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Best practices when running Node.js with port 80 (Ubuntu / Linode) [closed]
...s not only applies to Linode, but Digital Ocean, AWS EC2 and other VPS providers as well. However, on RedHat based systems /etc/rc.local is /ect/rc.d/local.
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How can I open a link in a new window?
I have a click handler for a specific link, inside that I want to do something similar to the following:
10 Answers
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Force HTML5 youtube video
...ding the Youtube API Blog they are experimenting with their new HTML5 Video Player.
5 Answers
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Correct use of flush() in JPA/Hibernate
...ils of em.flush() are implementation-dependent.
In general anyway, JPA providers like Hibernate can cache the SQL instructions they are supposed to send to the database, often until you actually commit the transaction.
For example, you call em.persist(), Hibernate remembers it has to make a database...
Django Server Error: port is already in use
... On mac you need to use sudo lsof -i tcp:8000 then kill the process ids that show up.
– gordonc
Jan 21 '15 at 13:24
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How do you beta test an iphone app?
...ll the steps in using itself, while ibetatest was resorting to a very dry video to explain the process.
– DanF
May 7 '11 at 21:39
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Query an XDocument for elements by name at any depth
... example:
using System;
using System.Xml.Linq;
class Test
{
static void Main()
{
string xml = @"
<root>
<child id='1'/>
<child id='2'>
<grandchild id='3' />
<grandchild id='4' />
</child>
</root>";
XDocument doc = XDoc...
What is the order of precedence for CSS?
I'm trying to figure out why one of my css classes seems to override the other (and not the other way around)
8 Answers
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How do I get SUM function in MySQL to return '0' if no values are found?
...
Use COALESCE to avoid that outcome.
SELECT COALESCE(SUM(column),0)
FROM table
WHERE ...
To see it in action, please see this sql fiddle: http://www.sqlfiddle.com/#!2/d1542/3/0
More Information:
Given three tables (one with all numbers...
How do I check if a Sql server string is null or empty
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I couldn't decide if I should upvote your answer or unclefofa's, since he seems to have answered first, but his answer has been edited after you answered. I ended upvoting both.
– Zecc
Mar 22 '11 at 1...