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Is there a way to make R beep/play a sound at the end of a script?
...beepr and make a sound:
install.packages("beepr")
library(beepr)
beep()
More info at github: https://github.com/rasmusab/beepr
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Sorting a Python list by two fields
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+1: More elegant than mine. I forgot that itemgetter can take multiple indices.
– dappawit
Mar 6 '11 at 19:43
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In log4j, does checking isDebugEnabled before logging improve performance?
...xity of the code because there are fewer branches.
Better yet is to use a more up-to-date logging framework where the log statements take a format specification and a list of arguments to be substituted by the logger—but "lazily," only if the logger is enabled. This is the approach taken by slf4j...
Difference between \w and \b regular expression meta characters
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It's more correct to say that it's the boundary between a word character and not a word character because it also matches between a word character and the start or end of a string if that character is at the start/end of the strin...
Remove last character from string. Swift language
... // "Hello, Worl" (modifying)
Swift 3.0
The APIs have gotten a bit more swifty, and as a result the Foundation extension has changed a bit:
var name: String = "Dolphin"
var truncated = name.substring(to: name.index(before: name.endIndex))
print(name) // "Dolphin"
print(truncated) // "D...
How to get the current date and time
...eatures. See the official documentation and many other online articles for more information.
– DavidS
Feb 2 '16 at 20:46
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Plot two graphs in same plot in R
...ot.function() to plot your function (read up on multiple dispatch to learn more about this). However, lines.function() is not defined, so lines() doesn't know what to do with a parameter of class function. lines can only deal with your data and time series objects of class ts.
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How to convert std::string to lower case?
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Object reference not set to an instance of an object.Why doesn't .NET show which object is `null`?
...he debugger. So, the question is, what's the reason for not including some more info on what exactly returned null - note that the OP doesn't claim he or she wants to know that for release builds, as well, debug builds may be sufficient.
– O. R. Mapper
Feb 9 '1...
jQuery object equality
...rder-sensitive. something like stackoverflow.com/a/29648479 would work in more cases, although it's slower.
– Jayen
Dec 26 '15 at 1:57
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