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Error installing libv8: ERROR: Failed to build gem native extension
...m at /home/gitlab/gitlab/vendor/bundle/ruby/2.1.0/cache/libv8-3.16.14.3-x86_64-linux.gem. It may be corrupted. I remove the whole cache folder and re-run bundle install --full-index --deployment --without development test postgres aws. Works.
– Nick Dong
Mar 2...
Download file of any type in Asp.Net MVC using FileResult?
...sult Download(int fileID)
{
Data.LinqToSql.File file = _fileService.GetByID(fileID);
return new DownloadResult { VirtualPath = GetVirtualPath(file.Path),
FileDownloadName = file.Name };
}
In my example i was storing t...
Difference between Destroy and Delete
...ary key, and no callbacks are executed.
To enforce the object's before_destroy and after_destroy callbacks or any :dependent association options, use #destroy.
ActiveRecord::Persistence.destroy
Deletes the record in the database and freezes this instance to reflect that no changes should b...
How do I delete an exported environment variable?
Before installing gnuplot, I set the environment variable GNUPLOT_DRIVER_DIR = /home/gnuplot/build/src . During the installation, something went wrong.
...
Generating Random Passwords
...Define default min and max password lengths.
private static int DEFAULT_MIN_PASSWORD_LENGTH = 8;
private static int DEFAULT_MAX_PASSWORD_LENGTH = 10;
// Define supported password characters divided into groups.
// You can add (or remove) characters to (from) these groups.
priv...
“open/close” SqlConnection or keep open?
...ion()) {} public SqlConnection GetConnection() { return new SqlConnection(_connectionString); }
– ganders
Jan 23 at 17:12
...
Merge / convert multiple PDF files into one PDF
...eir order is preserved by "*". If its not preserved, using ranges: filename_{0..9}.pdf solves it.
– lepe
Jan 5 '15 at 5:48
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show 18 more co...
How can I drop all the tables in a PostgreSQL database?
...at this will not remove the system tables (such as those that begin with pg_) as they are in a different schema, pg_catalog.
– congusbongus
Aug 4 '14 at 7:07
38
...
When to use os.name, sys.platform, or platform.system?
...,release,version,machine = os.uname()
except AttributeError:
no_os_uname = 1
if no_os_uname or not filter(None, (system, node, release, version, machine)):
# Hmm, no there is either no uname or uname has returned
#'unknowns'... we'll have to poke around the system th...
What's an elegant way to conditionally add a class to an HTML element in a view?
...ad' %>">
Finally, you can use Rail's record tag helpers such as div_for, which will automagically set your ID and class based on the record you give it. Given a Person with id 47:
# <div id="person_47" class="person good">
<% div_for @person, class: (@success ? 'good' : 'bad') do ...