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Installing Ruby Gem in Windows
... I tried to install GEM on my PC by following the steps given in the site http://rubygems.org/pages/download .
7 Answers
...
MySQL remove all whitespaces from the entire column
...racters :
UPDATE `table` SET `col_name` = REPLACE(`col_name`, '\n', '')
http://dev.mysql.com/doc/refman/5.0/en/string-functions.html#function_replace
To remove first and last space(s) of column :
UPDATE `table` SET `col_name` = TRIM(`col_name`)
http://dev.mysql.com/doc/refman/5.0/en/string-fu...
Export/import jobs in Jenkins
...
Probably use jenkins command line is another option, see https://wiki.jenkins-ci.org/display/JENKINS/Jenkins+CLI
create-job: Creates a new job by reading stdin as a configuration XML file.
get-job: Dumps the job definition XML to stdout
So you can do
java -jar jenkins-cli.jar...
Can you use a trailing comma in a JSON object?
...
No. The JSON spec, as maintained at http://json.org, does not allow trailing commas. From what I've seen, some parsers may silently allow them when reading a JSON string, while others will throw errors. For interoperability, you shouldn't include it.
The cod...
Is there a print_r or var_dump equivalent in Ruby / Ruby on Rails?
...from (irb):17
>>
I also really encourage you to try ruby-debug:
http://railscasts.com/episodes/54-debugging-with-ruby-debug
http://www.sitepoint.com/article/debug-rails-app-ruby-debug/
http://www.datanoise.com/articles/2006/7/12/tutorial-on-ruby-debug
It's incredibly helpful!
...
Highlight the difference between two strings in PHP
...but archive.org has a copy of the site: web.archive.org/web/20080506155528/http://software.zuavra.net/…
– R. Hill
Jan 25 '11 at 13:49
15
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Using psql how do I list extensions installed in a database?
...
In psql that would be
\dx
See the manual for details: http://www.postgresql.org/docs/current/static/app-psql.html
Doing it in plain SQL it would be a select on pg_extension:
SELECT *
FROM pg_extension
http://www.postgresql.org/docs/current/static/catalog-pg-extension.html
...
How to get domain URL and application name?
...e web application name (actually the context path) is available by calling HttpServletrequest#getContextPath() (and thus NOT getServletPath() as one suggested before). You can retrieve this in JSP by ${pageContext.request.contextPath}.
<p>The context path is: ${pageContext.request.contextPat...
How to specify Composer install path?
... "version": "4.0.2",
"dist": {
"url": "http://plugins.symfony-project.org/get/sfGuardPlugin/sfGuardPlugin-4.0.2.tgz",
"type": "tar"
}
}
}
],
"require": {
"sfGuardPlugin": "4.0.*"
}
}
Edi...
callback to handle completion of pipe
...
Based nodejs document, http://nodejs.org/api/stream.html#stream_event_finish,
it should handle writableStream's finish event.
var writable = getWriteable();
var readable = getReadable();
readable.pipe(writable);
writable.on('finish', function(){ ....