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How to execute a raw update sql with dynamic binding in rails
... I would trace the Rails code for a normal update to see what it's doing aside from the actual query.
Using prepared queries can save you a small amount of time in the database, but unless you're doing this a million times in a row, you'd probably be better off just building the update with normal ...
How to parse JSON in Scala using standard Scala classes?
...ult = JSON.parseFull(jsonStr)
result match {
// Matches if jsonStr is valid JSON and represents a Map of Strings to Any
case Some(map: Map[String, Any]) => println(map)
case None => println("Parsing failed")
case other => println("Unknown data structure: " + other)
}
...
Difference between adjustResize and adjustPan in android?
...
From the Android Developer Site link
"adjustResize"
The activity's main window is always resized to make room for the soft
keyboard on screen.
"adjustPan"
The activity's main window is not resized to make room for the soft
keyboard. Rathe...
MySQL select 10 random rows from 600K rows fast
...m AS r1 JOIN
(SELECT CEIL(RAND() *
(SELECT MAX(id)
FROM random)) AS id)
AS r2
WHERE r1.id >= r2.id
ORDER BY r1.id ASC
LIMIT 1
This supposes that the distribution of ids is equal, and that there can be gaps in the id list. See the ar...
offsetting an html anchor to adjust for fixed header [duplicate]
...S without any javascript.
Give your anchor a class:
<a class="anchor" id="top"></a>
You can then position the anchor an offset higher or lower than where it actually appears on the page, by making it a block element and relatively positioning it. -250px will position the anchor up 25...
Append text to input field
...
$('#input-field-id').val($('#input-field-id').val() + 'more text');
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<input id="input-field-id" />
...
how to use ng-option to set default value of select element
... modifications and then persist the changes.
<select ng-options="opt.id as opt.name for opt in users" ng-model="selectedUser"></select>
Check the example here:
http://plnkr.co/edit/HrT5vUMJOtP9esGngbIV
sha...
What are the typical reasons Javascript developed on Firefox fails on IE? [closed]
...ode. For example, IE9 supports SVG, <canvas>, <audio> and <video> natively, however you must enable standards compliance mode for them to be available.
General:
Problems with partially loaded documents: It’s a good idea to add your JavaScript in a window.onload or similar ev...
What's the difference between session.persist() and session.save() in Hibernate?
... transient instance persistent.
However, it doesn't guarantee that the
identifier value will be assigned to
the persistent instance immediately,
the assignment might happen at flush
time. The spec doesn't say that, which
is the problem I have with persist().
persist() also guarante...
Javascript : Send JSON Object with Ajax?
... json_decode(file_get_contents('php://input'));
– David
Oct 22 '17 at 8:28
Dear friends can you share this POST ajax w...