04-18-2013
Quote:
Originally Posted by
Pranaveen
Hi,
I'm new to this and very much interested to learn unix.
Can any one explain me the symbols y we use this is scripting(~ and $).
It would be great if some one explain with the eg.
Thanks
Naveen A
Naveen,
I think hanson44 pretty well described many of the uses of $. The $ is also used to represent the end of a string in a regular expression and can actually be used to represent the dollar sign symbol in a string (depending on context and they types of quotes used to delimit the string).
The ~ is used to represent a user's home directory when it is unquoted at the start of a pathname. It can be used by itself to represent the home directory of the user who is currently logged in (such as
vi ~/.profile to edit a file named .profile in your home directory) or with a user's name to represent that user's home directory (such as
vi ~dwc/.profile to try to edit the file named .profile in my home directory).
Last edited by Don Cragun; 04-18-2013 at 02:30 AM..
Reason: add missing closing square bracket
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LEARN ABOUT DEBIAN
jifty::plugin::sqlqueries
Jifty::Plugin::SQLQueries(3pm) User Contributed Perl Documentation Jifty::Plugin::SQLQueries(3pm)
NAME
Jifty::Plugin::SQLQueries - Inspect your application's SQL queries
DESCRIPTION
This plugin will log each SQL query, its duration, its bind parameters, and its stack trace. Such reports are available at:
http://your.app/__jifty/admin/requests
USAGE
Add the following to your site_config.yml
framework:
Plugins:
- SQLQueries: {}
You can turn on and off the stacktrace, as well as an "EXPLAIN" of each query, using options to the plugin:
framework:
Plugins:
- SQLQueries:
stacktrace: 0
explain: 1
The plugin defaults to logging the stack trace, but not the explain.
METHODS
init
Sets up a "post_init" hook.
inspect_before_request
Clears the query log so we don't log any unrelated previous queries.
inspect_after_request
Stash the query log.
inspect_render_summary
Display how many queries and their total time.
inspect_render_analysis
Render a template with all the detailed information.
post_init
Tells Jifty::DBI to log queries in a way that records stack traces.
prereq_plugins
This plugin depends on Jifty::Plugin::RequestInspector.
COPYRIGHT AND LICENSE
Copyright 2007-2010 Best Practical Solutions
This is free software and may be modified and distributed under the same terms as Perl itself.
perl v5.14.2 2010-12-10 Jifty::Plugin::SQLQueries(3pm)