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Ruby custom error classes: inheritance of the message attribute

...method, exceptions are agreeing to be used where Strings are expected. http://ruby-doc.org/core-1.9.3/Exception.html#method-i-message I would opt for redefining to_s/to_str or the initializer. Here is an example where we want to know, in a mostly human readable way, when an external service ha...
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When should we use mutex and when should we use semaphore

...l /* Task 2 - Consumer */ sema_wait(&sem); // Wait for signal See http://www.netrino.com/node/202 for further explanations share | improve this answer | follow ...
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What's Pros and Cons: putting javascript in head and putting just before the body close

...e problem caused by scripts is that they block parallel downloads. The HTTP/1.1 specification suggests that browsers download no more than two components in parallel per hostname. If you serve your images from multiple hostnames, you can get more than two downloads to occur in parallel...
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Why Large Object Heap and why do we care?

...rate heap on which it runs GC on a different schedule to the regular heap. http://msdn.microsoft.com/en-us/magazine/cc534993.aspx share | improve this answer | follow ...
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What is the maximum amount of RAM an app can use?

...mory limits per app are here depending on screen size and Android version: https://drive.google.com/file/d/0B7Vx1OvzrLa3Y0R0X1BZbUpicGc/view?usp=sharing Source: Android Compatibility Downloads http://source.android.com/compatibility/downloads.html; Compatibility Definition Document (CDD), Section ...
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Is ASCII code 7-bit or 8-bit?

... the paper "The Evolution of Character Codes, 1874-1968" (samizdat copy at http://falsedoor.com/doc/ascii_evolution-of-character-codes.pdf) and then chase its references (many of which are not available online and may be hard to find even with access to a university library, I regret to say). ...
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How to prove that a problem is NP complete?

... to it in polynomial time which makes the problem NP-Hard. See the end of http://www.ics.uci.edu/~eppstein/161/960312.html for more. share | improve this answer | follow ...
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CMake output/build directory

...o user where to compile. Instead of that use one of predefined variables: http://www.cmake.org/Wiki/CMake_Useful_Variables (look for CMAKE_BINARY_DIR and CMAKE_CURRENT_BINARY_DIR) share | improve t...
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All permutations of a Windows license key

... http://www.magicaljellybean.com/keyfinder/ The Magical Jelly Bean Keyfinder is a freeware utility that retrieves your Product Key (cd key) used to install windows from your registry. It also has a community-updated config...
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Best practices for exception management in Java or C# [closed]

...nt error codes instead of exceptions... I always thought it was weird that HTTP still uses error codes, even though my application is generating an exception. Why can't HTTP let me pass the exception through as-is? – Trejkaz Aug 24 '12 at 4:26 ...