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Is it possible to specify condition in Count()?
...y old, but I like the NULLIF trick for such scenarios, and I found no downsides so far. Just see my copy&pasteable example, which is not very practical though, but demonstrates how to use it.
NULLIF might give you a small negative impact on performance, but I guess it should still be faster tha...
Rails detect if request was AJAX
...TTP_X_REQUESTED_WITH'] =~ /XMLHttpRequest/ => 0
The docs:
http://apidock.com/rails/v4.2.1/ActionDispatch/Request/xml_http_request%3F
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How do I call an Angular.js filter with multiple arguments?
...rFilter')(yourExpression, arg1, arg2, ...)
There is actually an example hidden in the orderBy filter docs.
Example:
Let's say you make a filter that can replace things with regular expressions:
myApp.filter("regexReplace", function() { // register new filter
return function(input, searchR...
How to access the content of an iframe with jQuery?
...
</script>
</head>
<body>
<iframe src="mifile.html" id="iView" style="width:200px;height:70px;border:dotted 1px red" frameborder="0"></iframe>
</body>
</html>
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JPA: what is the proper pattern for iterating over large result sets?
...setMaxResults(max).getResultList();
}
then, use it like this:
private void iterateAll()
{
int offset = 0;
List<Model> models;
while ((models = Model.getAllModelsIterable(offset, 100)).size() > 0)
{
entityManager.getTransaction().begin();
for (Model model ...
PostgreSQL: Can you create an index in the CREATE TABLE definition?
... answered Jun 4 '11 at 22:04
ridrid
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“tag already exists in the remote" error after recreating the git tag
...or update hooks (whichever hooks exist on the remote). Those hooks can decide whether to allow or reject the tag create/delete/update.
The old-sha1 value is the all-zeros "null" SHA-1 if the tag is being created. The new-sha1 is the null SHA-1 if the tag is being deleted. Otherwise both SHA-1 va...
How to detect page zoom level in all modern browsers?
...body,r = body.getBoundingClientRect(); return (r.left-r.right)/body.offsetWidth; (thanks to this example or this answer)
FF3.5 ONLY: screen.width / media query screen width (see below) (takes advantage of the fact that screen.width uses device pixels but MQ width uses CSS pixels--thanks to Quirksmod...
How to convert a private key to an RSA private key?
...f OpenSSL say BEGIN PRIVATE KEY because they contain the private key + an OID that identifies the key type (this is known as PKCS8 format). To get the old style key (known as either PKCS1 or traditional OpenSSL format) you can do this:
openssl rsa -in server.key -out server_new.key
Alternately, i...
PHP Remove elements from associative array
...etimes an application architecture doesn't want you to mess with the array id, or makes it inconvenient. For instance, I use CakePHP quite a lot, and a database query returns the primary key as a value in each record, very similar to the above.
Assuming the array is not stupidly large, I would use...