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What does Html.HiddenFor do?
...
It creates a hidden input on the form for the field (from your model) that you pass it.
It is useful for fields in your Model/ViewModel that you need to persist on the page and have passed back when another call is made but shouldn't be seen by the user.
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Convert JavaScript string in dot notation into an object reference
...a sign that there is something very wrong going on (unless maybe you're performing some strange deserialization).
That is to say, novices who find their way to this answer must ask themselves the question "why am I doing this?"
It is of course generally fine to do this if your use case is ...
How do I make a textbox that only accepts numbers?
I have a windows forms app with a textbox control that I want to only accept integer values. In the past I've done this kind of validation by overloading the KeyPress event and just removing characters which didn't fit the specification. I've looked at the MaskedTextBox control but I'd like a more g...
“implements Runnable” vs “extends Thread” in Java
...If you don't need a particular result, consider using constructions of the form:
Future<?> f = new FutureTask<Object>(runnable, null)
So, if we replace their runnable with your threadA, we get the following:
new FutureTask<Object>(threadA, null)
Another option that allows yo...
Runtime vs. Compile time
...he program need not satisfy any invariants. In fact, it needn't be a well-formed program at all. You could feed this HTML to the compiler and watch it barf...
What can go wrong at compile time:
Syntax errors
Typechecking errors
(Rarely) compiler crashes
If the compiler succeeds, what do we know...
Rails new vs create
...eated differently.
An HTTP GET to /resources/new is intended to render a form suitable for creating a new resource, which it does by calling the new action within the controller, which creates a new unsaved record and renders the form.
An HTTP POST to /resources takes the record created as part o...
Easiest way to read from and write to files
...at usually one Xml object corresponds with one file, while several strings form one file.
– Roland
Sep 15 '14 at 13:23
7
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#import using angle brackets < > and quote marks “ ”
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Objective-C has this in common with C/C++; the quoted form is for "local" includes of files (you need to specify the relative path from the current file, e.g. #include "headers/my_header.h"), while the angle-bracket form is for "global" includes -- those found somewhere on the i...
Detecting Browser Autofill
...ange event.
Safari 5 and Chrome 9 do dispatch the change event.
For other form fields:
IE 7 and IE 8 don't dispatch the change event.
Firefox 4 does dispatch the change change event when users select a value from a list of suggestions and tab out of the field.
Chrome 9 does not dispatch the chang...
How do I use the conditional operator (? :) in Ruby?
... in the last case as said issue does not arise.
You can use the "long-if" form for readability on multiple lines:
question = if question.size > 20 then
question.slice(0, 20) + "..."
else
question
end
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