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Passing multiple error classes to ruby's rescue clause in a DRY fashion
...ne it in some other class, you have to refer to it with its namespace. Actually, it does not have to be a constant.
Splat Operator
The splat operator * "unpacks" an array in its position so that
rescue *EXCEPTIONS
means the same as
rescue FooException, BarException
You can also use it withi...
Do the parentheses after the type name make a difference with new?
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Let's get pedantic, because there are differences that can actually affect your code's behavior. Much of the following is taken from comments made to an "Old New Thing" article.
Sometimes the memory returned by the new operator will be initialized, and sometimes it won't depending on wh...
How do I make XAML DataGridColumns fill the entire DataGrid?
...Width="*" the column will fill to expand the available space.
If you want all columns to divide the grid equally apply this to all columns. If you just want one to fill the remaining space just apply it to that column with the rest being "Auto" or a specific width.
You can also use Width="0.25*" (...
Android 4.3 Bluetooth Low Energy unstable
...ect and create a fresh instance of gatt on each connect.
Don't forget to call android.bluetooth.BluetoothGatt#close()
Start a new thread inside onLeScan(..) and then connect. Reason: BluetoothDevice#connectGatt(Context context, boolean autoConnect, BluetoothGattCallback callback) always fails, if ...
What port is a given program using? [closed]
...his, and I don't know what security implications there are on Vista.
I usually add -n as well to make it a little faster, but adding -b can make it quite slow.
Edit: If you need more functionality than netstat provides, vasac suggests that you try TCPView.
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round() for float in C++
... but there are others such as round-to-even, which is less biased and generally better if you're going to do a lot of rounding; it's a bit more complex to implement though.
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What is the purpose of the var keyword and when should I use it (or omit it)?
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Is "not really much difference" == "No Difference"?
– Alex
Sep 24 '09 at 8:56
65
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When and why I should use session_regenerate_id()?
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And what appends if the hacker do the 20th call ? Session ID is changed and he is the only one to own the session ;))
– fred727
Oct 6 '15 at 10:59
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How to get the jQuery $.ajax error response text?
...n reality jquery while creating a JSONP request won't create XHR object at all. JSON-Padding is just that dynamic script references are added pointing to the URL and the json data will be wrapped with a method which gets invoked. So XHR is not used at all.
– NLV
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Running a cron job on Linux every six hours
..., since cron runs with an extensively cut-down environment. You won't have all the environment variables you have in your interactive shell session.
It's a good idea to specify an absolute path to your script/binary, or define PATH in the crontab itself. To help debug any issues I would also redire...