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filter for complete cases in data.frame using dplyr (case-wise deletion)
...function which lets you specify columns (basically everything which dplyr::select can understand) which should not have any NA values (modeled after pandas df.dropna()):
drop_na <- function(data, ...){
if (missing(...)){
f = complete.cases(data)
} else {
f <- complete....
C++11 introduced a standardized memory model. What does it mean? And how is it going to affect C++ p
... byte accesses are atomic (although not ordered) which is why I went with "char" for my example... But I am not even 100% sure about that... If you want to suggest any good "tutorial" references I will add them to my answer
– Nemo
Jun 12 '11 at 0:39
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src/lxml/etree_defs.h:9:31: fatal error: libxml/xmlversion.h: No such file or directory
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The selected answer is right but I just wanted to add for those who use Fedora: libxslt1 is called libxslt when using dnf. So the command is:
sudo dnf install libxml2-devel libxslt-devel
devel for dnf is the same as dev for ap...
SQL Server: Database stuck in “Restoring” state
... restore database wizard in SQL Server Management Studio. This way you can select the specific file locations, the overwrite option, and the WITH Recovery option.
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Adding a new value to an existing ENUM Type
...rget enum):
INSERT INTO pg_enum (enumtypid, enumlabel, enumsortorder)
SELECT 'type_egais_units'::regtype::oid, 'NEW_ENUM_VALUE', ( SELECT MAX(enumsortorder) + 1 FROM pg_enum WHERE enumtypid = 'type_egais_units'::regtype )
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Registry Key '…' has value '1.7', but '1.6' is required. Java 1.7 is Installed and the Registry is P
...va Runtime Environment"- On right hand side you will get 4-5 rows . Please select "CurrentVersion" and right Click( select modify option) Change version to "1.7"
Now the magic has been completed
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Why do people say there is modulo bias when using a random number generator?
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Keep selecting a random is a good way to remove the bias.
Update
We could make the code fast if we search for an x in range divisible by n.
// Assumptions
// rand() in [0, RAND_MAX]
// n in (0, RAND_MAX]
int x;
// Keep searc...
How to configure socket connect timeout
...ame problem by making the socket non-blocking and then putting the fd in a select/poll loop with a timeout value equal to the amount of time we are willing to wait for the connect to succeed.
I found this for Visual C++ and the explanation there also bends towards the select/poll mechanism I expla...
How do I use CSS in Django?
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Just a quick note on those Django docs - make sure you select the documents for the version of Django you're using. Things appear to have changed a lot between versions with regard to static files.
– Sam Starling
Nov 3 '10 at 11:09
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Command line: piping find results to rm
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find /usr/www/bar/htdocs -mtime +15 -exec rm {} \;
Will select files in /usr/www/bar/htdocs older than 15 days and remove them.
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