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What does .SD stand for in data.table in R
...al-world feel, rather than making up data, let's load some data sets about baseball from Lahman:
library(data.table)
library(magrittr) # some piping can be beautiful
library(Lahman)
Teams = as.data.table(Teams)
# *I'm selectively suppressing the printed output of tables here*
Teams
Pitching = as.d...
How to copy an object in Objective-C
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Well, zones are effectively unused in modern OS X based runtimes (i.e. I think they're literally never used). But yes, you could call allocWithZone.
– Adam Wright
Aug 12 '11 at 22:04
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Shall we always use [unowned self] inside closure in Swift
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This is great. what if I have an animation that is based on user interaction, but takes a while to finish. And then user moves to another viewController. I guess in that case I should still be using weak rather than unowned right?
– Honey
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Memcached vs. Redis? [closed]
... useful as a cache. Both can help speed up your application by caching database results, HTML fragments, or anything else that might be expensive to generate.
Points to Consider
When used for the same thing, here is how they compare using the original question's "Points to Consider":
Read/write spe...
How to sort an IEnumerable
...st:
List<string> myList = myEnumerable.ToList();
myList.Sort();
Based on your comment:
_components = (from c in xml.Descendants("component")
let value = (string)c
orderby value
select value
)
.Distinct()
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Why is 'false' used after this simple addEventListener function?
...g script should be explaining the event propagation.
What I'm trying to do based this description schema is :
Following event flow down and up the following hierarchy :
<window>
<document>
<body>
<section>
<div>
<paragraph>
<span>
For the sake of simplici...
Does Java SE 8 have Pairs or Tuples?
...ant to map an index i to a pair / tuple (i, value[i]) , then filter based on the second value[i] element, and finally output just the indices.
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Android: What's the difference between Activity.runOnUiThread and View.post?
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Thank you I can now see the difference based on your explanation and the @CommonsWare comment.
– Alexander Kulyakhtin
May 12 '12 at 8:40
4
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What is the X-REQUEST-ID http header?
..., read various articles about this header, its use in Heroku, and projects based on Django.
4 Answers
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Non-CRUD operations in a RESTful service
... doesn't matter that ordering a car is not just a simple INSERT in the database. Actually, REST is not about exposing your database tables as CRUD operations. From logical point of view you are creating an order (purchase), but the server side is free to do as many processing steps as it wants.
You...