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How do I clone a subdirectory only of a Git repository?
...
EDIT: As of Git 2.19, this is finally possible, as can be seen in this answer.
Consider upvoting that answer.
Note: in Git 2.19, only client-side support is implemented, server-side support is still missing, so it only works when cloning local repositories...
Check if a table exists in Rails
...? 'kittens'
In Rails 2, 3 & 4 the API is about tables.
# Listing of all tables and views
ActiveRecord::Base.connection.tables
# Checks for existence of kittens table/view (Kitten model)
ActiveRecord::Base.connection.table_exists? 'kittens'
Getting the status of migrations:
# Tells you all...
How can I get a list of build targets in Ant?
... the available built targets without having to search through the file manually. Does ant have a command for this - something like ant show-targets - that will make it list all the targets in the build file?
...
Is there a CSS not equals selector?
...
In CSS3, you can use the :not() filter, but not all browsers fully support CSS3 yet, so be sure you know what you're doing which is now
supported by all major browsers (and has been for quite some time; this is an old answer...).
Example:
<input type="text" value="wi...
Are non-synchronised static methods thread safe if they don't modify static class variables?
... case) are also thread-safe because once created they can't be changed and all threads see the same value. On the other hand if the method was accepting (mutable) Date you could have had a problem. Two threads can simultaneously modify that same object instance, causing race conditions and visibilit...
Make XAMPP/Apache serve file outside of htdocs [closed]
...st
<Directory C:\Projects\transitCalculator\trunk>
Order allow,deny
Allow from all
</Directory>
</VirtualHost>
Open your hosts file (C:\Windows\System32\drivers\etc\hosts).
Add
127.0.0.1 transitcalculator.localhost #transitCalculator
to the end of the fi...
Strange, unexpected behavior (disappearing/changing values) when using Hash default value, e.g. Hash
...ere’s a hint:
h[42] #=> ["a", "b"]
The array returned by each [] call is just the default value, which we’ve been mutating all this time so now contains our new values. Since << doesn’t assign to the hash (there can never be assignment in Ruby without an = present†), we’ve nev...
Extension method and dynamic object
...aren't supported by dynamic typing in the form of extension methods, i.e. called as if they were instance methods. However, this will work:
dynamic dList = list;
Console.WriteLine(Enumerable.First(dList));
Of course, that may or may not be useful. If you could give more information about why and ...
Eclipse: quick search on filename
...
Eclipse does provide similar functions:
Open Resource Shift+Ctrl+R for all resource files (including Java files)
Open Type Shift+Ctrl+T for all Java classes in classpath.
They also filter the list as you type.
Note that they search all files of all opened projects in current workspace.
...
How can I clear the SQL Server query cache?
...CKPOINT;
GO
DBCC DROPCLEANBUFFERS;
GO
From the linked article:
If all of the performance testing is conducted in SQL Server the best approach may be to issue a CHECKPOINT and then issue the DBCC DROPCLEANBUFFERS command. Although the CHECKPOINT process is an automatic internal system proce...