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What is The Rule of Three?
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Introduction
C++ treats variables of user-defined types with value semantics.
This means that objects are implicitly copied in various contexts,
and we should understand what "copying an object" actually means.
Let us consider a simple example:
class per...
Regex lookahead for 'not followed by' in grep
I am attempting to grep for all instances of Ui\. not followed by Line or even just the letter L
5 Answers
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How to REALLY show logs of renamed files with git?
I'm relatively new to git. I used Subversion before.
5 Answers
5
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New lines inside paragraph in README.md
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Interpreting newlines as <br /> used to be a feature of Github-flavored markdown, but the most recent help document no longer lists this feature.
Fortunately, you can do it manually. The easiest way is to ensure that each line ends with two spaces...
How to pretty-print a numpy.array without scientific notation and with given precision?
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And suppress suppresses the use of scientific notation for small numbers:
y=np.array([1.5e-10,1.5,1500])
print(y)
# [ 1.500e-10 1.500e+00 1.500e+03]
np.set_printoptions(suppress=True)
print(y)
# [ 0. 1.5 1500. ]
See the docs for set_printoptions for other options.
To apply...
Why is a round-trip conversion via a string not safe for a double?
Recently I have had to serialize a double into text, and then get it back. The value seems to not be equivalent:
3 Answers
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Unsupported major.minor version 52.0 [duplicate]
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The issue is because of Java version mismatch. Referring to the Wikipedia Java Class Reference:
Java SE 14 = 58
Java SE 13 = 57
Java SE 12 = 56 (0x38 hex)
Java SE 11 = 55 (0x37 hex)
Java SE 10 = 54
Java SE 9 = 53
Java SE 8 = 52
Java SE 7...
Python date string to date object
How do I convert a string to a date object in python?
7 Answers
7
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How do I save and restore multiple variables in python?
I need to save about a dozen objects to a file and then restore them later.
I've tried to use a for loop with pickle and shelve but it didn't work right.
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Definition of a Balanced Tree
I am just wondering if someone might be able to clarify the definition of a balanced tree for me. I have that "a tree is balanced if each sub-tree is balanced and the height of the two sub-trees differ by at most one.
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