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add column to mysql table if it does not exist
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Note that INFORMATION_SCHEMA isn't supported in MySQL prior to 5.0. Nor are stored procedures supported prior to 5.0, so if you need to support MySQL 4.1, this solution isn't good.
One solution used by frameworks that use database mi...
Why should I prefer to use member initialization lists?
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Just to add some additional info to demonstrate how much difference the member initialization list can mak. In the leetcode 303 Range Sum Query - Immutable, https://leetcode.com/problems/range-sum-query-immutable/, where you need to construct and initia...
Allow user to select camera or gallery for image
...ntent> yourIntentsList = new ArrayList<Intent>();
List<ResolveInfo> listCam = packageManager.queryIntentActivities(camIntent, 0);
for (ResolveInfo res : listCam) {
final Intent finalIntent = new Intent(camIntent);
finalIntent.setComponent(new ComponentName(res.activityInfo.pa...
How to debug Apache mod_rewrite
...was changed for 2.4, use instead: LogLevel warn rewrite:trace8 or LogLevel info rewrite:trace8 where 8 can be any number from 1-8
– insaner
Sep 13 '14 at 13:34
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Type converting slices of interfaces
...ariable of type T is just its value in memory. There is no associated type information (in Go every variable has a single type known at compile time not at run time). It is represented in memory like this:
value
An interface{} holding a variable of type T is represented in memory like this
poi...
How can I get selector from jQuery object
... returns *
Edit: If you were to find the selector inside the event, that information should ideally be part of the event itself and not the element because an element could have multiple click events assigned through various selectors. A solution would be to use a wrapper to around bind(), click()...
Javascript seconds to minutes and seconds
... return ret;
}
~~ is a shorthand for Math.floor, see this link for more info
Try online
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Force browser to clear cache
...See also Using the application cache on Mozilla Developer Network for more info.
Update 2016
Things change quickly on the Web.
This question was asked in 2009 and in 2012 I posted an update about a new way to handle the problem described in the question. Another 4 years passed and now it seems tha...
What is WCF RIA services?
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I added some additional info on updates, inserts and deletes.
– Ronald Wildenberg
Sep 10 '10 at 13:41
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How to read environment variables in Scala
...ies
this has a collection of methods that can be used to get environment info, including
scala.util.Properties.envOrElse("HOME", "/myhome" )
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