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Most efficient way to determine if a Lua table is empty (contains no entries)?
... in the metatable as well) and when assigning nil, decrement the counter.
Testing for empty table would be to test the counter with 0.
Here's a pointer to metatable documentation
I do like your solution though, and I honestly can't assume that my solution is faster overall.
...
In Python, how do I split a string and keep the separators?
...x solution that works well on Python 3
# Split strings and keep separator
test_strings = ['<Hello>', 'Hi', '<Hi> <Planet>', '<', '']
def split_and_keep(s, sep):
if not s: return [''] # consistent with string.split()
# Find replacement character that is not used in strin...
How do I analyze a program's core dump file with GDB when it has command-line parameters?
... -s core can be used to dump memory in bulk
Now for the full educational test setup:
main.c
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int myfunc(int i) {
*(int*)(NULL) = i; /* line 7 */
return i - 1;
}
int main(int argc, char...
What's the algorithm to calculate aspect ratio?
...oat:1 solution like 1.77778:1.
If so, what you need to do is find the greatest common divisor (GCD) and divide both values by that. The GCD is the highest number that evenly divides both numbers. So the GCD for 6 and 10 is 2, the GCD for 44 and 99 is 11.
For example, a 1024x768 monitor has a GCD o...
Check a collection size with JSTL
...
<c:if test="${companies.size() > 0}">
</c:if>
This syntax works only in EL 2.2 or newer (Servlet 3.0 / JSP 2.2 or newer). If you're facing a XML parsing error because you're using JSPX or Facelets instead of JSP, then...
Sending multipart/formdata with jQuery.ajax
...pt to submit.
HTML form:
<form enctype="multipart/form-data" action="/test.php"
method="post" class="putImages">
<input name="media[]" type="file" multiple/>
<input class="button" type="submit" alt="Upload" value="Upload" />
</form>
PHP produces this $_FILES, when ...
How to apply a Git patch to a file with a different name and path?
I have two repositories. In one, I make changes to file ./hello.test . I commit the changes and create a patch from that commit with git format-patch -1 HEAD . Now, I have a second repository that contains a file that has the same contents as hello.test but is placed in a different directory under...
Versioning SQL Server database
...s script after each upgrade to the production DB.
A caveat: My automated tests run against a schema-correct but empty database, so this advice will not perfectly suit your needs.
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improve t...
How do I break out of a loop in Scala?
...ral options.
(1a) Use some construct that includes a conditional that you test.
var sum = 0
(0 to 1000).iterator.takeWhile(_ => sum < 1000).foreach(i => sum+=i)
(warning--this depends on details of how the takeWhile test and the foreach are interleaved during evaluation, and probably sh...
Is it possible to target older iOS versions when using Xcode 4.2 and iOS 5 SDK?
...se my iPhone 3Gs with iOS 4.2.1 for debugging. I am only able to debug and test on my iphone 4 with iOS 5 installed.
8 Ans...