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Specifying an Index (Non-Unique Key) Using JPA
... indexes = {@Index(name = "i_company_activity", columnList = "activity_id,company_id")})
public class CompanyActivity{
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What is the performance of Objects/Arrays in JavaScript? (specifically for Google V8)
...t array you're going to be hitting the underlying array data. In V8 specifically, these are essentially the same as a C++ array so those rules will apply. If for some reason you're working with an array that the engine isn't able to determine with confidence is an array, then you're on much shakier ...
Measure the time it takes to execute a t-sql query
... looked for Sql Profiler doc on how to do this but couldn't find doc that didn't require hours of reading. Can you recommend a "Profiler for Dummies" link?
– TheMoot
Jul 26 '12 at 18:05
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How can I make a weak protocol reference in 'pure' Swift (without @objc)
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My problem with this solutions is that calling the delegate causes a crash - EXC_BAD_ACCESS (as noted by others elsewhere). This seems to be bug. The only solution I have found is to use @objc and eliminate all Swift data types from the protocol.
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How do you concatenate Lists in C#?
... you want to assign it to a variable that is List<T>, you'll have to call ToList() on the IEnumerable<T> that is returned.
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Convert INT to VARCHAR SQL
I am using Sybase and I am doing a select which returns me a column called "iftype", but its type is int and I need to convert into varchar. When I try to do the select without the convert function I get this error:
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android image button
...d whatever you want and set the icon as the src.
<ImageButton
android:id="@+id/ImageButton01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/album_icon"
android:background="@drawable/round_button" />
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HTML form readonly SELECT tag/input
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You should keep the select element disabled but also add another hidden input with the same name and value.
If you reenable your SELECT, you should copy its value to the hidden input in an onchange event and disable (or remove) the hidden input.
Here is a demo:
$('#mainform').submit(...
How can I ignore everything under a folder in Mercurial
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Both of those will also filter out a directory called cabin, which might not be what you want. If you're filtering top-level, you can use:
^/bin/
For bin directories below your root, you can omit the ^. There is no need to specify syntax, regexp is the default.
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SQL UPDATE all values in a field with appended string CONCAT not working
...s pretty much all you need:
mysql> select * from t;
+------+-------+
| id | data |
+------+-------+
| 1 | max |
| 2 | linda |
| 3 | sam |
| 4 | henry |
+------+-------+
4 rows in set (0.02 sec)
mysql> update t set data=concat(data, 'a');
Query OK, 4 rows affected (0.01 sec...