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memory_get_peak_usage() with “real usage”
...ory alignment). It doesn't reflect memory wasted due to blocks not fitting into space remaining in already allocated segments. If you change your example to allocate (1024 * 256) bytes and a 2M limit, the difference of two will become more apparent.
– cleong
Ma...
Combine two columns of text in pandas dataframe
...arter"]
If one (or both) of the columns are not string typed, you should convert it (them) first,
df["period"] = df["Year"].astype(str) + df["quarter"]
Beware of NaNs when doing this!
If you need to join multiple string columns, you can use agg:
df['period'] = df[['Year', 'quarter', ...]].a...
What's the equivalent of use-commit-times for git?
... Agreed. You shouldn't be confusing a DVCS with a distribution system. git is a DVCS, for manipulating source code that will be built into your final product. If you want a distribution system, you know where to find rsync.
– Randal Schwartz
Dec 26...
How to round to 2 decimals with Python?
...etting a lot of decimals in the output of this code (Fahrenheit to Celsius converter).
16 Answers
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What is the best way to get the count/length/size of an iterator?
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Using Guava library, another option is to convert the Iterable to a List.
List list = Lists.newArrayList(some_iterator);
int count = list.size();
Use this if you need also to access the elements of the iterator after getting its size. By using Iterators.size() you...
How to flatten tree via LINQ?
...n then filter by group using Where(...).
To earn some "points for style", convert Flatten to an extension function in a static class.
public static IEnumerable<MyNode> Flatten(this IEnumerable<MyNode> e) =>
e.SelectMany(c => c.Elements.Flatten()).Concat(e);
To earn more poi...
Memoization in Haskell?
... r = l + s
s' = s * 2
Since we can index, you can just convert a tree into a list:
toList :: Tree a -> [a]
toList as = map (index as) [0..]
You can check the work so far by verifying that toList nats gives you [0..]
Now,
f_tree :: Tree Int
f_tree = fmap (f fastest_f) nat...
How do I work around JavaScript's parseInt octal behavior?
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This whole question is about alternatives to parseInt for converting strings to integers. Thus: always.
– Grodriguez
Oct 25 '14 at 9:55
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How to find out what type of a Mat object is with Mat::type() in OpenCV
...u need to know what type an internal OpenCV array is.
Remember OpenCV will convert the jpeg into BGR (or grey scale if you pass '0' to imread) - so it doesn't tell you anything about the original file.
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Vertically align text to top within a UILabel
... Not sure how this will affect the performance if many UILabels are converted to text views.
– ninjaneer
Nov 10 '13 at 12:17
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