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How to add facebook share button on my website?

... You don't need all that code. All you need are the following lines: <a href="https://www.facebook.com/sharer/sharer.php?u=example.org" target="_blank"> Share on Facebook </a> Documentation can be found at https://developers...
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When to add what indexes in a table in Rails

... Should I add "index" to all the foreign keys like "xxx_id"? It would be better, because it accelerates the search in sorting in this column. And Foreign keys are something searched for a lot. Since Version 5 of rails the index will be created aut...
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What is a good Hash Function?

... For doing "normal" hash table lookups on basically any kind of data - this one by Paul Hsieh is the best I've ever used. http://www.azillionmonkeys.com/qed/hash.html If you care about cryptographically secure or anything else more advanced, then YMMV. If you just want...
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How to get maximum value from the Collection (for example ArrayList)?

...f the given collection, according to the natural ordering of its elements. All elements in the collection must implement the Comparable interface. share | improve this answer | ...
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Should I use char** argv or char* argv[]?

... As you are just learning C, I recommend you to really try to understand the differences between arrays and pointers first instead of the common things. In the area of parameters and arrays, there are a few confusing rules that should be clear before going on. First, what ...
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Verify a certificate chain using openssl verify

...ing the first part of the post Greg references (the second part is specifically about pyOpenSSL and not relevant to this question). In case the post goes away I'll quote the important paragraphs: Unfortunately, an "intermediate" cert that is actually a root / self-signed will be treated as a ...
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Error:(1, 0) Plugin with id 'com.android.application' not found

This is my first attempt at Android Studio. I installed 0.8.0 and updated to 0.8.2. As soon as a project is created I get the error message: ...
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Implementing INotifyPropertyChanged - does a better way exist?

...er with C# 5: protected bool SetField<T>(ref T field, T value, [CallerMemberName] string propertyName = null) {...} which can be called like this: set { SetField(ref name, value); } with which the compiler will add the "Name" automatically. C# 6.0 makes the implementation easier: protec...
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Setting PayPal return URL and making it auto return?

... if they don't have Auto Return enabled there, the buyer would need to manually click past the end of checkout in order to be redirected to that URL, rather than being redirected automatically. – SubGothius Aug 11 '16 at 20:58 ...
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is it possible to change values of the array when doing foreach in javascript?

... The callback is passed the element, the index, and the array itself. arr.forEach(function(part, index, theArray) { theArray[index] = "hello world"; }); edit — as noted in a comment, the .forEach() function can take a second...