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Reading Excel files from C#
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Does adding a double.Parse to the Linq query slow it down much?
– Anonymous Type
Dec 19 '10 at 22:06
23
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MySQL indexes - what are the best practices?
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Load Data Efficiently: Indexes speed up retrievals but slow down inserts and deletes, as well as updates of values in indexed columns. That is, indexes slow down most operations that involve writing. This occurs because writing a row requires writing not only the data row, it requires...
How do I insert a linebreak where the cursor is without entering into insert mode in Vim?
...ternary operator to condense the two actions into one key map. Breaking it down, <expr> means the key map's output can dynamic and in this case hinges on the condition getline('.')[col('.')-1]==' ' which is the long winded way to ask vim if the character under the cursor is a space. Finally, t...
Multiple “order by” in LINQ
...es, I concluded that too hastily based on 3.5 not being in the version dropdown in the documentation page; I should have looked all the way down for the version information. Thanks for the correction. :)
– Jordan Gray
Dec 9 '13 at 13:37
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Reduce left and right margins in matplotlib plot
... need is
plt.tight_layout()
before your output.
In addition to cutting down the margins, this also tightly groups the space between any subplots:
x = [1,2,3]
y = [1,4,9]
import matplotlib.pyplot as plt
fig = plt.figure()
subplot1 = fig.add_subplot(121)
subplot1.plot(x,y)
subplot2 = fig.add_subp...
Why can't C++ be parsed with a LR(1) parser?
...head at most k tokens), but only it only takes one counterexample to shoot down pure LR (or the others) parsing.
Most real C/C++ parsers handle this example by using some
kind of deterministic parser with an extra hack: they intertwine parsing with symbol table
collection... so that by the time "x"...
Why should I use Deque over Stack?
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Performance might be a reason. An algorithm I used went down from 7.6 minutes to 1.5 minutes by just replacing Stack with Deque.
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A clean, lightweight alternative to Python's twisted? [closed]
...asynchronous server.
I suppose it's similar to Eventlet in this way.
The downside is that its API is quite different from Python's sockets/threading modules; you need to rewrite a fair bit of your application (or write a compatibility shim layer)
Edit: It seems that there's also cogen, which is s...
AWK: Access captured group from line pattern
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That was a stroll down memory lane...
I replaced awk by perl a long time ago.
Apparently the AWK regular expression engine does not capture its groups.
you might consider using something like :
perl -n -e'/test(\d+)/ && print $1'
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How to recursively delete an entire directory with PowerShell 2.0?
...n my box, and had tried rm -rf folder and of course it failed. I initially down voted the answer (because it said Ubuntu). Thanks to the comment by @chwarr, I tried it without the f and it picked up the alias rather than rm binary. I wish Tuan would update his source (not sure if Tuan knew it was an...