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show all tags in git log
...e sure you study this thread, as overriding a signed tag is not as easy:
if you already pushed a tag, the git tag man page seriously advised against a simple git tag -f B to replace a tag name "A"
don't try to recreate a signed tag with git tag -f (see the thread extract below)
(it is about a cor...
How to default to other directory instead of home directory
...c file:
foo() { cd /d/work_space_for_my_company/project/code_source ; }
If the directory name includes spaces or other shell metacharacters, you'll need quotation marks; it won't hurt to add them even if they're not necessary:
foo() { cd "/d/Work Space/project/code_source" ; }
(Note that I've ...
postgresql COUNT(DISTINCT …) very slow
...
Have you considered the effect of caching? If doing three "explain analyze" subsequently, the first one may be slow fetching things from disk while the two latter may be fast fetching from memory.
– tobixen
Jun 28 '12 at 18:45
...
Possible Loss of Fraction
Forgive me if this is a naïve question, however I am at a loss today.
5 Answers
5
...
Creating hidden arguments with Python argparse
...option to enable the hidden ones, and grab that by looking at sysv.args.
If you do this, you have to include the special arg you pick out of sys.argv directly in the parse list if you Assume the option is -s to enable hidden options.
parser.add_argument('-a', '-axis',
dest="ax...
How to provide user name and password when connecting to a network share
...efer the latter, as I sometimes need to maintain multiple credentials for different locations. I wrap it into an IDisposable and call WNetCancelConnection2 to remove the creds afterwards (avoiding the multiple usernames error):
using (new NetworkConnection(@"\\server\read", readCredentials))
using ...
Email address validation using ASP.NET MVC data type attributes
...
If you are using .NET Framework 4.5, the solution is to use EmailAddressAttribute which resides inside System.ComponentModel.DataAnnotations.
Your code should look similar to this:
[Display(Name = "Email address")]
[Require...
What does __FILE__ mean in Ruby?
...preted as "foo.rb".
Edit: Ruby 1.9.2 and 1.9.3 appear to behave a little differently from what Luke Bayes said in his comment. With these files:
# test.rb
puts __FILE__
require './dir2/test.rb'
# dir2/test.rb
puts __FILE__
Running ruby test.rb will output
test.rb
/full/path/to/dir2/test.rb
...
Does the join order matter in SQL?
...ON (a.x, a.y) = (b.x, b.y) and the two queries would still be equivalent.
If however, any of these involved IS NULL or a function that is related to nulls like COALESCE(), for example if the condition was b.ab_id IS NULL, then the two queries would not be equivalent.
...
Can someone explain collection_select to me in clear, simple terms?
...ll be: <select name="post[author_id]">...
# then you should specify some collection or array of rows.
# It can be Author.where(..).order(..) or something like that.
# In your example it is:
Author.all,
# then you should specify methods for generating options
:id, # ...