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Where does the “flatmap that s***” idiomatic expression in Scala come from?
...operation shared by, for example, containers (such as Option, collections, etc), continuations, state, etc. Second, while you can de-construct an Option, that, as opposed to flatMap, is not a monadic operation, so it cannot be as widely applied. Also, it requires too much knowledge about the data yo...
How do I check for a network connection?
... continue;
// this allow to filter modems, serial, etc.
// I use 10000000 as a minimum speed for most cases
if (ni.Speed < minimumSpeed)
continue;
// discard virtual cards (virtual box, virtual pc, etc.)
if (...
Using git repository as a database backend
... terms of normal ORMs, such as ActiveRecord, Hibernate, DataMapper, Tower, etc.
As much as I've searched for, there's zero existing free codebase for doing that approach to git from popular frameworks.
There is at least one service that somehow manages to do that efficiently — that is obviously gi...
Android Log.v(), Log.d(), Log.i(), Log.w(), Log.e() - When to use each one?
...ine what is considered a debug log versus informational, versus and error, etc. etc.
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Why do we need the “event” keyword while defining events?
...yone can remove other people's event handlers, raise the event themselves, etc - it's an encapsulation disaster.
For more on events (and delegates) read my article on this topic. (At some point I need to update this for C# 4, which changes field-like events very slightly. The gist of it is still co...
Python assigning multiple variables to same value? list behavior
...
If you're coming to Python from a language in the C/Java/etc. family, it may help you to stop thinking about a as a "variable", and start thinking of it as a "name".
a, b, and c aren't different variables with equal values; they're different names for the same identical value. Var...
Differences between .NET 4.0 and .NET 4.5 in High level in .NET
...dividual Applications in a Single Worker Process
Multi-Targeting
etc
And for Asp.net 4.5 there is also a long list of improvements:
Asynchronously Reading and Writing HTTP Requests and Responses
Improvements to HttpRequest handling
Asynchronously flushing a response
Su...
Why does the order in which libraries are linked sometimes cause errors in GCC?
... libraries
$ export LD_LIBRARY_PATH=. # not needed if libs go to /usr/lib etc
$ g++ -fpic -shared d.cpp -o libd.so
$ g++ -fpic -shared b.cpp -L. -ld -o libb.so # specifies its dependency!
$ g++ -L. -lb a.cpp # wrong order (works on some distributions)
$ g++ -Wl,--as-needed -L. -lb a.cpp # wrong or...
Importing CSV with line breaks in Excel 2007
...s is a free-text field, which may contain line breaks, commas, quotations, etc. In order to counteract this, I have wrapped the field in double quotes (").
...
How do I combine a background-image and CSS3 gradient on the same element?
...arget{ background-image: url("IMAGE_URL"); }
Background position, sizing etc.
Other properties that would apply to a single image may also be comma separated. If only 1 value is supplied, that will be applied to all stacked images including the gradient. background-size: 40px; will constrain both...