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html5 - canvas element - Multiple layers
...(ctx) are off screen. The image has been previously rendered onto ctx3. In test 1 of this benchmark, I directly render ctx3 onto ctx1. In test 2, I render ctx3 onto ctx2 and then ctx2 to ctx1. Test 2 is 30 times slower than test 1 on my computer. That is why I say using a intermediate canvas is much...
How to append rows to an R data frame
....frame.
Continuing with Julian's f3 (a preallocated data.frame) as the fastest option so far, defined as:
# pre-allocate space
f3 <- function(n){
df <- data.frame(x = numeric(n), y = character(n), stringsAsFactors = FALSE)
for(i in 1:n){
df$x[i] <- i
df$y[i] <- toString(i)
...
How to get label of select option with jQuery?
...st give an id to the select as
<select id=theid>
<option value="test">label </option>
</select>
then you can call the selected label like that:
jQuery('#theid option:selected').text()
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Trigger a Travis-CI rebuild without pushing a commit?
...tegrations & services, find Travis CI and click Edit, you should see a Test Service button. This will trigger a build.
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How to identify all stored procedures referring a particular table
I created a table on development environment for testing purpose and there are few sp's which are refreing this table. Now I have have to drop this table as well as identify all sp's which are referring this table. I am facing difficulty to find list of all sp's. Please suggest some query by assumin...
Cannot create or edit Android Virtual Devices (AVD) from Eclipse, ADT 22.6
...1.7 Update 51 and Eclipse Standard SDK to Kepler Service Release 2 their latest and no resolution to the problems. Also tested under Debian and same results obtained.
Update 5
At https://code.google.com/p/android/issues/detail?id=66661 android project members conforms the problems and promises to ...
PDO support for multiple queries (PDO_MYSQL, PDO_MYSQLND)
...->exec directly.
Using exec
$db = new PDO("mysql:host=localhost;dbname=test", 'root', '');
// works regardless of statements emulation
$db->setAttribute(PDO::ATTR_EMULATE_PREPARES, 0);
$sql = "
DELETE FROM car;
INSERT INTO car(name, type) VALUES ('car1', 'coupe');
INSERT INTO car(name, ty...
What's the difference between “Write-Host”, “Write-Output”, or “[console]::WriteLine”?
...he scenes.
Run this demonstration code and examine the result.
function Test-Output {
Write-Output "Hello World"
}
function Test-Output2 {
Write-Host "Hello World" -foreground Green
}
function Receive-Output {
process { Write-Host $_ -foreground Yellow }
}
#Output piped to another ...
Python function attributes - uses and abuses [closed]
...t makes no sense but it works ;)
>>> def FakeObject():
... def test():
... print "foo"
... FakeObject.test = test
... return FakeObject
>>> x = FakeObject()
>>> x.test()
foo
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Microsecond timing in JavaScript
...
I really liked this response. I ran a few tests and came up with an example you can drop into your console to see that this still will have dramatic collisions when using this. (note I was getting 10% collisions on a good machine even with doing something as expensiv...