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Delete files or folder recursively on Windows CMD
How do I delete files or folders recursively on Windows from the command line?
12 Answers
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How to make an element in XML schema optional?
...iption" type="xs:string" minOccurs="0" maxOccurs="1" />
if you want 0 or 1 "description" elements, Or
<xs:element name="description" type="xs:string" minOccurs="0" maxOccurs="unbounded" />
if you want 0 to infinity number of "description" elements.
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How does type Dynamic work and how to use it?
...o do dynamic typing in Scala. But I can't imagine how that might look like or how it works.
1 Answer
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AttributeError(“'str' object has no attribute 'read'”)
In Python I'm getting an error:
5 Answers
5
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Is there a short contains function for lists?
... this syntax:
if myItem in list:
# do something
Also, inverse operator:
if myItem not in list:
# do something
It's work fine for lists, tuples, sets and dicts (check keys).
Note that this is an O(n) operation in lists and tuples, but an O(1) operation in sets and dicts.
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Sorting 1 million 8-decimal-digit numbers with 1 MB of RAM
I have a computer with 1 MB of RAM and no other local storage. I must use it to accept 1 million 8-digit decimal numbers over a TCP connection, sort them, and then send the sorted list out over another TCP connection.
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What is the purpose of “!” and “?” at the end of method names?
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It's "just sugarcoating" for readability, but they do have common meanings:
Methods ending in ! perform some permanent or potentially dangerous change; for example:
Enumerable#sort returns a sorted version of the object while Enumerable#sort! sorts...
Git branch strategy for small dev team [closed]
...aster branch and we check changes that we 'feel good about' into it. This works, but only until we check in a breaking change.
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Append values to a set in Python
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keep.update(yoursequenceofvalues)
e.g, keep.update(xrange(11)) for your specific example. Or, if you have to produce the values in a loop for some other reason,
for ...whatever...:
onemorevalue = ...whatever...
keep.add(onemorevalue)
But, of course, doing it in bulk with a single ...
When should you use constexpr capability in C++11?
It seems to me that having a "function that always returns 5" is breaking or diluting the meaning of "calling a function". There must be a reason, or a need for this capability or it wouldn't be in C++11. Why is it there?
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