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How to create Android Facebook Key Hash?
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This works, if you call pContext.getPackageInfo. Or just remove it from a function and call it in onCreate of any activity.
– Dpedrinha
Mar 24 '16 at 18:35
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Unable to Cast from Parent Class to Child Class
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Well, I would hesitate to call this a "downcast".
– Kirk Woll
Dec 24 '12 at 4:43
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How to create a directory if it doesn't exist using Node.js?
...erable to race conditions: another process may remove the file between the calls to fs.exists() and fs.open(). Just open the file and handle the error when it's not there.
Since we're talking about a directory rather than a file, this advice implies you should just unconditionally call mkdir and ig...
How do I rename the android package name? [duplicate]
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Worked for me (using Android Studio 0..9.1) but in reverse order. First moved the R.java class to the new package. Second step was to delete duplicate R.java (it appeared in source folder in the new package). And lastly, manually changed the package n...
How do I calculate percentiles with python/numpy?
...does percentile know what to use for N? It isn't specified in the function call.
– Richard
Oct 31 '13 at 9:54
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Difference between Statement and PreparedStatement
...sage.
Binary communications protocol means less bandwidth and faster comms calls to DB server
Prepared statements are normally executed through a non-SQL binary protocol. This means that there is less data in the packets, so communications to the server is faster. As a rule of thumb network opera...
The specified named connection is either not found in the configuration, not intended to be used wit
... string from the EF project's app.config to your website's web.config. Basically, any connection string data should exist in the config file of the project that the .Net threads initiated from by CLR (i.e. your startup project).
If this is not your case, then just open your edmx file, right click on...
What is the difference between re.search and re.match?
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Well, that's goofy. Why call it match? Is it a clever maneuver to seed the API's with unintuitive names to force me to read the documentation? I still won't do it! Rebel!
– Sammaron
Sep 16 '16 at 15:14
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Difference between ObservableCollection and BindingList
... there are more, which also worth mentioning:
Performance
When AddNew is called, BindingList<T> searches for the added item by an IndexOf lookup. And if T implements INotifyPropertyChanged the index of a changed element is also searched by IndexOf (though there is no new lookup as long as th...
What's the use of ob_start() in php?
...ob_get_contents();
ob_end_clean();
There are two other functions you typically pair it with: ob_get_contents(), which basically gives you whatever has been "saved" to the buffer since it was turned on with ob_start(), and then ob_end_clean() or ob_flush(), which either stops saving things and disc...