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What is a clean, pythonic way to have multiple constructors in Python?
...sing __new__.
This could be used if the type of initialization cannot be selected based on the type of the constructor argument, and the constructors do not share code.
Example:
class MyClass(set):
def __init__(self, filename):
self._value = load_from_file(filename)
@classmeth...
Does JavaScript guarantee object property order?
...ruenbaum Your comment is false. In ES2015 the order is guaranteed only for selected methods. See answer of ftor below.
– Piotr Dobrogost
Oct 7 '16 at 15:34
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...
Renaming a virtualenv folder without breaking it
...ate_this.py instead of using the
location of the Python interpreter to
select the environment.
Note: you must run this after you've
installed any packages into the
environment. If you make an
environment relocatable, then install
a new package, you must run virtualenv
--relocatabl...
git add . vs git commit -a
...ically invokes git add on all files it knows about. You can use git add to select what files to commit. Consult the docs for more info: here
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fol...
Non greedy (reluctant) regex matching in sed?
...nswering your question
Using approach #2 (delimited expression) you should select two appropriate expressions:
EDE: [^:/]\/
SDE: http:
Usage:
$ sed 's/\([^:/]\/\).*/\1/g; s/\(\(http:.*\)*.\)*/\1/' <<< 'http://www.suepearson.co.uk/product/174/71/3816/'
Output:
http://www.suepearson.co.u...
Do I need to disable NSLog before release Application?
...s is through 'edit scheme' -> 'run app name' -> under the tab 'info' select using the drop-down box between debug & release. In the release version you won't see any NSLog output in the debug console !
How does this all work?
first of all, one must know that a preprocessor is relatively ...
Edit and Continue: “Changes are not allowed when…”
...o edit it.
(vs2017) Go to Tools > Options > Debugging and uncheck (deselect) 'Edit and Continue'. This is actually the opposite of the 'conventional' advice (see some other points in this post). It does not allow you to actually make changes in your running program (i.e. it does not hot-swap t...
optional parameters in SQL Server stored proc?
...rameter*/
INSERT INTO ........
END
/* and use it in the query as so*/
SELECT *
FROM Table
WHERE Column = @Parameter
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How to attach my repo to heroku app
...hboard.heroku.com/apps
Look at the plus sign on the top right corner then select
Create new app
Leave the application name blank to let heroku choose one for you.
Let say your heroku app name is new-app-xxxxx, so to test on adding a file in to it you may try the following command:
git clone http...
Catch multiple exceptions in one line (except block)
...e variable if you have long exception handling or your IDE only highlights selections larger than that, as mine does.) The instance has an args attribute. Here is an example:
import sys
try:
mainstuff()
except (KeyboardInterrupt, EOFError) as err:
print(err)
print(err.args)
sys.ex...