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Which is better in python, del or delattr?
This may be silly, but it's been nagging the back of my brain for a while.
8 Answers
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How do you make div elements display inline?
...;2<br />3</div>
<br class="clearBoth" /><!-- you may or may not need this -->
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What does 'super' do in Python?
...ed to write a class that extended Child and a mixin, their code would not work properly.
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How to exit in Node.js
...ixelfreak, exit isn't misleading at all. You are confused about how Node works. Think of Node as the server itself. It isn't just fired up as needed, like PHP is within a web server like Apache. Node doesn't even have to have anything to do with web servers at all! It's just a host for some Jav...
Comparing Java enum members: == or equals()?
I know that Java enums are compiled to classes with private constructors and a bunch of public static members. When comparing two members of a given enum, I've always used .equals() , e.g.
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Why is there no String.Empty in Java?
...is two, and they would both be referencing exactly the same instance in memory at runtime. I'm not entirely sure why String.EMPTY would save on compile time, in fact I think it would be the latter.
Especially considering Strings are immutable, it's not like you can first get an empty String, and pe...
Checking if an Android application is running in the background
...plication by yourself using Activity.onPause, Activity.onResume methods. Store "visibility" status in some other class. Good choices are your own implementation of the Application or a Service (there are also a few variations of this solution if you'd like to check activity visibility from the servi...
What is the point of interfaces in PHP?
... point of interfaces is to give you the flexibility to have your class be forced to implement multiple interfaces, but still not allow multiple inheritance. The issues with inheriting from multiple classes are many and varied and the wikipedia page on it sums them up pretty well.
Interfaces are a ...
What does threadsafe mean?
...d safe"? about the definition of thread safety as found of Wikipedia.
3 important things extracted from the links :
“A piece of code is thread-safe if it functions correctly during
simultaneous execution by multiple threads.”
“In particular, it must satisfy the need for multiple threads to
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grep using a character vector with multiple patterns
I am trying to use grep to test whether a vector of strings are present in an another vector or not, and to output the values that are present (the matching patterns).
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