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How to make an immutable object in Python?
...ter(1))
p = Point(2, 3)
p.x
# 2
p.y
# 3
Edit: If you want to get rid of indexing either, you can override __getitem__():
class Point(tuple):
__slots__ = []
def __new__(cls, x, y):
return tuple.__new__(cls, (x, y))
@property
def x(self):
return tuple.__getitem__(se...
How to tell if node.js is installed or not
...ory using mkdir NodeJs. Inside the NodeJs folder create a file using touch index.js. Open your index.js either using vi or in your favourite text editor. Type in console.log('Welcome to NodesJs.') and save it. Navigate back to your saved file and type node index.js. If you see Welcome to NodesJs. yo...
What does 'COLLATE SQL_Latin1_General_CP1_CI_AS' do?
... such as object names (i.e. sys.objects), column names (i.e. sys.columns), index names (i.e. sys.indexes), etc.
The Collation used for Database-level objects: tables, columns, indexes, etc.
Also:
ASCII is an encoding which is 8-bit (for common usage; technically "ASCII" is 7-bit with character v...
Illegal mix of collations (utf8_unicode_ci,IMPLICIT) and (utf8_general_ci,IMPLICIT) for operation '=
...aka the COLLATE cast approach, can lead to potential bottleneck, cause any index defined on the column will not be used causing a full scan.
Even though I did not try out Option 3, my hunch is that it will suffer the same consequences of option 1 and 2.
Lastly, Option 4 is the best option for very...
Is there a way to get the source code from an APK file?
...hat a Java Environment is installed (for Linux check the notes regarding required libraries as well)
Start: apktool decode [apk file]
Intermediate result: resource files, AndroidManifest.xml
unzip APK file with an unpacker of your choice
Intermediate result: classes.dex
download and extract dex2jar...
Loading basic HTML in Node.js
...ugh.
var http = require('http'),
fs = require('fs');
fs.readFile('./index.html', function (err, html) {
if (err) {
throw err;
}
http.createServer(function(request, response) {
response.writeHeader(200, {"Content-Type": "text/html"});
response.wr...
multiprocessing: How do I share a dict among multiple processes?
A program that creates several processes that work on a join-able queue, Q , and may eventually manipulate a global dictionary D to store results. (so each child process may use D to store its result and also see what results the other child processes are producing)
...
Pry: show me the stack
...personal_site/app/controllers/posts_controller.rb @ line 7 PostsController#index:
5: def index
6: @posts = Post.all
=> 7: binding.pry
8: end
[1] pry(#<PostsController>)> show-stack
Showing all accessible frames in stack (65 in total):
--
=> #0 index <PostsContr...
How does TransactionScope roll back transactions?
... enlist with it. Caution if there are more the one connection to the same SQL server this will escalate to a Distribtued Transaction.
What happens since you're using a using block you are ensuring dispose will be called even if an exception occurs. So if dispose is called before txScope.Complete()...
How to git-cherry-pick only changes to certain files?
...fications you do want
git add <path>
# make the work tree match the index
# (do this from the top level of the repo)
git checkout .
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