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How to run a background task in a servlet based web application?
...c void someDailyJob() {
// Do your job here which should run every start of day.
}
@Schedule(hour="*/1", minute="0", second="0", persistent=false)
public void someHourlyJob() {
// Do your job here which should run every hour of day.
}
@Schedule(hour="*", minute=...
Can I change the root EBS device of my amazon EC2 instance?
...he root EBS volume.
Attach the alternate EBS volume as the root: /dev/sda1
Start the instance.
This presupposes that your alternate EBS volume is bootable, of course - it has to contain the bootable OS image.
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Node.js Error: Cannot find module express
...e too. I had winston installed globally, which worked for some reason when starting my app as a normal user, but when starting my app and a system init script it wouldn't work. I fixed it by installing winston locally in the app directory (and adding it to package.json).
– trus...
Syntax highlighting for Jade in Sublime Text 2?
I just started using Sublime Text 2 on Mac. I also just started using Jade for my views in Node.js, and am wondering if there is a way to add syntax highlighting for Jade into Sublime Text 2.
...
Haskell testing workflow
I just started a new Haskell project and wanted to set up a good testing workflow from the beginning. It seems like Haskell has a lot of excellent and unique testing tools and many different ways to integrate them.
...
How to get elements with multiple classes
...collection of nodes. The nodes can be accessed by index numbers. The index starts at 0.
also learn more about https://www.w3schools.com/jsref/met_document_queryselectorall.asp
== Thank You ==
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Extract a substring according to a pattern
... [1] "E001" "E002" "E003"
4) substring
This assumes second portion always starts at 4th character (which is the case in the example in the question):
substring(string, 4)
## [1] "E001" "E002" "E003"
4a) substring/regex
If the colon were not always in a known position we could modify (4) by searchi...
HTML5 Canvas Resize (Downscale) Image High Quality?
..._a = 0;
var center_y = (j + 0.5) * ratio_h;
var yy_start = Math.floor(j * ratio_h);
var yy_stop = Math.ceil((j + 1) * ratio_h);
for (var yy = yy_start; yy < yy_stop; yy++) {
var dy = Math.abs(center_y - (yy + 0.5)) / ratio_h_half;
...
How to install MySQLdb (Python data access library to MySQL) on Mac OS X?
...lution. I've reproduced it with a couple of edits below
Step 0:
Before I start, I assume that you have MySQL, Python, and GCC installed on the mac.
Step 1:
Download the latest MySQL for Python adapter from SourceForge.
Step 2:
Extract your downloaded package:
tar xzvf MySQL-python-1.2.2.tar.gz
...
Refreshing web page by WebDriver when waiting for specific condition
...make sure this works 100% by adding a manual check whether the page really started reloading.
Here's the code I wrote for that in our base page object class:
public void reload() {
// remember reference to current html root element
final WebElement htmlRoot = getDriver().findElement(By.tag...