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find() with nil when there are no records
...d in rails 4, see this answer stackoverflow.com/a/26885027/1438478 for the new way to find an item by a specific attribute.
– Fralcon
Mar 26 '15 at 20:58
...
How to copy a row and insert in same table with a autoincrement field in MySQL?
...n autoincrement column ID=1 and insert the data into same table as a new row with column ID=2 .
13 Answers
...
Determine on iPhone if user has enabled push notifications
...tifications.
– Apan
Jul 30 '15 at 5:51
5
So in my opinion you should also check [[UIApplication s...
How do you overcome the HTML form nesting limitation?
...rent actions on the resource: "Save" -> POST /my_resource (creating a new resource) "Save" -> PUT /my_resource (modifying an existing resource) "Delete" -> DELETE /my_resource (destroy the resource) RESTfully speaking, the problem is that a POST is expected to create a new resource....
What is the difference between __init__ and __call__?
...
The first is used to initialise newly created object, and receives arguments used to do that:
class Foo:
def __init__(self, a, b, c):
# ...
x = Foo(1, 2, 3) # __init__
The second implements function call operator.
class Foo:
def __call__(s...
What does “zend_mm_heap corrupted” mean
...
nhahtdh
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answered Dec 15 '10 at 19:16
dsmithersd...
Set time to 00:00:00
...ific Daylight Time):
public class Main
{
static SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
public static void main(String[] args)
{
Calendar now = Calendar.getInstance();
now.set(Calendar.HOUR, 0);
now.set(Calendar.MINUTE, 0);
now...
PHP array_filter with arguments
...$arr = array(7, 8, 9, 10, 11, 12, 13);
$matches = array_filter($arr, array(new LowerThanFilter(12), 'isLower'));
print_r($matches);
As a sidenote, you can now replace LowerThanFilter with a more generic NumericComparisonFilter with methods like isLower, isGreater, isEqual etc. Just a thought —...
What does “static” mean in C?
...y in the file it's declared in
(1) is the more foreign topic if you're a newbie, so here's an example:
#include <stdio.h>
void foo()
{
int a = 10;
static int sa = 10;
a += 5;
sa += 5;
printf("a = %d, sa = %d\n", a, sa);
}
int main()
{
int i;
for (i = 0; i &...
How do I manage MongoDB connections in a Node.js web application?
... db object. It's not a singleton connection pool each .connect
creates a new connection pool.
So, to answer your question directly, reuse the db object that results from MongoClient.connect(). This gives you pooling, and will provide a noticeable speed increase as compared with opening/closing c...