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add a string prefix to each value in a string column using Pandas
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When I try this as well as any other approach I get a SettingWithCopyWarning. Is there a way to avoid it?
– Madan Ivan
Mar 31 at 10:21
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JavaScript equivalent of PHP's in_array()
Is there a way in JavaScript to compare values from one array and see if it is in another array?
20 Answers
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How do you run a command for each line of a file?
...ces can be supported by changing the separator. To change it to newlines, set the 'IFS' environment variable before the script/command. Ex: export IFS='$\n'
– codesniffer
Sep 14 '18 at 22:58
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How can I shuffle the lines of a text file on the Unix command line or in a shell script?
I want to shuffle the lines of a text file randomly and create a new file. The file may have several thousands of lines.
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Generate a heatmap in MatPlotLib using a scatter data set
I have a set of X,Y data points (about 10k) that are easy to plot as a scatter plot but that I would like to represent as a heatmap.
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In Python, how do I index a list with another list?
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Why is f(i = -1, i = -1) undefined behavior?
...also nothing to say that the compiler cannot optimize that into a separate set of instructions that has the same effect, but which could fail if the operation was interleaved with another operation on the same memory location.
For example, imagine that it was more efficient to zero the memory, then...
What is an xs:NCName type and when should it be used?
...ition.
http://www.w3.org/TR/xmlschema-2/#dt-ccesN
\i is the escape for the set of initial XML name characters and \c is the set of XML name characters. [\i-[:]] means a set that consist of the set \i excluding a set that consist of the colon character :. So in plain English it would mean "any initi...
Easy way to test a URL for 404 in PHP?
...he error code using curl_getinfo as such:
$handle = curl_init($url);
curl_setopt($handle, CURLOPT_RETURNTRANSFER, TRUE);
/* Get the HTML or whatever is linked in $url. */
$response = curl_exec($handle);
/* Check for 404 (file not found). */
$httpCode = curl_getinfo($handle, CURLINFO_HTTP_CODE);
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What are the lesser known but useful data structures?
...nger than a char, which is a shame. They're only suitable for certain data-sets.
– Joe
Jan 29 '10 at 12:06
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