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Expert R users, what's in your .Rprofile? [closed]
...se it might breaks my coauthors' code, I wish it was the default. Why?
1) Character vectors use less memory (but only barely);
2) More importantly, we would avoid problems such as:
> x <- factor(c("a","b","c"))
> x
[1] a b c
Levels: a b c
> x <- c(x, "d")
> x
[1] "1" "2" "3" "...
VS Addin插件基本开发入门 - C/C++ - 清泛网 - 专注C/C++及内核技术
...ext_ConnectMode.ext_cm_AfterStartup)
{
const string TOOLWINDOW_GUID = "{6CCD0EE9-20DB-4636-9149-665A958D8A9A}";
object myUserControlObject = null;
EnvDTE80.Windows2 windows2 = (EnvDTE80.Windows2)_applicationObject.Windows;
...
What is the result of % in Python?
...
Somewhat off topic, the % is also used in string formatting operations like %= to substitute values into a string:
>>> x = 'abc_%(key)s_'
>>> x %= {'key':'value'}
>>> x
'abc_value_'
Again, off topic, but it seems to be a little document...
JSON serialization of Google App Engine models
...rt datetime
import time
SIMPLE_TYPES = (int, long, float, bool, dict, basestring, list)
def to_dict(model):
output = {}
for key, prop in model.properties().iteritems():
value = getattr(model, key)
if value is None or isinstance(value, SIMPLE_TYPES):
output[key...
Append an object to a list in R in amortized constant time, O(1)?
...
If it's a list of string, just use the c() function :
R> LL <- list(a="tom", b="dick")
R> c(LL, c="harry")
$a
[1] "tom"
$b
[1] "dick"
$c
[1] "harry"
R> class(LL)
[1] "list"
R>
That works on vectors too, so do I get the bo...
How to sort an array by a date property
...
Simplest Answer
array.sort(function(a,b){
// Turn your strings into dates, and then subtract them
// to get a value that is either negative, positive, or zero.
return new Date(b.date) - new Date(a.date);
});
More Generic Answer
array.sort(function(o1,o2){
if (sort_o1_bef...
Get the data received in a Flask request
...nt to my Flask app. I've tried accessing request.data but it is an empty string. How do you access request data?
18 Answe...
ElasticSearch, Sphinx, Lucene, Solr, Xapian. Which fits for which usage? [closed]
...must be unique
# that is why I like sphinx
# you can store custom string fields into indexes (memory) as well
sql_field_string = title
sql_field_string = slug
sql_field_string = content
sql_field_string = tags
sql_attr_uint = category
# integer fields must be define...
Meaning of numbers in “col-md-4”,“ col-xs-1”, “col-lg-2” in Bootstrap
...ey are used to define at which screen size that class should apply:
xs = extra small screens (mobile phones)
sm = small screens (tablets)
md = medium screens (some desktops)
lg = large screens (remaining desktops)
Read the "Grid
Options"
chapter from the official Bootstrap documentation f...
How to make a Java Generic method static?
... using a specific type (_class_.<_generictypeparams_>_methodname_):
String[] newStrings = ArrayUtils.<String>appendToArray(strings, "another string");
This would only happen if the compiler can't determine the generic type because, e.g. the generic type isn't related to the method arg...