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How to run a background task in a servlet based web application?
... your job here which should run every 5 seconds.
}
}
Yes, that's really all. The container will automatically pickup and manage it.
EJB unavailable? Use ScheduledExecutorService
If your environment doesn't support EJB (i.e. you're not using not a real Java EE server, but a barebones servle...
Delete a closed pull request from GitHub
I accidentally made a wrong pull request and ended up closing the request myself. It's in a closed state right now but it's accessible via direct URL and showing on my activity bar.
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Do you have to put Task.Run in a method to make it async?
... numbers for the sake of this example, granted, it's no processing time at all, it's just a matter of formulating an example here.
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What's the difference between NOT EXISTS vs. NOT IN vs. LEFT JOIN WHERE IS NULL?
... NULL is less efficient
In PostgreSQL, NOT IN is less efficient
In Oracle, all three methods are the same.
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Visual Studio replace tab with 4 spaces?
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You can edit this behavior in:
Tools->Options->Text Editor->All Languages->Tabs
Change Tab to use "Insert Spaces" instead of "Keep Tabs".
Note you can also specify this per language if you wish to have different behavior in a specific language.
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How do I install a plugin for vim?
... that it's completely safe (symlinks don't overwrite existing files, uninstall only deletes symlinks) and easy to keep things updated.
# Easily install vim plugins from a source control checkout (e.g. Github)
#
# alias vim-install=rake -f ~/.vim/rakefile-vim-install
# vim-install
# vim-install unin...
When tracing out variables in the console, How to create a new line?
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In ES6/ES2015 you can use string literal syntax called template literals. Template strings use backtick character instead of single quote ' or double quote marks ". They also preserve new line and tab
const roleName = 'test1';
const role_ID = 'test2';
const modal_ID ...
Equivalent of varchar(max) in MySQL?
... includes a byte or two to encode the length of a given string. So you actually can't declare a varchar of the maximum row size, even if it's the only column in the table.
mysql> CREATE TABLE foo ( v VARCHAR(65534) );
ERROR 1118 (42000): Row size too large. The maximum row size for the used tabl...
What are the differences between vector and list data types in R?
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Technically lists are vectors, although very few would use that term. "list" is one of several modes, with others being "logical", "character", "numeric", "integer". What you are calling vectors are "atomic vectors" in strict R parl...
Uninstall old versions of Ruby gems
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# remove all old versions of the gem
gem cleanup rjb
# choose which ones you want to remove
gem uninstall rjb
# remove version 1.1.9 only
gem uninstall rjb --version 1.1.9
# remove all versions less than 1.3.4
gem uninstall rjb --v...