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How do you avoid over-populating the PATH Environment Variable in Windows?
...c:\util directory that looks something like:
@"c:\program files\whereever\foo.exe" %*
which essentially creates an alias for the command. It's not necessarily perfect. Some programs really insist on being in the path (that's pretty rare nowadays), and other programs that try to invoke it might ...
MySQL Results as comma separated list
...roup concat() you can use just concat()
Select concat(Col1, ',', Col2) as Foo_Bar from Table1;
edit this only works in mySQL; Oracle concat only accepts two arguments. In oracle you can use something like select col1||','||col2||','||col3 as foobar from table1;
in sql server you would use + inst...
C# Interfaces. Implicit implementation versus Explicit implementation
... : IEnumerable<string>
{
private string[] _list = new string[] {"foo", "bar", "baz"};
// ...
#region IEnumerable<string> Members
public IEnumerator<string> GetEnumerator()
{
foreach (string s in _list)
{ yield return s; }
}
#endregion
...
Unit tests vs Functional tests
... means, generally, that you are testing system functionality -- when I run foo file.txt at the command line, the lines in file.txt become reversed, perhaps. In contrast, a single unit test generally covers a single case of a single method -- length("hello") should return 5, and length("hi") should ...
Ways to circumvent the same-origin policy
...events properly via postMessage:
<script>window.parent.postMessage('foo','*')</script>
Any window may access this method on any other window, at any time, regardless of the location of the document in the window, to send it a message. Consequently, any event listener used to receive m...
Interface vs Base class
...additional features of a class. I'd call it an "is" relationship, like in "Foo is disposable", hence the IDisposable interface in C#.
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'this' vs $scope in AngularJS controllers
...n instance (this) of MyCtrl on the scope for use in the template via {{ MC.foo }}
– William B
Nov 25 '16 at 18:07
Android - how do I investigate an ANR?
...find "waiting to lock"
example : waiting to lock <0xblahblah> (a com.foo.A) held by threadid=74
You can notice that "tid=74" hold a task now. So go to tid=74
tid=74 maybe SUSPENDED state! find main reason!
trace does not always contain "waiting to lock". in this case it is hard to find main...
What is the difference between '>' and a space in CSS selectors?
...t;/div>
but it doesn't match <div class='card'>....<div class='foo'> ... <div class='name'>xxx</div>..</div>....</div>
div.card div.name matches both.
That is, the > selector makes sure that the selected element on the right side
of the > is an immidiat...
Where to define custom error types in Ruby and/or Rails?
...
in rails you can make app/errors directory
# app/errors/foo_error.rb
class FooError < StandardError; end
restart spring/server and it should pick it up
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