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How can I profile Python code line-by-line?
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I believe that's what Robert Kern's line_profiler is intended for. From the link:
File: pystone.py
Function: Proc2 at line 149
Total time: 0.606656 s
Line # Hits Time Per Hit % Time Line Contents
=================================================...
GraphViz - How to connect subgraphs?
...luster, that can be linked to even if the cluster is empty otherwise. DUMMY_0 [shape=point style=invis]
– DevSolar
Jun 25 '12 at 7:36
2
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How do I find the next commit in git? (child/children of ref)
... E -> F
\ /
D1 -> D2 ----/
The ordering of commits is done by "topo-order" or "date-order" (see GitPro book)
But since Git1.6.0, you can list the children of a commit.
git rev-list --children
git log --children
Note: for parent commits, you have the ...
How do you perform a left outer join using linq extension methods
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You need to remember to Order your joined table or the .FirstOrDefault() is going to get a random row from the multiple rows that might match the join criteria, whatever the database happens to find first.
– Chris Moschini
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Index on multiple columns in Ruby on Rails
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The order does matter in indexing.
Put the most selective field first, i.e. the field that narrows down the number of rows fastest.
The index will only be used insofar as you use its columns in sequence starting at the beginnin...
SQLAlchemy IN clause
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How about
session.query(MyUserClass).filter(MyUserClass.id.in_((123,456))).all()
edit: Without the ORM, it would be
session.execute(
select(
[MyUserTable.c.id, MyUserTable.c.name],
MyUserTable.c.id.in_((123, 456))
)
).fetchall()
select() takes two paramet...
Why are two different concepts both called “heap”?
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Yes, but a heap also implies disorder and memory heaps are generally disordered. The data structure heap is extremely well ordered. So again there's an equal mismatch going the other way based on the common definition of heap.
– jmucch...
Replacing spaces with underscores in JavaScript?
I'm trying to use this code to replace spaces with _, it works for the first space in the string but all the other instances of spaces remain unchanged. Anybody know why?
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Slow Requests on Local Flask Server
...sk run --with-threads which solved my problem.
– arno_v
Apr 13 '18 at 11:33
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show 1 more comment
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How to avoid “if” chains?
...the basic flow, e.g. instead of
if (ok)
{
DoSomething();
}
else
{
_log.Error("oops");
return;
}
... you'd use....
if (!ok)
{
_log.Error("oops");
return;
}
DoSomething(); //notice how this is already farther to the left than the example above
When there is a long series of ...