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error: ‘NULL’ was not declared in this scope
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answered Jan 20 '09 at 17:14
Johannes Schaub - litbJohannes Schaub - litb
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Check if the number is integer
....integer <- function(N){
!grepl("[^[:digit:]]", format(N, digits = 20, scientific = FALSE))
}
check.integer(3243)
#TRUE
check.integer(3243.34)
#FALSE
check.integer("sdfds")
#FALSE
This solution also allows for integers in scientific notation:
> check.integer(222e3)
[1] TRUE
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jQuery - get a list of values of an attribute from elements of a class
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answered May 2 '10 at 16:20
harpoharpo
35.8k1313 gold badges8888 silver badges124124 bronze badges
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How to tell Xcode where my info.plist and .pch files are
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answered Nov 11 '10 at 20:50
AndrewAndrew
7,23555 gold badges3636 silver badges6767 bronze badges
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Python group by
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edited Sep 20 '10 at 8:08
answered Sep 20 '10 at 7:54
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How do you change a repository description on GitHub?
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As of 2020, if you chose the new design in feature preview, meta-information about the repository can be changed by clicking on a cog icon in the right-hand side menu's "About" section:
Upon doing so, a popup will appear where the...
What to add for the update portion in ConcurrentDictionary AddOrUpdate
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You need to pass a Func which returns the value to be stored in the dictionary in case of an up...
.htaccess mod_rewrite - how to exclude directory from rewrite rule
... work? Thanks
– Kelvin
Dec 4 '09 at 20:52
@Kelvin: The alternation ($|/) should handle both cases.
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Git rebase merge conflict cannot continue
... I am fixed, ty!
– AnneTheAgile
Nov 20 '15 at 14:54
3
git status returns: " rebase in progress; o...
Is it possible to reference one CSS rule within another?
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edited Oct 30 '10 at 20:01
answered Oct 30 '10 at 19:56
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