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MongoDB or CouchDB - fit for production? [closed]
...se for 1.0. This means we'll be maintaining compatibility with the current API for 1.0, so now is a good time to take another look at CouchDB if you haven't in a while.
The CouchDB 0.11 source code release is available here. There are binary installers and other goodies linked here.
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When should TaskCompletionSource be used?
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I mostly use it when only an event based API is available (for example Windows Phone 8 sockets):
public Task<Args> SomeApiWrapper()
{
TaskCompletionSource<Args> tcs = new TaskCompletionSource<Args>();
var obj = new SomeApi();
// wil...
How do I use Java to read from a file that is actively being written to?
...a channel for locking a part of a file.
http://java.sun.com/javase/6/docs/api/java/nio/channels/FileChannel.html
This function of the FileChannel might be a start
lock(long position, long size, boolean shared)
An invocation of this method will block until the region can be locked
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S3 - Access-Control-Allow-Origin Header
...wer) or go straight ahead to this one: docs.aws.amazon.com/AmazonS3/latest/API/RESTBucketPUTcors.html
– Flavio Wuensche
Feb 17 '14 at 22:00
7
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Postgres unique constraint vs index
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Because indexes do not have an API for deferring, only constraints do, so while the deferral machinery exists under the cover to support unique constraints, there's no way to declare an index as deferrable, or to defer it.
– Masklinn
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Getting the parent div of element
...es parentNode in some cases.
https://developer.mozilla.org/en-US/docs/Web/API/Node/parentElement
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JSON serialization of Google App Engine models
...encoder as in the following python:
import datetime
from google.appengine.api import users
from google.appengine.ext import db
from django.utils import simplejson
class jsonEncoder(simplejson.JSONEncoder):
def default(self, obj):
if isinstance(obj, datetime.datetime):
retur...
When to use -retainCount?
...e could be a perfectly valid result of passing an object through the UIKit API, for example.
– bbum
Jan 9 '11 at 0:25
2
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Android: When should I use a Handler() and when should I use a Thread?
... create a thread pool unless you use ThreadPoolExecutor or ExecutorService API.
(Taken this query from your comments on Blackbelt answer)
Why not use an Executor? and even if I did want to use a Handler to do that, how?
Reference : Thread Performance article
Ther
Converting from longitude\latitude to Cartesian coordinates
...latlong +datum=WGS84 +to +proj=geocent +datum=WGS84
It also provides a C API. In particular, the function pj_geodetic_to_geocentric will do the conversion without having to set up a projection object first.
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