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Understanding the meaning of the term and the concept - RAII (Resource Acquisition is Initialization
...e same way in C# by replacing synchronized with lock):
void foo()
{
// etc.
synchronized(someObject)
{
// if something throws here, the lock on someObject will
// be unlocked
}
// etc.
}
... is already using RAII: The mutex acquisition is done in the keyword (synchron...
Android: Want to set custom fonts for whole application not runtime
...out anything (you could add another one for typefaceStyle -- bold, italic, etc.) but now let's see how to use it:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:custom="http://schemas.android.com/apk/res/com.you...
How can I select rows with most recent timestamp for each key value?
...SELECT MAX(timestamp) FROM sensorTable s2 WHERE s1.sensorID = s2.sensorID)
ORDER BY sensorID, timestamp;
Pretty self-explaining I think, but here's more info if you wish, as well as other examples. It's from the MySQL manual, but above query works with every RDBMS (implementing the sql'92 standard...
Group vs role (Any real difference?)
...in beta (like a role) or the users in beta are in alpha (like a group). In order to make terminology like "includes" and visual elements like tree views unambiguous, most rbac systems require you to specify whether the collection at issue is a "group" or a "role" at least for the sake of discussion....
When to use Common Table Expression (CTE)
...erenced more than once. select top 100 * into #tmp from master..spt_values order by 1,2,3,4 select A.number, COUNT(*) from #tmp A inner join #tmp B ON A.number = B.number+1 group by A.number vs with CTE AS (select top 100 * from master..spt_values order by 1,2,3,4) select A.number, COUNT(*) from CT...
mysql_fetch_array()/mysql_fetch_assoc()/mysql_fetch_row()/mysql_num_rows etc… expects parameter 1 to
...been removed in php version 7.
Check $result before passing it to mysql_fetch_array. You'll find that it's false because the query failed. See the mysql_query documentation for possible return values and suggestions for how to deal with them.
$username = mysql_real_escape_string($_POST['username'...
Why is lazy evaluation useful?
...zy language. Strictness also exacerbates the fact that where has no way to order the relative effects at all, except by SCC, it is a statement level construction, its effects could happen in any order strictly, and even if you have a pure language you wind up with the #f issue. Strict where riddles ...
Efficient list of unique strings C#
...ontains no
duplicate elements, and whose elements
are in no particular order.
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Multiple left-hand assignment with JavaScript
...bles var2, var3 are becoming globals
Javascript treats this code in this order:
/*
var 1 is local to the particular scope because of var keyword
var2 and var3 will become globals because they've used without var keyword
*/
var var1; //only variable declarations will be hoisted.
var1= var2= va...
How to concatenate and minify multiple CSS and JavaScript files with Grunt.js (0.3.x)
...n array to explicitly define which files you want to concatenate and their order, or change the structure of your project.
If doing the latter, you could put all your sources under ./src and your built files under ./dest
src
├── css
│ ├── 1.css
│ ├── 2.css
│ ...