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How do I check if a list is empty?
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if not a:
print("List is empty")
Using the implicit booleanness of the empty list is quite pythonic.
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Is JavaScript an untyped language?
... "dynamically, weakly typed" language, but some even say "untyped"? Which is it really?
7 Answers
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cleanest way to skip a foreach if array is empty [duplicate]
Not a major problem but I was wondering if there is a cleaner way to do this. It would be good to avoid nesting my code with an unnecessary if statement. If $items is empty php throws an error.
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Creating a singleton in Python
This question is not for the discussion of whether or not the singleton design pattern is desirable, is an anti-pattern, or for any religious wars, but to discuss how this pattern is best implemented in Python in such a way that is most pythonic. In this instance I define 'most pythonic' to mean tha...
What is a magic number, and why is it bad? [closed]
What is a magic number?
15 Answers
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Call a Server-side Method on a Resource in a RESTful Way
...eep in mind I have a rudimentary understanding of REST. Let's say I have this URL:
8 Answers
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onKeyPress Vs. onKeyUp and onKeyDown
What is the difference between these three events? Upon googling I found that:
12 Answers
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Is there a performance impact when calling ToList()?
When using ToList() , is there a performance impact that needs to be considered?
8 Answers
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How to check if PHP array is associative or sequential?
...purposes.)
The first question (simply checking that all keys are numeric) is answered well by Captain kurO.
For the second question (checking whether the array is zero-indexed and sequential), you can use the following function:
function isAssoc(array $arr)
{
if (array() === $arr) return fals...
Performance surprise with “as” and nullable types
I'm just revising chapter 4 of C# in Depth which deals with nullable types, and I'm adding a section about using the "as" operator, which allows you to write:
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