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An “and” operator for an “if” statement in Bash
I'm trying to create a simple Bash script to check if the website is down and for some reason the "and" operator doesn't work:
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What's the difference between xsd:include and xsd:import?
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tony19
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answered Mar 1 '10 at 18:15
Sergiy BelozorovS...
how to append a list object to another
...be better, since it just involves adjusting a couple of pointers in the linked lists.
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Find difference between timestamps in seconds in PostgreSQL
I have a table in PostgreSQL 8.3 with 2 timestamp columns. I would like to get the difference between these timestamps in seconds. Could you please help me how to get this done?
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Checking user's homepage in Internet Explorer
Google displays a popup that asks if you want to set your home page as google.com. It's quite normal, when I say OK it sets it as google.com. After that however, I don't get the popup anymore. As far as I know, nobody should be able to retrieve the value of my homepage because it's a private info. B...
Positioning a div near bottom side of another div
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Tested and working on Firefox 3, Chrome 1, and IE 6, 7 and 8:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
<html><body>
<div style='background-color:...
In C, how should I read a text file and print all strings
...er, and a plain char may be unsigned.
If you want to read the file in chunks, but without dynamic memory allocation, you can do:
#define CHUNK 1024 /* read 1024 bytes at a time */
char buf[CHUNK];
FILE *file;
size_t nread;
file = fopen("test.txt", "r");
if (file) {
while ((nread = fread(buf, ...
How to use hex color values
..., e.g 0xFF
To simplify the conversion, let's create an initializer that takes integer (0 - 255) values:
extension UIColor {
convenience init(red: Int, green: Int, blue: Int) {
assert(red >= 0 && red <= 255, "Invalid red component")
assert(green >= 0 && gre...
How to run a single test from a rails test suite?
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NOTE: This doesn't run the test via rake. So any code you have in Rakefile will NOT get executed.
To run a single test, use the following command from your rails project's main directory:
ruby -I test test/unit/my_model_test.rb -n test_name
This runs a single...
How to detect idle time in JavaScript elegantly?
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Here is a simple script using JQuery that handles mousemove and keypress events.
If the time expires, the page reload.
<script type="text/javascript">
var idleTime = 0;
$(document).ready(function () {
//Increment the idle time counter every minute.
var idleInterval = setInt...