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What does inverse_of do? What SQL does it generate?
...lt; ActiveRecord::Base
belongs_to :project, :inverse_of=>:tasks
end
Now, in the console:
irb> p = Project.new
=> #<Project id: nil, name: nil, ...>
irb> t = p.tasks.build
=> #<Task id: nil, project_id: nil, ...>
irb> t.project
=> #<Project id: nil, name: nil,...
How can I negate the return-value of a process?
...
Previously, the answer was presented with what's now the first section as the last section.
POSIX Shell includes a ! operator
Poking around the shell specification for other issues, I recently (September 2015) noticed that the POSIX shell supports a ! operator. For examp...
How to draw a rounded Rectangle on HTML Canvas?
...
I needed to do the same thing and created a method to do it.
// Now you can just call
var ctx = document.getElementById("rounded-rect").getContext("2d");
// Draw using default border radius,
// stroke it but no fill (function's default values)
roundRect(ctx, 5, 5, 50, 50);
// To change t...
Reflection: How to Invoke Method with parameters
...called");
Console.WriteLine("Hello" + name + " at " + DateTime.Now);
}
public void Run(string parameters)
{
Console.WriteLine("Run() called");
Console.Write("You typed:" + parameters);
}
public string TestNoParameters()
...
How can I configure my makefile for debug and release builds?
...
I don't know if I'm doing something strange, but to get the debug if statement to work (ifeq (DEBUG, 1)) for me, the DEBUG variable needed wrapped in parentheses like so: ifeq ($(DEBUG), 1).
– shanet
...
What does %~dp0 mean, and how does it work?
...on, substitution of FOR
variable references has been enhanced.
You can now use the following optional
syntax:
%~I - expands %I removing any surrounding quotes (")
%~fI - expands %I to a fully qualified path name
%~dI - expands %I to a drive letter only
%~pI - expa...
How to grant permission to users for a directory using command line in Windows?
...cated. Here's the first couple of help lines:
C:\>cacls
NOTE: Cacls is now deprecated, please use Icacls.
Displays or modifies access control lists (ACLs) of files
You should use icacls instead. This is how you grant John full control over D:\test folder and all its subfolders:
C:\>icacls...
Primary key or Unique index?
...e a composed primary key (person_id, car_id)?
– unbeknown
Jan 28 '09 at 12:20
3
primary key (pers...
Where is the .NET Framework 4.5 directory?
...ead .net framework 4.5). If you open up a vs command prompt you'll see it now gets it from program files as the other article mentions. Whereas I was using a batch file on my path which linked to the old version.
Version numbers
Under framework:
PS C:\Windows\Microsoft.NET\Framework\v4.0.30319&...
optional parameters in SQL Server stored proc?
...
Yes, it is. Declare parameter as so:
@Sort varchar(50) = NULL
Now you don't even have to pass the parameter in. It will default to NULL (or whatever you choose to default to).
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