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What are some (concrete) use-cases for metaclasses?
...ent the figure count, call draw manually, etc, but I needed to do these before and after every plotting call. So to create both an interactive plotting wrapper and an offscreen plotting wrapper, I found it was more efficient to do this via metaclasses, wrapping the appropriate methods, than to do s...
Requests — how to tell if you're getting a 404
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if r.status_code == 404:
# A 404 was issued.
Demo:
>>> import requests
>>> r = requests.get('http://httpbin.org/status/404')
>>> r.status_code
404
If you want requests to raise an exception for error codes (4xx or 5xx), call r.raise_for_status():
>>> r ...
What is the purpose of wrapping whole Javascript files in anonymous functions like “(function(){ … }
...hat the whole file is wrapped like the following in the .js files to be imported.
8 Answers
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Disable Interpolation when Scaling a
...g canvas elements are rendered when scaled up , not to do with how lines or graphics are rendered onto a canvas surface . In other words, this has everything to do with interpolation of scaled elements , and nothing to do with antialiasing of graphics being drawn on a canvas. I'm not concern...
ReferenceError: event is not defined error in Firefox
I've made a page for a client and I initially was working in Chrome and forgot to check if it was working in Firefox. Now, I have a big problem because the whole page is based upon a script that doesn't work in Firefox.
...
What happens if you call erase() on a map element while iterating from begin to end?
...nt needs to be erased. Is it safe to erase the element and keep iterating or do I need to collect the keys in another container and do a second loop to call the erase()?
...
delete_all vs destroy_all?
I am looking for the best approach to delete records from a table. For instance, I have a user whose user ID is across many tables. I want to delete this user and every record that has his ID in all tables.
...
Mercurial - all files that changed in a changeset?
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For easy copying: hg status --no-status --change REV
– zastrowm
Jul 9 '13 at 15:58
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How to use http.client in Node.js if there is basic authorization
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You have to set the Authorization field in the header.
It contains the authentication type Basic in this case and the username:password combination which gets encoded in Base64:
var username = 'Test';
var password = '123';
var auth = 'Basic ' + Bu...
Difference between `set`, `setq`, and `setf` in Common Lisp?
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Originally, in Lisp, there were no lexical variables -- only dynamic ones. And
there was no SETQ or SETF, just the SET function.
What is now written as:
(setf (symbol-value '*foo*) 42)
was written as:
(set (quote *foo*) ...