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How does MongoDB sort records when no sort order is specified?
...kloads it is desirable for the storage engine to try to reuse available preallocated space and make decisions about how to most efficiently store data on disk and in memory.
Without any query criteria, results will be returned by the storage engine in natural order (aka in the order they are found)...
Try catch statements in C
... a number of down sides (but is a fun mental exercise):
It will not free allocated memory as there are no deconstructors being called.
You can't have more than 1 try/catch in a scope (no nesting)
You can't actually throw exceptions or other data like in C++
Not thread safe at all
You are setting u...
How do I get the fragment identifier (value after hash #) from a URL?
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You may do it by using following code:
var url = "www.site.com/index.php#hello";
var hash = url.substring(url.indexOf('#')+1);
alert(hash);
SEE DEMO
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Eclipse doesn't highlight references anymore
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works for PHP too if you go to window -> preferences -> php -> editor -> mark occurences
– max4ever
Sep 28 '11 at 15:31
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Vertically align text to top within a UILabel
...abelFrame = CGRectMake(20, 20, 280, 150);
UILabel *myLabel = [[UILabel alloc] initWithFrame:labelFrame];
[myLabel setBackgroundColor:[UIColor orangeColor]];
NSString *labelText = @"I am the very model of a modern Major-General, I've information vegetable, animal, and mineral";
[myLa...
What are file descriptors, explained in simple terms?
....h) opened by default on behalf of shell when the program starts.
FD's are allocated in the sequential order, meaning the lowest possible unallocated integer value.
FD's for a particular process can be seen in /proc/$pid/fd (on Unix based systems).
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How to get all columns' names for all the tables in MySQL?
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<?php
$table = 'orders';
$query = "SHOW COLUMNS FROM $table";
if($output = mysql_query($query)):
$columns = array();
while($result = mysql_fetch_assoc($output)):
$...
Which mime type should I use for mp3
...g to decide which mime type to choose for returning mp3 data (served up by php)
5 Answers
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selecting unique values from a column
...licates
BTW: using explicit column names in SELECT uses less resources in PHP when you're getting a large result from MySQL
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Why is textarea filled with mysterious white spaces?
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Open (and close!) your PHP tags right after, and before, your textarea tags:
<textarea style="width:350px; height:80px;" cols="42" rows="5" name="sitelink"><?php
if($siteLink_val) echo $siteLink_val;
?></textarea>
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