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Does Java casting introduce overhead? Why?

Is there any overhead when we cast objects of one type to another? Or the compiler just resolves everything and there is no cost at run time? ...
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Who is “us” and who is “them” according to Git?

After a Git rebase, and in other circumstances, you can find some files marked as deleted by us in the git status report. Who is us according to Git and why? ...
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What is the purpose of the EBP frame pointer register?

I'm a beginner in assembly language and have noticed that the x86 code emitted by compilers usually keeps the frame pointer around even in release/optimized mode when it could use the EBP register for something else. ...
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How can I use different certificates on specific connections?

A module I'm adding to our large Java application has to converse with another company's SSL-secured website. The problem is that the site uses a self-signed certificate. I have a copy of the certificate to verify that I'm not encountering a man-in-the-middle attack, and I need to incorporate this...
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What are the best practices for JavaScript error handling?

I'm looking to start making my JavaScript a bit more error proof, and I'm finding plenty of documentation on using try , catch , finally , and throw , but I'm not finding a ton of advice from experts on when and where to throw errors. ...
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Match multiline text using regular expression

I am trying to match a multi line text using java. When I use the Pattern class with the Pattern.MULTILINE modifier, I am able to match, but I am not able to do so with (?m). ...
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System.Threading.Timer in C# it seems to be not working. It runs very fast every 3 second

I've a timer object. I want it to be run every minute. Specifically, it should run a OnCallBack method and gets inactive while a OnCallBack method is running. Once a OnCallBack method finishes, it (a OnCallBack ) restarts a timer. ...
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Differences between git remote update and fetch?

Is git remote update the equivalent of git fetch ? 2 Answers 2 ...
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How do I define and use an ENUM in Objective-C?

I declared an enum in my implementation file as shown below, and declared a variable of that type in my interface as PlayerState thePlayerState; and used the variable in my methods. But I am getting errors stating that it is undeclared. How do I correctly declare and use a variable of type PlayerSta...
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When to use the brace-enclosed initializer?

In C++11, we have that new syntax for initializing classes which gives us a big number of possibilities how to initialize variables. ...