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What's the best way to learn LISP? [closed]
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23 Answers
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How can I create directory tree in C++/Linux?
...es in path
@(#)Author: J Leffler
@(#)Copyright: (C) JLSS 1990-2020
@(#)Derivation: mkpath.c 1.16 2020/06/19 15:08:10
*/
/*TABSTOP=4*/
#include "posixver.h"
#include "mkpath.h"
#include "emalloc.h"
#include <errno.h>
#include <string.h>
/* "sysstat.h" == <sys/stat.h...
Difference between socket and websocket?
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NTUI
31944 silver badges1212 bronze badges
answered Feb 11 '11 at 20:27
Pablo Santa CruzPablo Santa Cruz
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Where can I learn how to write C code to speed up slow R functions? [closed]
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72
Well there is the good old Use the source, Luke! --- R itself has plenty of (very efficient) C c...
The opposite of Intersect()
...ant to get 4 as the result, you can do like this:
var nonintersect = array2.Except(array1);
If you want the real non-intersection (also both 1 and 4), then this should do the trick:
var nonintersect = array1.Except(array2).Union( array2.Except(array1));
This will not be the most performant sol...
sql ORDER BY multiple values in specific order?
...a') ...
ORDER BY
CASE x_field
WHEN 'f' THEN 1
WHEN 'p' THEN 2
WHEN 'i' THEN 3
WHEN 'a' THEN 4
ELSE 5 --needed only is no IN clause above. eg when = 'b'
END, id
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PostgreSQL error 'Could not connect to server: No such file or directory'
...ate in my project or even try most database tasks for my Ruby on Rails 3.2 applications.
22 Answers
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How can I get the length of text entered in a textbox using jQuery?
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324
var myLength = $("#myTextbox").val().length;
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Split by comma and strip whitespace in Python
...", "of", "spaces", "here"]
See: Python docs on List Comprehension
A good 2 second explanation of list comprehension.
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