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React JSX: selecting “selected” on selected option
...way I am currently able to actually keep the option selected (and keep the form's state for future POSTing) is by setting select=true. I have tried setting the defaultValue and value props of the select element, but this does not render in the view by setting the correct option to selected in the op...
How to overload functions in javascript?
...es:
Let's look at jQuery's obj.data() method. It supports four different forms of usage:
obj.data("key");
obj.data("key", value);
obj.data();
obj.data(object);
Each one triggers a different behavior and, without using this dynamic form of overloading, would require four separate functions.
Her...
How to disable admin-style browsable interface of django-rest-framework?
...ause I allow unauthorized POSTs to create new users. This causes the HTML form to be shown with autocompleted data that I don't want to expose. Is there an easy way to prevent this for unauthorized users short of making a custom template?
– jeffjv
Jun 26 '15 ...
When should I use GET or POST method? What's the difference between them?
...for changing something. For example, a search page should use GET, while a form that changes your password should use POST.
Also, note that PHP confuses the concepts a bit. A POST request gets input from the query string and through the request body. A GET request just gets input from the query str...
Regular vs Context Free Grammars
...bset of context-free grammar.
So for a palindrome for instance, is of the form,
S->ABA
A->something
B->something
You can clearly see that palindromes cannot be expressed in regular grammar since it needs to be either right or left linear and as such cannot have a non-terminal on both s...
Rails hidden field undefined method 'merge' error
...e also write <%= hidden_field_tag :service, "test" %> when not using form_for |f| ...
– Augustin Riedinger
Sep 24 '14 at 13:30
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How to copy data to clipboard in C#
... classes that lives in different assemblies and different namespaces.
WinForms: use following namespace declaration, make sure Main is marked with [STAThread] attribute:
using System.Windows.Forms;
WPF: use following namespace declaration
using System.Windows;
console: add reference to System....
Validate phone number with JavaScript
... it works perfectly. It validates that the phone number is in one of these formats:
(123) 456-7890 or 123-456-7890
...
How do I upload a file with metadata using a REST web service?
... would need to re-upload the image? There are many cases where multi-part forms are the right solution. It is just not always the case.
– Darrel Miller
Feb 26 '18 at 16:42
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Why Java needs Serializable interface?
...lization is fraught with pitfalls. Automatic serialization support of this form makes the class internals part of the public API (which is why javadoc gives you the persisted forms of classes).
For long-term persistence, the class must be able to decode this form, which restricts the changes you ca...