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How do you create a random string that's suitable for a session ID in PostgreSQL?
I'd like to make a random string for use in session verification using PostgreSQL. I know I can get a random number with SELECT random() , so I tried SELECT md5(random()) , but that doesn't work. How can I do this?
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django templates: include and extends
I would like to provide the same content inside 2 different base files.
7 Answers
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Easy way to concatenate two byte arrays
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@vipw The reason why this is elegant is because if/when you wish to concatenate a third array later, you simply add the line outputStream.write( c ); - you don't have to go back and edit the line where you create the result byte array. Also, re-ordering the arrays is simpl...
CALL command vs. START with /WAIT option
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For exe files, I suppose the differences are nearly unimportant.
But to start an exe you don't even need CALL.
When starting another batch it's a big difference,
as CALL will start it in the same window and the called batch has access to the same vari...
How to turn IDENTITY_INSERT on and off using SQL Server 2008?
... No, just stop sending a value for the identity column. Or set it if you want in your app if you want to send a value..... but then why have a column with the identity property set to generate values? We can't decide for you
– gbn
Aug 15 '11 at 10:01
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Deserializing a JSON into a JavaScript object
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provide that page, so it is trusted.
But it might not be competent.
If the server is not rigorous in its JSON encoding,
or if it does not scrupulously validate all of its inputs,
then it could deliver invalid JSON text that could be carrying dangerous script.
The eval function would exe...
How do I turn on SQL debug logging for ActiveRecord in RSpec tests?
...ould try setting the ActiveRecord logger to stdout in your test somewhere. If you're using rspec, maybe in the spec helper?
ActiveRecord::Base.logger = Logger.new(STDOUT)
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JavaScript, get date of the next day [duplicate]
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I don't know if it helps in performance, but it can be simplified by using tomorrow.setDate(tomorrow.getDate() + 1);
– Gustavo Rodrigues
Aug 6 '14 at 14:10
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How do you add CSS with Javascript?
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...on all but (naturally) IE8 and prior, which uses its own marginally-different wording:
sheet.addRule('strong', 'color: red;', -1);
There is a theoretical advantage in this compared to the createElement-set-innerHTML method, in that you don't have to worry about putting special HTML characte...
Convert command line arguments into an array in Bash
...id, you can convert it into an actual array like this:
myArray=( "$@" )
If you just want to type some arguments and feed them into the $@ value, use set:
$ set -- apple banana "kiwi fruit"
$ echo "$#"
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$ echo "$@"
apple banana kiwi fruit
Understanding how to use the argument structure is part...