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How to drop a PostgreSQL database if there are active connections to it?
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Actually it would disconnect clients one by one, and if you client is in the middle of the list it will be disconnected too. As a result, some connections will stay alive. So, the right answer is by Craig Ringer (see below). SELECT pg_terminate_backend(pg_stat_activ...
What is the purpose of the HTML “no-js” class?
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The no-js class is used by the Modernizr feature detection library. When Modernizr loads, it replaces no-js with js. If JavaScript is disabled, the class remains. This allows you to write CSS which easily targets either condition.
From Modernizrs'...
SQL: How to get the count of each distinct value in a column?
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SELECT
category,
COUNT(*) AS `num`
FROM
posts
GROUP BY
category
share
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improve this answer
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What is the “__v” field in Mongoose
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The versionKey is a property set on each document when first created
by Mongoose. This keys value contains the internal revision of the
document. The name of this document property is configurable. The
default is __v.
If this conflicts with your application you can configure as such:
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How to change the button text of ?
... the same row) while clicking on an image! :/
– sohaiby
May 11 '15 at 12:09
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Where is the syntax for TypeScript comments documented?
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The right syntax is now the one used by TSDoc. It will allow you to have your comments understood by Visual Studio Code or other documentation tools.
A good overview of the syntax is available here and especially here. The precise spec should be "soon" written ...
How to debug PDO database queries?
Before moving to PDO, I created SQL queries in PHP by concatenating strings. If I got database syntax error, I could just echo the final SQL query string, try it myself on the database, and tweak it until I fixed the error, then put that back into the code.
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jQuery 'input' event
... limited to -- pressing keys which modify the input (so, for example, Ctrl by itself will not trigger the event, but Ctrl-V to paste some text will), selecting an auto-completion option, Linux-style middle-click paste, drag-and-drop, and lots of other things.
See this page and the comments on this ...
What's Pros and Cons: putting javascript in head and putting just before the body close
...hoo's Best Practices for Speeding Up Your Web Site:
The problem caused by scripts is that
they block parallel downloads. The
HTTP/1.1 specification suggests that
browsers download no more than two
components in parallel per hostname.
If you serve your images from multiple
hostnames, ...
Removing the fragment identifier from AngularJS urls (# symbol)
... Because IE lt 10 doesn't support html5 history API which were enabled by setting up html5Mode(true). In IE you have to use # in routes.
– Maxim Grach
Feb 8 '13 at 16:50
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