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Abusing the algebra of algebraic data types - why does this work?
.... There's no notion of subtraction of types, let alone division and square roots. So I guess my question is: when can you go from an algebraic manipulation assuming X is an element of the real numbers to a true statement about types, and moreover, where the does the correspondence (coefficient of n...
Is there a command to undo git init?
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remove the .git folder in your project root folder
if you installed submodules and want to remove their git, also remove .git from submodules folders
share
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imp...
Why are margin/padding percentages in CSS always calculated against width?
...he simplest case that browsers calculate block widths from the outside in (root to tips), then flow content into those blocks to determine their heights (tips to root).
– sam
Oct 10 '13 at 1:47
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Using crontab to execute script every minute and another every 24 hours [closed]
... runs as the user who submitted it. If you want to run a cron job as a non-root user, you should use the crontab command to submit it (and not worry about where the crontab is stored). Don't mess around with /etc/crontab unless you really need to.
– Keith Thompson
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PostgreSQL: Is it better to use multiple databases with one schema each, or one database with multip
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A PostgreSQL "schema" is roughly the same as a MySQL "database". Having many databases on a PostgreSQL installation can get problematic; having many schemas will work with no trouble. So you definitely want to go with one database and multiple schemas within that database...
Why is IoC / DI not common in Python?
...rt psycopg
self.database_interface = psycopg
elif config_dbms_name == 'mysql':
...
Later code can then create a database interface by writing:
my_db_connection = self.database_interface()
# Do stuff with database.
Instead of the boilerplate factory functions that Java and C++ need, Pyth...
When to add what indexes in a table in Rails
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Not the answer you're looking for? Browse other questions tagged mysql ruby-on-rails activerecord or ask your own question.
How to set my phpmyadmin user session to not time out so quickly? [duplicate]
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To increase the phpMyAdmin Session Timeout, open config.inc.php in the root phpMyAdmin directory and add this setting (anywhere).
$cfg['LoginCookieValidity'] = <your_new_timeout>;
Where <your_new_timeout> is some number larger than 1800.
Note:
Always keep on mind that a short co...
Difference between jQuery `click`, `bind`, `live`, `delegate`, `trigger` and `on` functions (with an
...is attach the handler not to the specified element itself, but to the very root of the HTML tree (the "body" element). Events in DHTML have this funny feature of "bubbling up". Consider this:
<div> <a> <b>text</b> </a> </div>
If you click on "text", then first ...
Get URL of ASP.Net Page in code-behind [duplicate]
... This doesn't work if the application is not hosted on the server root but in a directory. If the application is hosted on www.contoso.com/app/ this will return just www.contoso.com
– linkerro
Oct 3 '12 at 8:58
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