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Foreign Key naming scheme
I'm just getting started working with foreign keys for the first time and I'm wondering if there's a standard naming scheme to use for them?
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Does pandas iterrows have performance issues?
...ime)
Using a custom Cython routine is usually too complicated, so let's skip that for now.
1) Vectorization is ALWAYS, ALWAYS the first and best choice. However, there is a small set of cases (usually involving a recurrence) which cannot be vectorized in obvious ways. Furthermore, on a smallish D...
How do I convert a dictionary to a JSON String in C#?
...ert my Dictionary<int,List<int>> to JSON string. Does anyone know how to achieve this in C#?
13 Answers
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Upgrade python packages from requirements.txt using pip command
How do I upgrade all my python packages from requirements.txt file using pip command?
13 Answers
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Replacement for “rename” in dplyr
I like plyr's renaming function rename . I have recently started using dplyr, and was wondering if there is an easy way to rename variables using a function from dplyr, that is as easy to use as to plyr's rename ?
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How to get index using LINQ? [duplicate]
Given a datasource like that:
7 Answers
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Order by multiple columns with Doctrine
... column2 DESC');
As you have noted, multiple calls to orderBy do not stack, but you can make multiple calls to addOrderBy:
$qb->addOrderBy('column1', 'ASC')
->addOrderBy('column2', 'DESC');
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What is the idiomatic Go equivalent of C's ternary operator?
...y to do conditionals in Go.
In addition to the full blown var+if+else block of code, though, this spelling is also used often:
index := val
if val <= 0 {
index = -val
}
and if you have a block of code that is repetitive enough, such as the equivalent of int value = a <= b ? a : b, you ...
How to detect READ_COMMITTED_SNAPSHOT is enabled?
...OMMITTED isolation level are based on snapshot scans and do not acquire locks.
0 (default): READ_COMMITTED_SNAPSHOT option is OFF. Read operations under the READ COMMITTED isolation level use Shared (S) locks.
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Finding the author of a line of code in Mercurial
How do I find out who is responsible for a specific line of code? I know the linenumber and the filename but I would like Mercurial to tell me the author(s) of that specific line of code. Is there a command for that?
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