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How to run functions in parallel?
... print(f'{seconds} has been processed')
secs_list = [2,4, 6, 8, 10, 12]
Now, if your operation is IO bound, then you can use the ThreadPoolExecutor as such:
with ThreadPoolExecutor() as executor:
results = executor.map(sleep_secs, secs_list)
Note how map is used here to map your function to ...
How to check if one DateTime is greater than the other in C#
... new DateTime(2015,1,1);
DateTime end = new DateTime(2015,12,31);
DateTime now = new DateTime(2015,8,20);
if(now.IsBetween(start, end))
{
//Your code here
}
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How to create a GUID/UUID using iOS
...ns the Unique ID of your iPhone.
EDIT: -[UIDevice uniqueIdentifier] is now deprecated and apps are being rejected from the App Store for using it. The method below is now the preferred approach.
If you need to create several UUID, just use this method (with ARC):
+ (NSString *)GetUUID
{
CFU...
What's the deal with a leading underscore in PHP class methods?
...the most authoritative source for these kinds of conventions for PHP right now would be the PSR-2: Coding Style Guide because the Zend Framework is part of PSR:
Property names SHOULD NOT be prefixed with a single underscore to indicate protected or private visibility.
...
PHP: Storing 'objects' inside the $_SESSION
... it quite cool because when I jump to another page I still have my object. Now before I start using this approach I would like to find out if it is really such a good idea or if there are potential pitfalls involved.
...
Regex lookahead, lookbehind and atomic groups
...ume any characters so that search for REGEX_2 starts at the same location. Now REGEX_2 makes sure that the string matches some other rules. Without look-ahead it would match strings of length three or five.
Negative lookahead
Syntax:
(?!REGEX_1)REGEX_2
Match only if REGEX_1 does not match; af...
Token Authentication for RESTful API: should the token be periodically changed?
... deleted')
# This is required for the time comparison
utc_now = datetime.utcnow()
utc_now = utc_now.replace(tzinfo=pytz.utc)
if token.created < utc_now - timedelta(hours=24):
raise exceptions.AuthenticationFailed('Token has expired')
return t...
Debugging Package Manager Console Update-Database Seed Method
... when I run Update-Database from the Package Manager Console but didn't know how to do it. I wanted to share the solution with others in case they have the same issue.
...
In Python, how can you load YAML mappings as OrderedDicts?
... pypy for some time (although considered CPython implementation detail for now).
Update: In python 3.7+, the insertion-order preservation nature of dict objects has been declared to be an official part of the Python language spec, see What's New In Python 3.7.
I like @James' solution for its simpl...
mongodb: insert if not exists
... specify what data you want to write:
data = {"$set":{"key2":"value2"}}
Now your selected document will update the value of "key2" only and leave everything else untouched.
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