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Difference between declaring variables before or in loop?
I have always wondered if, in general, declaring a throw-away variable before a loop, as opposed to repeatedly inside the loop, makes any (performance) difference?
A (quite pointless) example in Java:
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Unnamed/anonymous namespaces vs. static functions
A feature of C++ is the ability to create unnamed (anonymous) namespaces, like so:
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When should I use uuid.uuid1() vs. uuid.uuid4() in python?
I understand the differences between the two from the docs.
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How can I add some small utility functions to my AngularJS application?
I would like to add some utility functions to my AngularJS application. For example:
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Linux: compute a single hash for a given folder & contents?
Surely there must be a way to do this easily!
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Equivalent of “throw” in R
How does one "throw" an error in R? I have a function that takes a data frame and some column names and does stuff with them. If the columns don't exist, I want the function to stop and to stop all functions depending on it.
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valueOf() vs. toString() in Javascript
In Javascript every object has a valueOf() and toString() method. I would have thought that the toString() method got invoked whenever a string conversion is called for, but apparently it is trumped by valueOf().
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Is 'switch' faster than 'if'?
Is a switch statement actually faster than an if statement?
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How can I pass a Bitmap object from one activity to another
In my activity, I create a Bitmap object and then I need to launch another Activity ,
How can I pass this Bitmap object from the sub-activity (the one which is going to be launched)?
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How to select html nodes by ID with jquery when the id contains a dot?
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