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How do I show/hide a UIBarButtonItem?
...s = [self.toolbarItems mutableCopy];
// This is how you remove the button from the toolbar and animate it
[toolbarButtons removeObject:self.myButton];
[self setToolbarItems:toolbarButtons animated:YES];
// This is how you add the button to the toolbar and animate it
if (![toolbarButtons containsOb...
Create an empty data.frame
...is just a bit safer in the sense that you'll have the correct column types from the beginning, hence if your code relies on some column type checking, it will work even with a data.frame with zero rows.
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Update a dataframe in pandas while iterating row by row
...in my pseudo code I do the modification on the dataframe, not on the value from the iterator. The iterator value is only used for the index of the value/object. What will fail is row['ifor']=some_thing, for the reasons mentioned in the documentation.
– rakke
Ma...
What's the best method in ASP.NET to obtain the current domain?
...on.
As such, you should use IsDefaultPort as in the Accepted Answer above from Carlos Muñoz.
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Long list of if statements in Java
...n you could execute a command by index
commands[7].exec();
Plagiarising from DFA's, but having an abstract base class instead of an interface. Notice the cmdKey which would be used later. By experience, I realise that frequently an equipment commmand has subcommands too.
abstract public class Co...
Changing one character in a string
...probably:
text = "Z" + text[1:]
The text[1:] returns the string in text from position 1 to the end, positions count from 0 so '1' is the second character.
edit:
You can use the same string slicing technique for any part of the string
text = text[:1] + "Z" + text[2:]
Or if the letter only appe...
Should I use a data.frame or a matrix?
...haring @Gavin Simpson! Could you introduce a bit more about how to go back from 1-6 to a-f?
– YJZ
Jul 20 '15 at 14:40
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How do I implement a callback in PHP?
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It would be helpful to readers coming from Python programming to point out in the answer that 'someGlobalFunction' indeed is a defined function.
– TMOTTM
Apr 2 '13 at 13:45
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Rebase array keys after unsetting elements
... HTML form. If you are relying on unique key values to identify the output from a form, one of the methods below works better.
– user1239087
Feb 20 '17 at 0:09
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Should arrays be used in C++?
...ated to the above, the compiler can calculate the actual
size of the array from the initializers. You don't have to count them.
If you have access to C++11, std::array solves the first two issues,
and should definitely be used in preference to C style arrays in the
first case. It doesn't address...