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Check if the number is integer
...reliable way:
check.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)...
initialize a numpy array
...by creating a regular list, then append my stuff into it, and finally transform the list to a numpy array as follows :
import numpy as np
big_array = [] # empty regular list
for i in range(5):
arr = i*np.ones((2,4)) # for instance
big_array.append(arr)
big_np_array = np.array(big_array) #...
How can I wrap text in a label using WPF?
... to set Padding="5" to match the padding in my other Label controls on the form. See Rajesh's answer below.
– Bob Kaufman
Jul 21 '18 at 18:34
...
Can I use a hash sign (#) for commenting in PHP?
...
One might think that the # form of commenting is primarily intended to make a shell script using the familiar "shebang" (#!) notation. In the following script, PHP should ignore the first line because it is also a comment. Example:
#!/usr/bin/php
<...
Who is listening on a given TCP port on Mac OS X?
...cess (PID) is listening on the specified TCP port. How do I get the same information on Mac OS X?
17 Answers
...
Is there an easy way to request a URL in python and NOT follow redirects?
... @Hamish requests allows you to access headers both in the canonical form and in lowercase. See docs.python-requests.org/en/master/user/quickstart/…
– Marian
May 12 '17 at 7:21
...
jQuery disable/enable submit button
...ummary
To [...] change DOM properties such as the [...] disabled state of form elements, use the .prop() method.
(http://api.jquery.com/attr/)
As for the disable on change part of the question: There is an event called "input", but browser support is limited and it's not a jQuery event, so jQue...
Android Webview - Completely Clear the Cache
... }
}
catch(Exception e) {
Log.e(TAG, String.format("Failed to clean the cache, error %s", e.getMessage()));
}
}
return deletedFiles;
}
/*
* Delete the files older than numDays days from the application cache
* 0 means all files.
*/
public static voi...
What is boilerplate code?
...eces that were syndicated were sent out to subscribing
newspapers in the form of a mat (i.e. a matrix). Once received,
boiling lead was poured into this mat to create the plate used to
print the piece, hence the name boilerplate. As the article printed
on a boilerplate could not be altered...
How to mock the Request on Controller in ASP.Net MVC?
...ink doesn't work, but the following seems to work _request.Setup(o => o.Form).Returns(new NameValueCollection());
– Vdex
May 31 '12 at 11:26
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