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How to play with Control.Monad.Writer in haskell?
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Erlang's 99.9999999% (nine nines) reliability
...r over 20 years. It represents the total time over those 20 years that the service provided by the AXD301 system was ever offline. Subtle difference. As Joe Armstrong says here:
The AXD301 has achieved a NINE nines reliability (yes, you read that right, 99.9999999%). Let’s put this in context: 5 ...
AngularJS $http, CORS and http authentication
...: You want to send POST request to a different domain with AngularJS $http service. There are several tricky things to be aware of when getting AngularJS and the server setup.
...
Is there a use-case for singletons with database access in PHP?
...re, no support nothing).
- People who need to work with third-party APIs, services and websites.
If you look closer, this is not too different than the earlier case - third-party APIs, services, websites, are just like external, isolated codebases over which you have NO control. Anything can happ...
Dictionary vs Object - which is more efficient and why?
...ots__ = ('i', 'l')
def __init__(self, i):
self.i = i
self.l = []
all = {}
for i in range(1000000):
all[i] = Obj(i)
test_obj.py:
class Obj(object):
def __init__(self, i):
self.i = i
self.l = []
all = {}
for i in range(1000000):
all[i] = Obj(i)
test_dict.py:
all = {}
for i in...
Show pop-ups the most elegant way
...arJS modals so far I believe that the most elegant approach is a dedicated service to which we can provide a partial (HTML) template to be displayed in a modal.
When we think about it modals are kind of AngularJS routes but just displayed in modal popup.
The AngularUI bootstrap project (http://an...
Why all the Active Record hate? [closed]
...n" objects that are accessed by your controllers via these DataMapper (or "service layer") classes. These do not directly mirror the database, but act as your OO representation for some real-world object. Say you have a User class in your domain, and need to have references to, or collections of oth...
What makes a keychain item unique (in iOS)?
...ssword, the primary key is the combination of
kSecAttrAccount and kSecAttrService.
For a keychain item of class kSecClassInternetPassword, the primary key is the combination of kSecAttrAccount, kSecAttrSecurityDomain, kSecAttrServer, kSecAttrProtocol, kSecAttrAuthenticationType, kSecAttrPort and kS...
Explaining Apache ZooKeeper
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How it works
You may describe ZooKeeper as a replicated synchronization service with eventual consistency. It is robust, since the persisted data is distributed between multiple nodes (this set of nodes is called an "ensemble") and one client connects to any of them (i.e., a specific "server"), m...
versionCode vs versionName in Android Manifest
... to the user (see android:versionName, below). Applications and publishing services should not display this version value to users.
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