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What does O(log n) mean exactly?
...) definition which finally makes sense. +1
– iAteABug_And_iLiked_it
Aug 30 '13 at 17:19
...
std::unique_ptr with an incomplete type won't compile
I'm using the pimpl-idiom with std::unique_ptr :
6 Answers
6
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How to print a groupby object
...
Simply do:
grouped_df = df.groupby('A')
for key, item in grouped_df:
print(grouped_df.get_group(key), "\n\n")
This also works,
grouped_df = df.groupby('A')
gb = grouped_df.groups
for key, values in gb.iteritems():
print(df.ix[...
What is the proper way to re-throw an exception in C#? [duplicate]
...n("Not enough room in array to copy elements starting at index given.");
_innerList.CopyTo(array, arrayIndex);
}
That's not the worse code because it's boilerplate and we can probably just copy it from some other implementation of CopyTo where it wasn't a simple pass-through and we had to implem...
How to read embedded resource text file
...this way, but dynamically, just instead of this: Properties.Resources.Your_resource_name write this: Properties.Resources.ResourceManager.GetObject("Your_resource_name").
– Lkor
Apr 21 at 10:25
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Truncating floats in Python
...imal module
str(Decimal(s).quantize(Decimal((0, (1,), -n)), rounding=ROUND_DOWN))
The first step, converting to a string, is quite difficult because there are some pairs of floating point literals (i.e. what you write in the source code) which both produce the same binary representation and yet s...
Can an AJAX response set a cookie?
...swered Jul 27 '10 at 4:46
this. __curious_geekthis. __curious_geek
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find vs find_by vs where
...d are usually replaced with things like this:
Model.all
Model.first
find_by is used as a helper when you're searching for information within a column, and it maps to such with naming conventions. For instance, if you have a column named name in your database, you'd use the following syntax:
Mod...
How to change the output color of echo in Linux
...-------------------------------+-------------------------|
The 8-bit fast test:
for code in {0..255}; do echo -e "\e[38;05;${code}m $code: Test"; done
The below table shows a summary of 24 bit version of ANSI-color
|------------+-----------+-----------+---------+-------------+--------------------...
iOS start Background Thread
...ou'd probably be better off using Grand Central Dispatch, though:
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
[self getResultSetFromDB:docids];
});
GCD is a newer technology, and is more efficient in terms of memory overhead and lines of code.
Updated w...