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Should I Dispose() DataSet and DataTable?
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Interesting answer but what about SqlConnection, SqlCommand and SqlDataAdapter, should the Dispose be called explicitly?
– Willy
May 17 '14 at 9:33
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Can javax.persistence.Query.getResultList() return null?
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You are right. JPA specification says nothing about it. But Java Persistence with Hibernate book, 2nd edition, says:
If the query result is empty, a null is returned
Hibernate JPA implementation (Entity Manager) return null when you call query.getResultList() with no...
Executors.newCachedThreadPool() versus Executors.newFixedThreadPool()
... pools with similar properties but
different details (for example,
timeout parameters) may be created
using ThreadPoolExecutor constructors.
In terms of resources, the newFixedThreadPool will keep all the threads running until they are explicitly terminated. In the newCachedThreadPool Thread...
Log to the base 2 in python
...ied, returns the natural logarithm (base e) of x.
In [25]: math.log(8,2)
Out[25]: 3.0
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Using Custom Domains With IIS Express
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This is exactly what I did, was about to write this up, but you beat me to the punch :-) As a side note, if you want to let other dev's see your IIS you may want to do something like "netsh http add urlacl url=dev.example.com:80 user=everyone"
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iOS Detect 3G or WiFi
...ch you use this code. If this were just in a method, reachability would go out of scope and be dealloced at the end of the method and stopNotifier would be called implicitly.
– James Webster
Nov 9 '11 at 21:35
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Difference between Rebuild and Clean + Build in Visual Studio
..."corner case" when your dependency information is messed up and you get an out of order build project of B using the old project A then rebuild A, then rebuild C. etc. A full solution Clean followed by a full solution build will catch this situation while a rebuild won't. So the more paranoid and...
Download file from an ASP.NET Web API method using AngularJS
...st failed with status: " + status);
// Optionally write the error out to scope
$scope.errorDetails = "Request failed with status: " + status;
});
};
Usage:
var downloadPath = "/files/instructions.pdf";
$scope.downloadFile(downloadPath);
Notes:
You should modify your WebApi...
Do htmlspecialchars and mysql_real_escape_string keep my PHP code safe from injection?
...bullet, you just have to santise the input yourself. If you try and filter out bad characters you will surely fail. Take a whitelist approach and only let through the chars which are good. Look at the XSS cheat sheet for examples on how diverse vectors can be
Even if you use htmlspecialchars($strin...
Does name length impact performance in Redis?
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The key you're talking about using isn't really all that long.
The example key you give is for a set, set lookup methods are O(1). The more complex operations on a set (SDIFF, SUNION, SINTER) are O(N). Chances are that populating $userId was a...