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Prevent users from submitting a form by hitting Enter
...preferred over keyup as the keyup is too late to block form submit. Historically there was also the keypress, but this is deprecated, as is the KeyboardEvent.keyCode. You should use KeyboardEvent.key instead which returns the name of the key being pressed. When Enter is checked, then this would chec...
Installing PDO driver on MySQL Linux server
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Basically the answer from Jani Hartikainen is right! I upvoted his answer.
What was missing on my system (based on Ubuntu 15.04) was to enable PDO Extension in my php.ini
extension=pdo.so
extension=pdo_mysql.so
restart the web...
What are the underlying data structures used for Redis?
...mplemented using a C dynamic string library so that we don't pay (asymptotically speaking) for allocations in append operations. This way we have O(N) appends, for instance, instead of having quadratic behavior.
Lists are implemented with linked lists.
Sets and Hashes are implemented with hash table...
JComboBox Selection Change Listener?
... in order to complement, ActionListener is also fired if addItem method is called.
– Gabriel Câmara
Feb 23 '15 at 16:01
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HTTP header line break style
...arker for all protocol elements except the entity-body
RFC2616 was technically obsoleted by RFC7230, but it makes no drastic changes and again calls out CRLF as the delimiter in section 3, and that RFC references RFC5234, Appendix B.1 to define "CRLF" as %x0D %x0A.
However, recognizing that peopl...
Get first day of week in SQL Server
...re saying, how many weeks have passed since Monday, January 1, 1900? Let's call that [n]. Ok, now add [n] weeks to Monday, January 1, 1900. You should not be surprised that this ends up being a Monday. DATEADD has no idea that you want to add weeks but only until you get to a Sunday, it's just addin...
How can I expand and collapse a using javascript?
... </ul>
</div>
</div>
With this CSS: (This is to hide the .content stuff when the page loads.
.container .content {
display: none;
padding : 5px;
}
Then, using jQuery, write a click event for the header.
$(".header").click(function () {
$header = $(this);
...
Ruby on Rails. How do I use the Active Record .build method in a :belongs to relationship?
...ve it saved instantly (much like the corresponding "create" method you can call on the collection)
How is rails smart enough? It's magic (or more accurately, I just don't know, would love to find out!)
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In Java, how do I parse XML as a String instead of a file?
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When you call getBytes(), what encoding are you expecting it to use? How are you telling to the XML parser which encoding it's getting? Do you expect it to guess? What happens when you are on a platform where the default encoding isn'...
Why is the standard session lifetime 24 minutes (1440 seconds)?
...HP3 days, PHP itself had no session support.
But an open-source library called PHPLIB, initially written by Boris Erdmann and Kristian Koehntopp from NetUSE AG, provided sessions via PHP3 code.
Session lifetimes were defined in minutes, not seconds. And the default lifetime was 1440 minutes, ...