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do { … } while (0) — what is it good for? [duplicate]
I've been seeing that expression for over 10 years now. I've been trying to think what it's good for. Since I see it mostly in #defines, I assume it's good for inner scope variable declaration and for using breaks (instead of gotos.)
...
How can I output leading zeros in Ruby?
I'm outputting a set of numbered files from a Ruby script. The numbers come from incrementing a counter, but to make them sort nicely in the directory, I'd like to use leading zeros in the filenames. In other words
...
The Web Application Project […] is configured to use IIS. The Web server […] could not be found.
...regiis.exe -i
Next once that's run and finished, sometimes running
iisreset
from the command line helps, sometimes you don't need to.
Next, go to your IIS Manager and find you localhost website and choose add a folder.
Browse to the folder in your project that contains the actual ASP.Net proje...
Using try vs if in python
...a few measurements:
>>> import timeit
>>> timeit.timeit(setup="a=1;b=1", stmt="a/b") # no error checking
0.06379691968322732
>>> timeit.timeit(setup="a=1;b=1", stmt="try:\n a/b\nexcept ZeroDivisionError:\n pass")
0.0829463709378615
>>> timeit.timeit(setup="a=1;b=...
Group by with multiple columns using lambda
... new Element { Company = "ORACLE CORP",TypeOfInvestment = "Assets", Worth = 59372 },
new Element { Company = "PEPSICO INC",TypeOfInvestment = "Assets", Worth = 26516 },
new Element { Company = "PROCTER & GAMBL",TypeOfInvestment = "Stocks", Worth = 38...
Renaming branches remotely in Git
...:
$ git branch new-branch-name origin/old-branch-name
$ git push origin --set-upstream new-branch-name
$ git push origin :old-branch-name
Then, to see the old branch name, each client of the repository would have to do:
$ git fetch origin
$ git remote prune origin
NOTE: If your old branch is y...
(413) Request Entity Too Large | uploadReadAheadSize
... use 413 which is correct status code for this type of error.
You need to set maxReceivedMessageSize in your binding. You can also need to set readerQuotas.
<system.serviceModel>
<bindings>
<basicHttpBinding>
<binding maxReceivedMessageSize="10485760">
&...
How do I get the number of days between two dates in JavaScript?
...mewhat clunky. Instead, by explicitly accounting for changes to the UTC offset when DST begins or ends, we can use exact arithmetic:
function treatAsUTC(date) {
var result = new Date(date);
result.setMinutes(result.getMinutes() - result.getTimezoneOffset());
return result;
}
function d...
cartesian product in pandas
...ultiIndex.from_product as an index in an otherwise empty dataframe, then reset its index, and you're done.
a = [1, 2, 3]
b = ["a", "b", "c"]
index = pd.MultiIndex.from_product([a, b], names = ["a", "b"])
pd.DataFrame(index = index).reset_index()
out:
a b
0 1 a
1 1 b
2 1 c
3 2 a
4 ...
Why does a return in `finally` override `try`?
...s any ECMAScript identifier or empty.
It's clear that return false would set completion type of finally as return, which cause try ... finally to do 4. Return F.
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