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C++ convert vector to vector
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Use std::vector's range constructor:
std::vector<int> intVec;
std::vector<double> doubleVec(intVec.begin(), intVec.end());
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Writing to an Excel spreadsheet
...et1')
stimulusTimes = [1, 2, 3]
reactionTimes = [2.3, 5.1, 7.0]
for i in range(len(stimulusTimes)):
sheet['A' + str(i + 6)].value = stimulusTimes[i]
sheet['B' + str(i + 6)].value = reactionTimes[i]
wb.save('example.xlsx')
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Better techniques for trimming leading zeros in SQL Server?
...unately, only works for numeric data, and sometimes the strings exceed the range for integer as well, so you'd have to use bigint.
– Cade Roux
Mar 19 '09 at 14:40
3
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Is there a decorator to simply cache function return values?
...turn n
return fib(n-1) + fib(n-2)
>>> print([fib(n) for n in range(16)])
[0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610]
>>> print(fib.cache_info())
CacheInfo(hits=28, misses=16, maxsize=None, currsize=16)
If you are stuck with Python 2.x, here's a list of o...
Java Timestamp - How can I create a Timestamp with the date 23/09/2007?
...G and won't compile! Compile error: 09 is an octal number, but 9 is out of range for octals. Logic error: the month is 0-based, you will get OCTOBER 23th of 2007
– user85421
Jun 10 '09 at 13:31
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How to determine whether a Pandas Column contains a particular value
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I did a few simple tests:
In [10]: x = pd.Series(range(1000000))
In [13]: timeit 999999 in x.values
567 µs ± 25.6 µs per loop (mean ± std. dev. of 7 runs, 1000 loops each)
In [15]: timeit x.isin([999999]).any()
9.54 ms ± 291 µs per loop (mean ± std. dev. of 7 runs,...
Comparing two NumPy arrays for equality, element-wise
... yoavram's comment)
It should be noted that:
this solution can have a strange behavior in a particular case: if either A or B is empty and the other one contains a single element, then it return True. For some reason, the comparison A==B returns an empty array, for which the all operator returns...
Git diff against a stash
...or those who were like me and have never seen the ^! before: commit^! is a range specifier which means: this commit, but none of its parents.
– Jonathan Gawrych
Feb 3 '15 at 16:56
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Why would anyone use set instead of unordered_set?
...re preferred to hash tables. Hash tables particularly suck at things like "range intersections."
– Mehrdad Afshari
Aug 28 '09 at 22:56
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Most common C# bitwise operations on enums
...asGrapes = value.Has(SomeType.Grapes); //true
value = value.Add(SomeType.Oranges);
value = value.Add(SomeType.Apples);
value = value.Remove(SomeType.Grapes);
bool hasOranges = value.Has(SomeType.Oranges); //true
bool isApples = value.Is(SomeType.Apples); //false
bool hasGrapes = value.Has(SomeType...