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What is a elegant way in Ruby to tell if a variable is a Hash or an Array?
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Be careful, this could really screw you if someone ends up passing you an instance of ActiveSupport::HashWithIndifferentAccess. Which responds like a hash, but is not in fact a Hash. :(
– unflores
Mar 6 '14 at...
Which is more efficient: Multiple MySQL tables or one large table?
I store various user details in my MySQL database. Originally it was set up in various tables meaning data is linked with UserIds and outputting via sometimes complicated calls to display and manipulate the data as required. Setting up a new system, it almost makes sense to combine all of these tabl...
How can I tell if a library was compiled with -g?
...sing a C like syntax. If neither of these formats are found this option falls back on the -W option to print any DWARF information in the file."
– Matt McClellan
Jan 5 '10 at 17:13
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Can a recursive function be inline?
...torial(x3 - 1);
}
}
}
}
In this case, we've basically inlined the function 3 times. Some compilers do perform this optimization. I recall MSVC++ having a setting to tune the level of inlining that would be performed on recursive functions (up to 20, I believe).
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Case-insensitive search in Rails model
...Aug 13 '15 at 20:41
Andrew Marshall
87.3k1818 gold badges202202 silver badges204204 bronze badges
answered Feb 8 '10 at 9:35
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if (key in object) or if(object.hasOwnProperty(key)
...type
If we want to check that some property exist on the prototype, logically, we would say:
console.log(('name' in o) && !o.hasOwnProperty('name')); //false
console.log(('gender' in o) && !o.hasOwnProperty('gender')); //true - it's in prototype
Finally:
So, regarding to statem...
ng-repeat :filter by single field
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@Seglespaan, not really. You might find that the method presented by bmleite and blesh read nicer, since you can see that you are filtering by color. This method is more compact, which might be useful if you want to search by multiple propert...
AWS S3: The bucket you are attempting to access must be addressed using the specified endpoint
...ting to access must be addressed using the specified endpoint. Please send all future requests to this endpoint."
US Standard is us-east-1
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On logout, clear Activity history stack, preventing “back” button from opening logged-in-only Activi
All activities in my application require a user to be logged-in to view. Users can log out from almost any activity. This is a requirement of the application. At any point if the user logs-out, I want to send the user to the Login Activity . At this point I want this activity to be at the bottom of...
How do I fix "The expression of type List needs unchecked conversion…'?
...);
for(Object o: c)
r.add(clazz.cast(o));
return r;
}
This allows you to do:
List<SyndEntry> entries = castList(SyndEntry.class, sf.getEntries());
Because this solution checks that the elements indeed have the correct element type by means of a cast, it is safe, and does not...