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How do you cast a List of supertypes to a List of subtypes?
...st works; but it doesn't work because you can't cast a generic type of one parameter to another. However, you can cast through an intermediate wildcard type and it will be allowed (since you can cast to and from wildcard types, just with an unchecked warning):
List<TestB> variable = (List<...
An example of how to use getopts in bash
...nded value. You can hack around this if you absolutely know that an option parameter cannot look like another valid option, yes, but one could say there's a reason optional arguments are not defined in POSIX.
– Adrian Frühwirth
Mar 13 '15 at 9:40
...
Asynchronous Requests with Python requests
...ns. Number of concurrent requests can be increased by defining max_workers parameter
– Jose Cherian
Sep 20 '15 at 22:22
...
Using PUT method in HTML form
...>, i.e. send a GET request.
Instead, many frameworks simply use a POST parameter to tunnel the HTTP method:
<form method="post" ...>
<input type="hidden" name="_method" value="put" />
...
Of course, this requires server-side unwrapping.
...
Detect blocked popup in Chrome
...
This worked for me:
cope.PopupTest.params = 'height=1,width=1,left=-100,top=-100,location=no,toolbar=no,menubar=no,scrollbars=no,resizable=no,directories=no,status=no';
cope.PopupTest.testWindow = window.open("popupTest.htm", "popupTest", cope.PopupTest.pa...
Creating PHP class instance with a string
...123
And variable functions & methods.
$func = 'my_function';
$func('param1'); // calls my_function('param1');
$method = 'doStuff';
$object = new MyClass();
$object->$method(); // calls the MyClass->doStuff() method.
...
Common xlabel/ylabel for matplotlib subplots
...ot(111, frameon=False)
# hide tick and tick label of the big axis
plt.tick_params(labelcolor='none', top=False, bottom=False, left=False, right=False)
plt.xlabel("common X")
plt.ylabel("common Y")
This results in the following (with matplotlib version 2.2.0):
...
How to create duplicate allowed attributes
...bute constructor take an array of strings, a string[], with or without the params modifier. Then it could be applied with the syntax [MyCustom("CONTROL", "ALT", "SHIFT", "D")] (with params).
– Jeppe Stig Nielsen
Oct 13 '13 at 15:15
...
Rails: fields_for with index?
...ite simple as the solution is provided within Rails. You can use f.options params. So, inside your rendered _some_form.html.erb,
Index can be accessed by:
<%= f.options[:child_index] %>
You don't need to do anything else.
Update: It seems that my answer wasn't clear enough...
Original...
C# How can I check if a URL exists/is valid?
... it does not return server or protocol errors
/// </summary>
/// <param name="url">The path to check</param>
/// <returns></returns>
public bool UrlIsValid(string url)
{
try
{
HttpWebRequest request = HttpWebRequest.Create(url) as HttpWebRequest;
...