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List vs tuple, when to use each? [duplicate]
In Python, when should you use lists and when tuples?
7 Answers
7
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Why can't I use switch statement on a String?
Is this functionality going to be put into a later Java version?
16 Answers
16
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Make a negative number positive
...ave a Java method in which I'm summing a set of numbers. However, I want any negatives numbers to be treated as positives. So (1)+(2)+(1)+(-1) should equal 5.
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Python element-wise tuple operations like sum
Is there anyway to get tuple operations in Python to work like this:
12 Answers
12
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How do you split a list into evenly sized chunks?
I have a list of arbitrary length, and I need to split it up into equal size chunks and operate on it. There are some obvious ways to do this, like keeping a counter and two lists, and when the second list fills up, add it to the first list and empty the second list for the next round of data, but t...
What is JSON and why would I use it?
... official documentation, but I still haven't got to the point where I really understand what JSON is, and why I'd use it.
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Python list sort in descending order
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In one line, using a lambda:
timestamp.sort(key=lambda x: time.strptime(x, '%Y-%m-%d %H:%M:%S')[0:6], reverse=True)
Passing a function to list.sort:
def foo(x):
return time.strptime(x, '%Y-%m-%d %H:%M:%S')[0:6]
timestamp.sort(key=foo, reverse=True)
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How to use a custom comparison function in Python 3?
In Python 2.x , I could pass custom function to sorted and .sort functions
6 Answers
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What algorithms compute directions from point A to point B on a map?
How do map providers (such as Google or Yahoo! Maps) suggest directions?
18 Answers
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Ruby: extend self
In Ruby, I understand the basic idea of extend . However, what's happening in this segment of code? Specifically, what does extend do? Is it just a convenient way of making the instance methods into class methods? Why would you do it this way rather than specifying class methods from the beginnin...