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How to form tuple column from two columns in Pandas
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This method list(zip(df.lat, df.long)) in 124ms is much more efficient than df[['lat', 'long']].apply(tuple, axis=1) in 14.2 s for 900k rows. The ratio is more than 100.
– Pengju Zhao
Aug 2 '17 at 4:21
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How to write trycatch in R
...;- tryCatch(
{
# Just to highlight: if you want to use more than one
# R expression in the "try" part then you'll have to
# use curly brackets.
# 'tryCatch()' will return the last evaluated expression
# in case the "try" part was...
Localization and internationalization, what's the difference?
...ion QA have different test cases, Internationalization is a one-time cost (more or less), and so the more languages you localize to, the higher your ROI. i18n is generally more costly than l10n to any one locale.
– Mike Sickler
Feb 3 '09 at 13:04
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Static Block in Java [duplicate]
... repetitive. The folks that make Java specifications sometimes make things more confusing, but almost always there is a underlying reason to why they did it that way. Stream manipulation, anyone?
– Mindwin
Aug 28 '13 at 19:31
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Missing artifact com.microsoft.sqlserver:sqljdbc4:jar:4.0
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How do I check the operating system in Python?
... platform you are on out of "Linux", "Windows", or "Darwin" (Mac), without more precision, you should use:
>>> import platform
>>> platform.system()
'Linux' # or 'Windows'/'Darwin'
The platform.system function uses uname internally.
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C# version of java's synchronized keyword?
...in older Microsoft compilers it is a lock(this) / lock(Type) - however, in more recent compilers it uses Interlocked updates - so thread-safe without the nasty parts.
This allows more granular usage, and allows use of Monitor.Wait/Monitor.Pulse etc to communicate between threads.
A related blog en...
How does LMAX's disruptor pattern work?
... there are some blog posts that have started to explain the internals in a more readable way. There is an explanation of ring buffer that is the core of the disruptor pattern, a description of the consumer barriers (the part related to reading from the disruptor) and some information on handling mul...
Can I mask an input text in a bat file?
...y should consider upgrading your scripts to use it fully since it's a much more capable scripting language than cmd.exe. However, if you want to keep the bulk of your code as cmd.exe scripts (such as if you have a lot of code that you don't want to convert), you can use the same trick.
First, modif...
How to check if a String contains only ASCII?
... need another third-party library, Colin's answer is much shorter and much more readable. Suggesting third-party libraries is perfectly OK and should not be punished with a negative vote.
– Jesper
Aug 27 '10 at 20:46
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