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Why do you need to create a cursor when querying a sqlite database?
...only be used to fetch data from the DBMS into an
application but also to identify a row in a table to be updated or
deleted. The SQL:2003 standard defines positioned update and
positioned delete SQL statements for that purpose. Such statements do
not use a regular WHERE clause with predicate...
How to play with Control.Monad.Writer in haskell?
...eclare a monad instance for this, and then write the function
tell :: Monoid w => w -> Writer w ()
which simply logs its input. Now suppose you want a monad that has logging capabilities, but also does something else - say it can read from an environment too. You'd implement this as
type R...
Read a text file using Node.js?
...@wtfcoder mentions, using the "fs.readFile()" method might not be the best idea because it will buffer the entire contents of the file before yielding it to the callback function. This buffering could potentially use lots of memory but, more importantly, it does not take advantage of one of the cor...
Do I need a content-type header for HTTP GET requests?
...when it makes sense to include Content-Type and when it does not. Epoc provided information about how the header is used, and drew the conclusion that any reasonable developer would: you "ought to" use a content-type for requests that have payload bodies (mainly PUT and POST) and you probably "ought...
What is the purpose of `text=auto` in `.gitattributes` file?
...to", the path is marked for automatic end-of-line normalization. If Git decides that the content is text, its line endings are normalized to LF on checkin.
What's the default behaviour if it's not enabled?
Unspecified
If the text attribute is unspecified, Git uses the core.autocrlf conf...
Is explicitly closing files important?
... @Rohan yes, that is the little magic that the with statement provide, but of course for this magic to work the object must have the especial methods __enter__ and __exit__, in the latter the object do the close and any other cleanup stuff that need to be done at the end of the with stateme...
Python: print a generator expression?
...eally any difference, the parenthesis are only there to make the syntax valid. You do not need them if you are passing it in as the only parameter to a function for example:
>>> sorted(x*x for x in range(10))
[0, 1, 4, 9, 16, 25, 36, 49, 64, 81]
Basically all the other comprehensions ava...
What components are MVC in JSF MVC framework?
...acesServlet
In the developer picture, the architectural V is in turn dividable as below:
M - Entity
V - Facelets/JSP page
C - Managed bean
In the smaller client picture, the developer V is in turn dividable as below:
M - JSF component tree
V - Rendered HTML output
C - Client (webbrowser)
In...
WPF Application that only has a tray icon
...me pointers how to write an application that starts minimized to tray. The idea is that it periodically fetches an RSS Feed and creates a Toaster-Popup when there are new feeds.
...
What is a tracking branch?
... master
and a remote tracking branch like origin/master
Then you can consider master as a local tracking branch: It tracks the remote tracking branch origin/master which, in turn, tracks the master branch of the upstream repo origin.
...