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Is it expensive to use try-catch blocks even if an exception is never thrown?

We know that it is expensive to catch exceptions. But, is it also expensive to use a try-catch block in Java even if an exception is never thrown? ...
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How to replace a character with a newline in Emacs?

I am trying to replace a character - say ; - with a new line using replace-string and/or replace-regexp in Emacs. 6 A...
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How to get div height to auto-adjust to background size?

How do I get a div to automatically adjust to the size of the background I set for it without setting a specific height (or min-height) for it? ...
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How to add edge labels in Graphviz?

I am trying to draw a graph using Graphviz, but I need to add labels on the edges. There does not seem to be any way to that in Graphviz. Are there a way out? ...
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Convert any object to a byte[]

I am writing a prototype TCP connection and I am having some trouble homogenizing the data to be sent. 13 Answers ...
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How can I get name of element with jQuery?

How can I get name property of HTML element with jQuery? 6 Answers 6 ...
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What does a tilde do when it precedes an expression?

I saw it in an answer, and I've never seen it before. 5 Answers 5 ...
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How do I wrap link_to around some html ruby code?

How do I wrap a link around view code? I can't figure out how to pass multiple lines with ruby code to a single link_to method. The result I am looking for is that you click the column and get the show page: ...
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How to add calendar events in Android?

I'm just getting up to speed on Android, and today in a project meeting someone said that Android has no native calendar app so users just use whatever calendar app they like. ...
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Why use double indirection? or Why use pointers to pointers?

When should a double indirection be used in C? Can anyone explain with a example? 18 Answers ...