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String vs. StringBuilder

I understand the difference between String and StringBuilder ( StringBuilder being mutable) but is there a large performance difference between the two? ...
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jQuery: Check if div with certain class name exists

Using jQuery I'm programmatically generating a bunch of div 's like this: 18 Answers ...
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Javascript / Chrome - How to copy an object from the webkit inspector as code

I am doing a console.log statement in my javascript in order to log a javascript object. I'm wondering if there's a way, once that's done - to copy that object as javascript code. What I'm trying to do is convert an object that was created using ajax to parse an xml feed into a static javascript obj...
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What is event bubbling and capturing?

What is the difference between event bubbling and capturing? When should one use bubbling vs capturing? 6 Answers ...
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Iteration over std::vector: unsigned vs signed index variable

What is the correct way of iterating over a vector in C++? 17 Answers 17 ...
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Backbone.js: get current route

Using Backbone, is it possible for me to get the name of the current route? I know how to bind to route change events, but I'd like to be able to determine the current route at other times, in between changes. ...
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open() in Python does not create a file if it doesn't exist

What is the best way to open a file as read/write if it exists, or if it does not, then create it and open it as read/write? From what I read, file = open('myfile.dat', 'rw') should do this, right? ...
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Compare two objects' properties to find differences?

I have two objects of the same type, and I want to loop through the public properties on each of them and alert the user about which properties don't match. ...
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Why not be dependently typed?

I have seen several sources echo the opinion that "Haskell is gradually becoming a dependently-typed language". The implication seems to be that with more and more language extensions, Haskell is drifting in that general direction, but isn't there yet. ...
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Using switch statement with a range of value in each case?

In Java, is it possible to write a switch statement where each case contains more than one value? For example (though clearly the following code won't work): ...