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Setting action for back button in navigation controller
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@TimAutin I just tested this again and seems like something has changed. Key part to understand that in a UINavigationController, the navigationBar.delegate is set to the navigation controller. So the methods SHOULD get called. However, in Sw...
How do I add the contents of an iterable to a set?
...nce competitive with doing aset.update(), here's an example of how you can test your beliefs quickly before going public:
>\python27\python -mtimeit -s"it=xrange(10000);a=set(xrange(100))" "a.update(it)"
1000 loops, best of 3: 294 usec per loop
>\python27\python -mtimeit -s"it=xrange(10000);...
What is the use case of noop [:] in bash?
...or if statements when I comment out all the code. For example you have a test:
if [ "$foo" != "1" ]
then
echo Success
fi
but you want to temporarily comment out everything contained within:
if [ "$foo" != "1" ]
then
#echo Success
fi
Which causes bash to give a syntax error:
line 4:...
Make sure only a single instance of a program is running
...code should do the job, it is cross-platform and runs on Python 2.4-3.2. I tested it on Windows, OS X and Linux.
from tendo import singleton
me = singleton.SingleInstance() # will sys.exit(-1) if other instance is running
The latest code version is available singleton.py. Please file bugs here.
...
Setting “checked” for a checkbox with jQuery
...('checked', false);
Note that this is the approach used by jQuery's unit tests prior to version 1.6 and is preferable to using $('.myCheckbox').removeAttr('checked'); since the latter will, if the box was initially checked, change the behaviour of a call to .reset() on any form that contains it ...
how to set a value for a span using JQuery
...
You can do:
$("#submittername").text("testing");
or
$("#submittername").html("testing <b>1 2 3</b>");
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How to sort by two fields in Java?
...es it a bit more clunky to define compared to LINQ.
Here is the full unit test for reference:
@Test
public void testChainedSorting()
{
// Create the collection of people:
ArrayList<Person> people = new ArrayList<>();
people.add(new Person("Dan", 4));
people.add(new Pers...
Error type 3 Error: Activity class {} does not exist
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May be helpful for someone:--
Sometimes when testing on a device, the app doesn't uninstall properly. To verify and fix this:
Go to Settings.
Go to Apps.
Select your app. (here, you can verify that your app is not uninstalled properly).
Open the overflow menu on the t...
delete vs delete[] operators in C++
...tor delete[] is distinguished but delete operator can release array too.
test* a = new test[100];
delete a;
And already checked this code have no memeory leak.
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What is the difference between `let` and `var` in swift?
...erence comes when using it with class instances (reference types):
class CTest
{
var str : String = ""
}
let letTest = CTest()
letTest.str = "test" // OK
letTest.str = "another test" // Still OK
//letTest = CTest() // Error
var varTest1 = CTest()
var varTest2 = CTest()
var varTest3 = CTest(...