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Calculate a Running Total in SQL Server
... int)
set nocount on
declare @i int
set @i = 0
begin tran
while @i < 10000
begin
insert #t (ord, total) values (@i, rand() * 100)
set @i = @i +1
end
commit
Test 1:
SELECT ord,total,
(SELECT SUM(total)
FROM #t b
WHERE b.ord <= a.ord) AS b
FROM #t a
-- CPU...
Singletons vs. Application Context in Android?
...
+100
I very much recommend singletons. If you have a singleton that needs a context, have:
MySingleton.getInstance(Context c) {
//
...
How to add a border just on the top side of a UIView
...
100
Added capability for rounded corners to Adam Waite's original post, and the multiple edits
Imp...
Java Synchronized Block for .class
...able instances of the class on runtime. This means if in runtime there are 100 instances of DemoClass, then only one thread will be able to execute demoMethod() in any one of instance at a time, and all other instances will be locked for other threads.
Class level locking should always be done to ma...
Check if a value is within a range of numbers
...t - range;
}
so if you wanted to see if x was within ±10 of y:
var x = 100;
var y = 115;
nearInt(x,y,10) = false
I'm using it for detecting a long-press on mobile:
//make sure they haven't moved too much during long press.
if (!nearInt(Last.x,Start.x,5) || !nearInt(Last.y, Start.y,5)) clearTi...
How to remove the arrow from a select element in Firefox
...
The trick that works for me is to
make select width more than 100% and apply overflow:hidden
select {
overflow:hidden;
width: 120%;
}
This is the only way right now to hide dropdown arrow in FF.
BTW. if you want beautiful dropdowns use http://harvesthq.github.com/chosen/
...
PostgreSQL Crosstab Query
...:
select m.typeID, m1.highBid, m2.lowAsk, m1.highBid - m2.lowAsk as diff, 100*(m1.highBid - m2.lowAsk)/m2.lowAsk as diffPercent
from mktTrades m
left join (select typeID,MAX(price) as highBid from mktTrades where bid=1 group by typeID)m1
on m.typeID = m1.typeID
left join (select typeID,MIN...
Returning first x items from array
... items than the array has, it simply returns the entire array.
numbers[0..100] # => [1,2,3,4,5,6]
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What makes JNI calls slow?
...e cost can be linear in the size of the array. I measured JNI copying of a 100,000 array to average about 75 microseconds on my Windows desktop, and 82 microseconds on Mac. Fortunately, direct access may be obtained via GetPrimitiveArrayCritical or NewDirectByteBuffer.
If the method is passed an obj...
break out of if and foreach
...ent use return instead of break or continue.
<?php
for ($i=0; $i < 100; $i++) {
if (i%2 == 0) {
include(do_this_for_even.php);
}
else {
include(do_this_for_odd.php);
}
}
?>
If you want to break when being inside do_this_for_even.php you need to use retu...