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Difference between volatile and synchronized in Java
... B when it reads f.
-- JSR 133 (Java Memory Model) FAQ
So, now both forms of memory barrier (under the current JMM) cause an instruction re-ordering barrier which prevents the compiler or run-time from re-ordering instructions across the barrier. In the old JMM, volatile did not prevent re-or...
doGet and doPost in Servlets
I've developed an HTML page that sends information to a Servlet. In the Servlet, I am using the methods doGet() and doPost() :
...
How to do something before on submit? [closed]
i have a form which has a button that submits the form. I need to do something before submits happen. I tried doing onClick on that button but it happens after the submit.
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Two submit buttons in one form
I have two submit buttons in a form. How do I determine which one was hit serverside?
19 Answers
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Disable orange outline highlight on focus
...nd have run across a persistent problem which arises when a user submits a form using the Go button on the soft keyboard.
1...
What's an elegant way to conditionally add a class to an HTML element in a view?
...ur variable:
<div class="<%= 'ok' if @success %>">
A second form using the ternary ?: operator is useful if you want to choose between two classes:
<div class="<%= @success ? 'good' : 'bad' %>">
Finally, you can use Rail's record tag helpers such as div_for, which will ...
How to set a default value with Html.TextBoxFor?
... bug or feature, since Html.PasswordFor(m => m.Password, new { class = "form-control", value ="default" is rendered into almost the same html, and the "default" go to value being displayed successfully. For example, value=Model.Email works, but value=ViewBag.Email does work. So this accepted answ...
Original purpose of ? [closed]
...ds should not be rendered and provide a means for servers to store state information with a form. This will be passed back to the server when the form is submitted, using the name/value pair defined by the corresponding attributes. This is a work around for the statelessness of HTTP. Another approac...
Detecting an “invalid date” Date instance in JavaScript
...rom other JS contexts (external windows, frames, or iframes), this simpler form may be preferred:
function isValidDate(d) {
return d instanceof Date && !isNaN(d);
}
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Can you require two form fields to match with HTML5?
Is there a way to require the entries in two form fields to match using HTML5? Or does this still have to be done with javascript? For example, if you have two password fields and want to make sure that a user has entered the same data in each field, are there some attributes, or other coding that c...