new JLabel("<html>Hello World!<br/>blahblahblah</html>", SwingConstants.CENTER);
...
Give examples of functions which demonstrate covariance and contravariance in the cases of both over
...ce:
class Super {
Object getSomething(){}
}
class Sub extends Super {
String getSomething() {}
}
Sub#getSomething is covariant because it returns a subclass of the return type of Super#getSomething (but fullfills the contract of Super.getSomething())
Contravariance
class Super{
void doSom...
Assigning variables with dynamic names in Java
...lt;Integer>();
for (int i = 1; i < 4; i++) {
n.add(5);
}
Map<String, Integer> n = new HashMap<String, Integer>();
for (int i = 1; i < 4; i++) {
n.put("n" + i, 5);
}
It is possible to use reflection to dynamically refer to variables that have been declared in the sou...
Iterate through a HashMap [duplicate]
...
The for (Map.Entry<String, Object> cursor : map.entrySet()) {...} syntax is much better.
– Chad Okere
Jan 28 '12 at 17:29
...
Hidden Features of Java
...le to have an "OR" there instead of the &?
– mainstringargs
Jun 16 '09 at 18:37
9
@Grasper: N...
Assert equals between 2 Lists in Junit
...it's easy to just do this:
@Test
public void test_array_pass()
{
List<String> actual = Arrays.asList("fee", "fi", "foe");
List<String> expected = Arrays.asList("fee", "fi", "foe");
assertThat(actual, is(expected));
assertThat(actual, is(not(expected)));
}
If you have a recent v...
awk without printing newline
...
Minor note: never use printf $0, since $0 may contain strings like %F, etc... Following easily fails (at least with GAWK 3.1.5): echo "%F"|awk '{printf $0}'. Use the printf "%s",$0 instead.
– Vlad
Dec 21 '16 at 5:51
...
How to convert a unix timestamp (seconds since epoch) to Ruby DateTime?
...strptime can handle seconds since epoch. The number must be converted to a string:
require 'date'
DateTime.strptime("1318996912",'%s')
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