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What is the purpose of the reader monad?
...perations is it equipped with? What is it good for?
How is the monad implemented? From where does it arise?
From the first approach, the reader monad is some abstract type
data Reader env a
such that
-- Reader is a monad
instance Monad (Reader env)
-- and we have a function to get its envir...
How does JavaScript .prototype work?
...ototype of that object."
If you access a property via the dot (obj.propName) or bracket (obj['propName']) notation, and the object does not directly have such a property (ie. an own property, checkable via obj.hasOwnProperty('propName')), the runtime looks for a property with that name on the obje...
Do HttpClient and HttpClientHandler have to be disposed between requests?
...em.Net.Http.HttpClient and System.Net.Http.HttpClientHandler in .NET Framework 4.5 implement IDisposable (via System.Net.Http.HttpMessageInvoker ).
...
Usage of __slots__?
...ave, with the expected results:
faster attribute access.
space savings in memory.
The space savings is from
Storing value references in slots instead of __dict__.
Denying __dict__ and __weakref__ creation if parent classes deny them and you declare __slots__.
Quick Caveats
Small caveat, you shou...
Memcached vs. Redis? [closed]
... a Ruby web-app with Redis server for caching. Is there a point to test Memcached instead?
17 Answers
...
Best way to work with dates in Android SQLite [closed]
I'm having some trouble working with dates on my Android application that uses SQLite.
I have a couple questions:
9 Answers...
Append an object to a list in R in amortized constant time, O(1)?
If I have some R list mylist , you can append an item obj to it like so:
17 Answers
...
Schema for a multilanguage database
...8, 2))
CREATE TABLE T_PRODUCT_tr (pr_id INT FK, languagecode varchar, pr_name text, pr_descr text)
This way if you have multiple translatable column it would only require a single join to get it + since you are not autogenerating a translationid it may be easier to import items together with their ...
Why would I want stage before committing in Git?
...aller, self-contained pieces. Perhaps you fixed a bug while you were implementing a feature. You can git add just that file (or git add -p to add just part of a file!) and then commit that bugfix before committing everything else. If you are using git commit -a then you are just forcing an add of...
What does do?
... X-UA-Compatible tag. If you need to support IE9 or IE8, then I would recommend using the tag. If you only support the latest browsers (IE11 and/or Edge) then I would consider dropping this tag altogether. If you use Twitter Bootstrap and need to eliminate validation warnings, this tag must appear i...