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Does free(ptr) where ptr is NULL corrupt memory?
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7.20.3.2 The free function
Synopsis
#include <stdlib.h>
void free(void *ptr);
Description
The free function causes the space pointed to by ptr to be deallocated, that is, made
available for further allocation. If ptr is a null point...
Are class names in CSS selectors case sensitive?
I keep reading everywhere that CSS is not case sensitive, but I have this selector
4 Answers
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Convert to/from DateTime and Time in Ruby
..._time
to_time(new_offset(DateTime.now.offset-offset), :local)
end
private
def to_time(dest, method)
#Convert a fraction of a day to a number of microseconds
usec = (dest.sec_fraction * 60 * 60 * 24 * (10**6)).to_i
Time.send(method, dest.year, dest.month, dest.day, dest.hour, d...
How can I implement prepend and append with regular JavaScript?
How can I implement prepend and append with regular JavaScript without using jQuery?
11 Answers
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What's the difference between echo, print, and print_r in PHP?
I use echo and print_r much, and almost never use print .
11 Answers
11
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Limit text length to n lines using CSS
Is it possible to limit a text length to "n" lines using CSS (or cut it when overflows vertically).
13 Answers
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Looping a video with AVFoundation AVPlayer?
Is there a relatively easy way of looping a video in AVFoundation?
17 Answers
17
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Postgresql aggregate array
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Use array_agg: http://www.sqlfiddle.com/#!1/5099e/1
SELECT s.name, array_agg(g.Mark) as marks
FROM student s
LEFT JOIN Grade g ON g.Student_id = s.Id
GROUP BY s.Id
By the way, if you are using Postgres 9.1, you don't need to repeat...
Convert a Git folder to a submodule retrospectively?
Quite often it is the case that you're writing a project of some kind, and after a while it becomes clear that some component of the project is actually useful as a standalone component (a library, perhaps). If you've had that idea from early on, then there's a fair chance that most of that code is ...
Is there an equivalent to CTRL+C in IPython Notebook in Firefox to break cells that are running?
I've started to use the IPython Notebook and am enjoying it. Sometimes, I write buggy code that takes massive memory requirements or has an infinite loop. I find the "interrupt kernel" option sluggish or unreliable, and sometimes I have to restart the kernel, losing everything in memory.
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