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What is a callback?
What's a callback and how is it implemented in C#?
11 Answers
11
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What is an abstract class in PHP?
...act method, which is a method without any actual code in it, just the name and the parameters, and that has been marked as "abstract".
The purpose of this is to provide a kind of template to inherit from and to force the inheriting class to implement the abstract methods.
An abstract class thus is...
appending array to FormData and send via AJAX
I'm using ajax to submit a multipart form with array, text fields and files.
9 Answers
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Cosine Similarity between 2 Number Lists
...ity between two lists , let's say for example list 1 which is dataSetI and list 2 which is dataSetII . I cannot use anything such as numpy or a statistics module. I must use common modules (math, etc) (and the least modules as possible, at that, to reduce time spent).
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Convert to/from DateTime and Time in Ruby
How do you convert between a DateTime and a Time object in Ruby?
6 Answers
6
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vim line numbers - how to have them on by default?
...f the .vimrc file is not in your home directory create one with
vim .vimrc and add the commands you want at open.
Here's a site that explains the vimrc and how to use it.
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Tomcat startup logs - SEVERE: Error filterStart how to get a stack trace?
...that type of info. I wouldn't expect the full stacktrace to be dumped to standard out.
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Why do you need explicitly have the “self” argument in a Python method?
...quote Peters' Zen of Python. "Explicit is better than implicit."
In Java and C++, 'this.' can be deduced, except when you have variable names that make it impossible to deduce. So you sometimes need it and sometimes don't.
Python elects to make things like this explicit rather than based on a r...
How do I detect that an iOS app is running on a jailbroken phone?
...reak. In the simple case, you should be able to see if Cydia is installed and go by that - something like
NSString *filePath = @"/Applications/Cydia.app";
if ([[NSFileManager defaultManager] fileExistsAtPath:filePath])
{
// do something useful
}
For hacked kernels, it's a little (lot) more in...
Relative imports in Python 3
...
unfortunately, this module needs to be inside the package, and it also
needs to be runnable as a script, sometimes. Any idea how I could
achieve that?
It's quite common to have a layout like this...
main.py
mypackage/
__init__.py
mymodule.py
myothermodule.py
...w...