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My Understanding of HTTP Polling, Long Polling, HTTP Streaming and WebSockets
...nnections from clients puts more load on the server.
WebSockets are a TCP-based protocol and as such don't suffer from this HTTP-level connection limit (but, of course, browser support is not uniform).
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How to truncate the time on a DateTime object in Python?
...The advantage compared to the .replace() method is that datetime.combine()-based solution will continue to work even if datetime module introduces the nanoseconds support.
tzinfo can be preserved if necessary but the utc offset may be different at midnight e.g., due to a DST transition and therefor...
Why is === faster than == in PHP?
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@Marco, when I say "empirical study", I mean it's based on experience, eg: running code instead of making an argument using only reason (or what's in your mind), without an experiment to back it up. Salman A values suggest === is equally sometimes a bit faster and sometimes...
PostgreSQL “DESCRIBE TABLE”
...e.g. numeric(6,2); whereas information_schema.columns will only report the base type of numeric.
– Eli Collins
Dec 6 '14 at 2:26
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What is an .inc and why use it?
... make PHP parse read PHP code from it. Useful when you want to create file based database and want to tell if it's a database file. like .data. You can then use @ClearCrescendo's comment above to secure it.
– Jomar Sevillejo
Dec 8 '15 at 11:28
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Numbering rows within groups in a data frame
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For making this r-faq question more complete, a base R alternative with sequence and rle:
df$num <- sequence(rle(df$cat)$lengths)
which gives the intended result:
> df
cat val num
4 aaa 0.05638315 1
2 aaa 0.25767250 2
1 aaa 0.30776611 3
5 aaa...
How to get a variable value if variable name is stored as string?
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Based on the answer: https://unix.stackexchange.com/a/111627
###############################################################################
# Summary: Returns the value of a variable given it's name as a string.
# Required ...
Choosing between std::map and std::unordered_map [duplicate]
... std::unorderded_map); if you want sorted sequential access, use something based on a vector.
Also, std::map is a balanced tree; and you have to traverse it, or re-balance it, incredibly often. These are cache-killer and cache-apocalypse operations respectively... so just say NO to std::map.
You ...
Composer install error - requires ext_curl when it's actually enabled
... The question's author seems to be running Windows. Windows is not based on Debian.
– huertanix
May 14 '15 at 16:46
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Is there anything like inotify on Windows?
...dFirstChangeNotification. I started writing a Windows event watcher in Go, based heavily on Jeffery Richter's examples. From the bit of testing I did, it is rock solid, and misses nothing, similar to fsevents in OS X. Gist is here: gist.github.com/pkrnjevic/7219861
– Peter Krnj...