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filter for complete cases in data.frame using dplyr (case-wise deletion)
... passing it to the filter.
Another benchmark with more columns:
set.seed(123)
x <- sample(1e5,1e5*26, replace = TRUE)
x[sample(seq_along(x), 1e3)] <- NA
df <- as.data.frame(matrix(x, ncol = 26))
library(microbenchmark)
microbenchmark(
na.omit = {df %>% na.omit},
filter.anonymous = ...
Format decimal for percentage values?
...complete example:
using System.Globalization;
...
decimal myValue = -0.123m;
NumberFormatInfo percentageFormat = new NumberFormatInfo { PercentPositivePattern = 1, PercentNegativePattern = 1 };
string formattedValue = myValue.ToString("P2", percentageFormat); // "-12.30%" (in en-us)
...
How to dynamically create CSS class in JavaScript and apply?
...ate dynamic css stylesheets.
$.injectCSS({
"#test": {
height: 123
}
});
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How do I replace multiple spaces with a single space in C#?
... 30 persons just blindfold up-voted this answer :)
– 123iamking
Sep 8 '17 at 3:50
add a comme...
Skip certain tables with mysqldump
...
123
Building on the answer from @Brian-Fisher and answering the comments of some of the people on ...
What is the use of GO in SQL Server Management Studio & Transact SQL?
...from employees;
GO -- GO 1
update employees set empID=21 where empCode=123;
GO -- GO 2
In the above example, statements before GO 1 will go to sql sever in a batch and then any other statements before GO 2 will go to sql server in another batch. So as we see it has separated batches.
...
Express next function, what is it really for?
...listening on port 3000!')
});
If you do
curl http://localhost:3000/user/123
you will see this printed to console:
before request handler
handling request
after request handler
Now if you comment out the call to next() in the middle handler like this:
app.get('/user/:id', function (req, res,...
Spring MVC: Complex object as GET @RequestParam
...w data sent to the server is;
...
id=pr&preferences%5BuserId%5D=1005012365&preferences%5Baudio%5D=false&preferences%5Btooltip%5D=true&preferences%5Blanguage%5D=en
...
parsed as;
id:pr
preferences[userId]:1005012365
preferences[audio]:false
preferences[tooltip]:true
preferences[l...
`date` command on OS X doesn't have ISO 8601 `-I` option?
...05 (%Y%m)
2013-W18 (%Y-W%V)
2013-W18-5 (%Y-W%V-%u)
2013W185 (%YW%V%u)
2013-123 (%Y-%j, ordinal date)
2013 (%Y)
1559 (%H%M)
15 (%H)
15:59:24+03 (UTC offset doesn't have to include minutes)
These are not:
2013-05-03 15:59 (T is required in the extended format)
201305 (it could be confused with the ...
write a shell script to ssh to a remote machine and execute commands
... -S apt-get install vlc"
HOSTS=("192.168.1.121" "192.168.1.122" "192.168.1.123")
USERNAMES=("username1" "username2" "username3")
PASSWORDS=("password1" "password2" "password3")
for i in ${!HOSTS[*]} ; do
echo ${HOSTS[i]}
SCR=${SCRIPT/PASSWORD/${PASSWORDS[i]}}
sshpass -p ${PASSWORDS[i]...