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Why return NotImplemented instead of raising NotImplementedError
...oesn't, then the runtime will fall back to the built-in behavior (which is based on identity for == and !=)."
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How can I get the list of files in a directory using C or C++?
...le and does most of the simple stuff you need without using a big template-based approach like boost(no offence, I like boost!).
The author of the windows compatibility layer is Toni Ronkko. In Unix, it is a standard header.
UPDATE 2017:
In C++17 there is now an official way to list files of your...
How to check if an object is nullable?
... boxed Nullable<T> but because I was writing a generic WPF converter base class and some properties are nullable, so I used Nullable.GetUnderlyingType to detect that case and Activator.CreateInstance to make a boxed nullable, (Convert.ChangeType doesn't handle nullables btw).
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Approximate cost to access various caches and main memory?
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Surely these care very HUGE amounts, based on processor design, ram latency/frequency, hard disk caching(both type and size)/rpm etc etc? To Quote INTEL (for values they released for one specific CPU):"NOTE:These values are rough approximations. They depend on C...
Understanding the difference between Object.create() and new SomeFunction()
.... :) But SmallTalk certainly followed it. … And OOP does not equal class-based OOP.. JS is prototype-based OOP, but they all have OOP in common. In fact JS’s OOP philosophy is much cleaner, more elegant and more universal than the class-based approach. They just failed to implement it nicely too...
Rails ActionMailer - format sender and recipient name/email address
...ommended in headers as well. I found that RFC2047 provides a mechanism for base64 encoding such values.
– William Denniss
Dec 6 '11 at 23:51
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How To Create a Flexible Plug-In Architecture?
...- configuration files (XML, .conf, and so on), inheritance frameworks, database information, libraries, and others. In my experience:
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Order data frame rows according to vector with specific order
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not sure it is the cleanest way, but with only "base" functions, this should work if you have duplicates in df: df <- data.frame(name=letters[c(1:4, 1:4)], value=c(rep(TRUE, 2), rep(FALSE, 2),rep(TRUE, 2), rep(FALSE, 2) )) target <- c("b", "c", "a", "d") df[order...
Single Sign On across multiple domains [closed]
...the script client_login.php
All the domains have a shared user session database.
When the client domain requires the user to be logged in, it redirects to the master domain (login.mydomain.com/master_login.php). If the user has not signed in to the master it requests authentication from the user (ie...
How does MongoDB sort records when no sort order is specified?
...n a Mongo find() query without any sort order specified, what does the database internally use to sort the results?
2 Answe...