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Can dplyr package be used for conditional mutating?
...mark might not be quite fair - in addition to not receiving the same input from the 2nd iteration forward (which might affect timing since DT$g is already allocated?), the result also propagates back to ans1 and therefore might (if R's optimizer deems it necessary? Not sure on this...) avoid another...
How to validate IP address in Python? [duplicate]
... Why the line: "return address.count('.') == 3" ?? Is that left over from your debugging?
– quux
Dec 15 '10 at 15:32
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How do Third-Party “tracking cookies” work?
...iframe src="http://websiteB.com/ad.html></iframe> to serve the ad from website B. Then when your browser goes to fetch http://websiteB.com/ad.html, the response will come back with a Set-Cookie header that sets a cookie with some unique random string. If website C also includes an ad from w...
Difference between return and exit in Bash functions
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From man bash on return [n];
Causes a function to stop executing and return the value specified by n to its caller. If n is omitted, the return status is that of the last command executed in the function body.
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How are parameters sent in an HTTP POST request?
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NOTE: the body is separated from the header by just one blank line.
– Gab是好人
May 2 '16 at 15:15
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Merge git repo into branch of another repo
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You can't merge a repository into a branch. You can merge a branch from another repository into a branch in your local repository. Assuming that you have two repositories, foo and bar both located in your current directory:
$ ls
foo bar
Change into the foo repository:
$ cd foo
Add the...
Is there a Python caching library?
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From Python 3.2 you can use the decorator @lru_cache from the functools library.
It's a Last Recently Used cache, so there is no expiration time for the items in it, but as a fast hack it's very useful.
from functools import...
How do I pass parameters into a PHP script through a webpage?
...2'];
?>
If you want the script to run regardless of where you call it from (command line or from the browser) you'll want something like the following:
EDIT: as pointed out by Cthulhu in the comments, the most direct way to test which environment you're executing in is to use the PHP_SAPI cons...
How to find the JVM version from a program?
... Worth noting that the Java 9 will change the returned value from this string.
– AlBlue
Apr 20 '16 at 19:12
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How to remove indentation from an unordered list item?
I want to remove all indentation from ul . I tried setting margin , padding , text-indent to 0 , but no avail. Seems that setting text-indent to a negative number does the trick - but is that really the only way to remove the indentation?
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