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Catch-22 prevents streamed TCP WCF service securable by WIF; ruining my Christmas, mental health
...sual hash function and xml signature required by ws-security. If it has to read the entire stream to sign the single message (which is not really a message, but it's a single continuous stream) then you can see the problem here. WCF will have to stream it once "locally" to compute the message securi...
Can someone explain the traverse function in Haskell?
...ional fmap, because inside the function you need to access the database to read the usernames (which requires an effect -- in this case, using the IO monad).
The signature of traverse is:
traverse :: (Traversable t, Applicative f) => (a -> f b) -> t a -> f (t b)
With traverse, you ca...
What does yield mean in PHP?
...ou get a parse error from that code, update your PHP.
Sources and further reading:
Official docs
The original RFC
kelunik's blog: An introduction to generators
ircmaxell's blog: What generators can do for you
NikiC's blog: Cooperative multitasking using coroutines in PHP
Co-operative PHP Multitas...
How to create an installer for a .net Windows Service using Visual Studio
... in Microsoft and came up with a inferior solution to a problem that had already been solved. See blog.iswix.com/2006/07/msi-vs-net.html for more information.
– Christopher Painter
Jan 27 '12 at 11:51
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What makes Scala's operator overloading “good”, but C++'s “bad”?
...d so an attempt to map this DSL into C++ would require some symbols that already evoke very different concepts.
Of course, this also opens up Scala to another kind of abuse. In Scala you can name a method $!&^% if you want to.
For other languages that, like Scala, are flexible in the use o...
Python class inherits object
...ment) I am not 101% sure about this point (wether all builtin types were already converted to new-style classes when new-style classes were introduced) - I might just be plain wrong, or this might only have concerned some of the standard lib's (but not builtin) types. But yet I think it should be be...
Generating random integer from a range
... of rand(). For a comprehensive test of the quality of this method, please read this.
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Increasing the maximum number of TCP/IP connections in Linux
...ou do both, you should see over 1500 outbound connections per second, more readily.
To change the values:
sysctl net.ipv4.ip_local_port_range="15000 61000"
sysctl net.ipv4.tcp_fin_timeout=30
The above should not be interpreted as the factors impacting system capability for making outbound connec...
The apk must be signed with the same certificates as the previous version
...
Nothing. Read the documentation: Publishing Updates on Android Market
Before uploading the updated application, be sure that you have incremented the android:versionCode and android:versionName attributes in the element of the ma...
When can I use a forward declaration?
... Thank you! That edit adds a tonne of valuable info. I'll have to read it several times to fully understand it... or maybe use the often-better tactic of waiting until I get horribly confused in real code and coming back here! I suspect I'll be able to use this to reduce dependencies in var...