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PostgreSQL query to return results as a comma separated list
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You can use the array() and array_to_string() functions togetter with your query.
With SELECT array( SELECT id FROM table ); you will get a result like: {1,2,3,4,5,6}
Then, if you wish to remove the {} signs, you can just use the array_to_string() ...
Impossible to Install PG gem on my mac with Mavericks
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If you want to avoid using MacPorts, you can download the Postgres App and place it into the Application directory.
Then, specify the location of newly downloaded pg_config:
gem install pg -- --with-pg-config=/Applications/Postgres.app/Contents/Versions/latest/bin/pg_config
If you run in to...
Is it possible to decrypt MD5 hashes?
...hat there are 2128 possible MD5 hashes. That is a reasonably large number, and yet it is most definitely finite. And yet, there are an infinite number of possible inputs to a given hash function (and most of them contain more than 128 bits, or a measly 16 bytes). So there are actually an infinite nu...
How to get a function name as a string?
...es indicate to the reader this is a special attribute. As a bonus, classes and modules have a __name__ attribute too, so you only have remember one special name.
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React JSX: selecting “selected” on selected option
...even easier for you. Instead of defining selected on each option, you can (and should) simply write value={optionsState} on the select tag itself:
<select value={optionsState}>
<option value="A">Apple</option>
<option value="B">Banana</option>
<option value="C"...
Kill child process when parent process is killed
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From this forum, credit to 'Josh'.
Application.Quit() and Process.Kill() are possible solutions, but have proven to be unreliable. When your main application dies, you are still left with child processes running. What we really want is for the child processes to die as soon as t...
Redirecting EC2 Elastic Load Balancer from HTTP to HTTPS
...is in the console, do the the following:
Go to your Load Balancer in EC2 and tab "Listeners"
Select "View/edit rules" on your HTTP listener
Delete all rules except for the default one (bottom)
Edit default rule: choose "Redirect to" as an action, leave everything as default and enter "443" as a po...
jQuery - getting custom attribute from selected option
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You're adding the event handler to the <select> element.
Therefore, $(this) will be the dropdown itself, not the selected <option>.
You need to find the selected <option>, like this:
var option = $('option:selected', this).attr('m...
Prevent screen rotation on Android
...h I would like to prevent from rotating because I'm starting an AsyncTask, and screen rotation makes it restart.
15 Answers...
Android - print full exception backtrace to log
I have a try/catch block that throws an exception and I would like to see information about the exception in the Android device log.
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