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Who architected / designed C++'s IOStreams, and would it still be considered well-designed by today'
...dmit; I remember it being the subject of intense debate some years ago, on comp.lang.c++.moderated.
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rails - Devise - Handling - devise_error_messages
...e this out myself. I just found this issue logged on Github https://github.com/plataformatec/devise/issues/issue/504/#comment_574788
Jose is saying that devise_error_messsages! method is just a stub (though it contains implementation) and that we're supposed to override/replace it. It would have be...
PHP: exceptions vs errors?
...;-- actually, this isn't really true. E_ERROR and E_PARSE are the two most common unrecoverable errors (there are a couple of others) but the vast majority of errors you'll see in dev are recoverable (E_NOTICE, E_WARNING et al). Unfortunately PHP's error handling is a complete mess - all kinds of th...
How can I change my Cygwin home folder after installation?
...
Starting with Cygwin 1.7.34, the recommended way to do this is to add a custom db_home setting to /etc/nsswitch.conf. A common wish when doing this is to make your Cygwin home directory equal to your Windows user profile directory. This setting will do that:
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Benefits of EBS vs. instance-store (and vice-versa) [closed]
...cordingly. While EBS-backed instances provide certain level of durability compared to ephemeral storage instances, they can and do fail. Have an AMI from which you can launch new instances as needed in any availability zone, back up your important data (e.g. databases), and if your budget allows i...
Draw a perfect circle from user's touch
...erant of partial data, imperfect data and noise. Using Hough for a circle:
http://en.wikipedia.org/wiki/Hough_transform#Circle_detection_process
Given that your circle is hand drawn I think the Hough transform may be a good match for you.
Here's a "simplified" explanation, I apologize for it not r...
Does “git fetch --tags” include “git fetch”?
... git fetch --tags fetches tags in addition to what are fetched by the same command line without the option.
See commit c5a84e9 by Michael Haggerty (mhagger):
Previously, fetch's "--tags" option was considered equivalent to specifying the refspec
refs/tags/*:refs/tags/*
on the command ...
What is the difference between a weak reference and an unowned reference?
... provide this benefit).
A weak reference allows the possibility of it to become nil (this happens automatically when the referenced object is deallocated), therefore the type of your property must be optional - so you, as a programmer, are obligated to check it before you use it (basically the compi...
Why is Go so slow (compared to Java)?
As we could see from The Computer Language Benchmarks Game in 2010:
10 Answers
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What happens to a declared, uninitialized variable in C? Does it have a value?
...in undefined behavior.
void foo() {
int x;
printf("%d", x); // the compiler is free to crash here
}
In practice, they tend to just have some nonsensical value in there initially - some compilers may even put in specific, fixed values to make it obvious when looking in a debugger - but stric...