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How do I drop a function if it already exists?
...imple, but how do I preface the creation of a function with a check to see if it already exists? If it exists, I want to drop and re-create it.
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Which exception should I raise on bad/illegal argument combinations in Python?
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I would just raise ValueError, unless you need a more specific exception..
def import_to_orm(name, save=False, recurse=False):
if recurse and not save:
raise ValueError("save must be True if recurse is True")
There's really no point in doing class BadValueError(ValueE...
Hashing a dictionary?
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If your dictionary is not nested, you could make a frozenset with the dict's items and use hash():
hash(frozenset(my_dict.items()))
This is much less computationally intensive than generating the JSON string or representat...
How can a Java variable be different from itself?
I am wondering if this question can be solved in Java (I'm new to the language). This is the code:
10 Answers
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Can I use conditional statements with EJS templates (in JMVC)?
and if yes, what is the syntax?
My goal is to prepend an 's' to the word 'comment' when there is more than one. in an jQuery.ejs template in a JMVC app. The following breaks. I can't find any docs for conditionals...
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What does !! mean in ruby?
... Why not just return .nil? instead of using !!? Is there a difference?
– ashes999
Sep 3 '14 at 13:52
3
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Optional Parameters with C++ Macros
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This is pretty cool, but I dont think it would work if I just did PRINT_STRING. In that case there wouldnt be a default print out (and that's actually the case I want to utilize). Still +1 for really cool.
– Cenoc
Jun 15 '10 at 19:53
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What is the explanation for these bizarre JavaScript behaviours mentioned in the 'Wat' talk for Code
...ject]". When following the steps from §9.3.1, we get NaN as a result:
If the grammar cannot interpret the String as an expansion of StringNumericLiteral, then the result of ToNumber is NaN.
Array(16).join("wat" - 1)
As per §15.4.1.1 and §15.4.2.2, Array(16) creates a new array with length 1...
Elegant ways to support equivalence (“equality”) in Python classes
...(1)
n1 == n2 # False -- oops
So, Python by default uses the object identifiers for comparison operations:
id(n1) # 140400634555856
id(n2) # 140400634555920
Overriding the __eq__ function seems to solve the problem:
def __eq__(self, other):
"""Overrides the default implementation"""
if...
Check if inputs are empty using jQuery
I have a form that I would like all fields to be filled in. If a field is clicked into and then not filled out, I would like to display a red background.
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