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How can I override the OnBeforeUnload dialog and replace it with my own?
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Just FYI anyone reading this^ Chrome is deprecating synchronous AJAX calls in unbeforeunload
– morganwebdev
Apr 22 '19 at 21:09
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How to generate all permutations of a list?
...know this post is old but I'm writing this for the benefit of everyone who reads it now. Also now, the best way would be to use itertools.permutations() as pointed out by many.
– Jagtesh Chadha
May 2 '11 at 12:40
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Spring Expression Language (SpEL) with @Value: dollar vs. hash ($ vs. #)
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Try reading this article, which suggests
"If the hash is used, your code is recomputed every time that element is included in a partial refresh (i.e. each time it is rendered). If you use a dollar, your code is only computed whe...
Should I use an exception specifier in C++?
... );
might evolve into
virtual void open() throw( FileNotFound, SocketNotReady, InterprocessObjectNotImplemented, HardwareUnresponsive );
You could really write that as
throw( ... )
The first is not extensible, the second is overambitious and the third is really what you mean, when you write ...
Counting the occurrences / frequency of array elements
... the reduce answer. I was about to submit such an answer before I saw it already existed. Nevertheless the counts[num] = counts[num] ? counts[num]+1 : 1 answer also works (equivalent to the if(!result[a[i]])result[a[i]]=0 answer, which is more elegant but less easy to read); this answers can be modi...
What is the difference between async.waterfall and async.series
... Is it possible for either of these two functions to return a value? I've read that it's possible, but I can't find relevant information anywhere in the documentation.
– Anderson Green
Sep 23 '12 at 16:30
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Mechanisms for tracking DB schema changes [closed]
...sqldump].
Create bookkeeping table (called _meta) if it doesn't exist.
Read current VERSION from _meta table. Assume 0 if not found.
For all .sql files numbered higher than VERSION, execute them in order
If one of the files produced an error: roll back to the backup
Otherwise, update the v...
Android: Background Image Size (in Pixel) which Support All Devices
... in all devices. For understanding multiple supporting screens you have to read
http://developer.android.com/guide/practices/screens_support.html
xxxhdpi: 1280x1920 px
xxhdpi: 960x1600 px
xhdpi: 640x960 px
hdpi: 480x800 px
mdpi: 320x480 px
ldpi: 240x320 px
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How can I split a string with a string delimiter? [duplicate]
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Read C# Split String Examples - Dot Net Pearls and the solution can be something like:
var results = yourString.Split(new string[] { "is Marco and" }, StringSplitOptions.None);
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Feedback on using Google App Engine? [closed]
...ng them same entity group may not be best for frequent update purposes....
read this http://blog.notdot.net/2009/9/Distributed-Transactions-on-App-Engine
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