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How do servlets work? Instantiation, sessions, shared variables and multithreading
...ance, allowing you to set the headers and the body (usually with generated HTML content from a JSP file). When the HTTP response is committed and finished, both the request and response objects are recycled and made available for reuse.
HttpSession
When a client visits the webapp for the first tim...
Filter rows which contain a certain string
...Computing and Graphics
# http://stat-computing.org/dataexpo/2009/the-data.html
df <- read_csv("Downloads/2008.csv")
print(dim(df))
# [1] 7009728 29
benchmark(
"str_detect" = {df %>% filter(str_detect(Dest, 'MCO|BWI'))},
"grepl" = {df %>% filter(grepl('MCO|BWI', Dest))},
replica...
REST vs JSON-RPC? [closed]
...use already implemented libraries for particular media formats (e.g. Atom, HTML, Collection+JSON, HAL etc...)
It's possible to easily change URIs without breaking clients as far as they only depend on registered (or domain specific) link relations;
It's possible to embed form-like structures in rep...
How do you calculate the average of a set of circular data? [closed]
...Wiley & Sons, Inc. as mentioned at http://catless.ncl.ac.uk/Risks/7.44.html#subj4 by Bruce Karsh.
A good way to estimate an average angle, A, from a set of angle measurements
a[i] 0<=i
sum_i_from_1_to_N sin(a[i])
a = arctangent ---------------------------
...
How exactly do Django content types work?
...ns for you:
1: examine this code
def index(request):
media_type='text/html'
if request.META.has_key('CONTENT_TYPE'):
media_type = request.META['CONTENT_TYPE'].split(';')[0]
if media_type.lower() == 'application/json':
return HttpResponse("""{ "ResponseCode": "Success"}""", co...
Transitioning from Windows Forms to WPF
...ays think in a manner of at least Data and View. Data and Winforms / WPF / HTML whatever.
– Bernoulli IT
Jul 12 '14 at 13:29
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How to filter NSFetchedResultsController (CoreData) with UISearchDisplayController/UISearchBar
...tation/uikit/reference/UISearchDisplayController_Class/Reference/Reference.html
Here's what I did -
Added the searchIsActive flag:
@interface ItemTableViewController : UITableViewController <NSFetchedResultsControllerDelegate, UISearchDisplayDelegate, UISearchBarDelegate> {
NSString *...
How does the compilation/linking process work?
...ssed at CProgramming.com:
https://www.cprogramming.com/compilingandlinking.html
Here is what the author there wrote:
Compiling isn't quite the same as creating an executable file!
Instead, creating an executable is a multistage process divided into
two components: compilation and linking. In realit...
Why do I need 'b' to encode a string with Base64?
...? 2.x or 3.x?
Edit: See http://docs.python.org/release/3.0.1/whatsnew/3.0.html#text-vs-data-instead-of-unicode-vs-8-bit for the gory details of strings in Python 3.x
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How to implement a queue using two stacks?
...
@Tyler: Check sgi.com/tech/stl/Deque.html . Deque "suports random access to elements" . Hence both deque and stack are array based. This is because it gives you better locality of reference and hence is faster in practice.
– Thomas Ahle
...