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How do I implement IEnumerable
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You might as well inherit from Collection<MyObject> and then you won't have to write any custom code.
– John Alexiou
Oct 2 '18 at 21:23
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How do I know if a generator is empty from the start?
...w the programmer to ask whether there is another value without removing it from the "queue" if there is. There is such thing as single peek-ahead without requiring "backward traversal". That's not to say an iterator design must supply such a feature, but it sure is useful. Maybe you're objecting on ...
How to check if a string contains an element from a list in Python
...handle http://.../file.doc?foo and http://.../foo.doc/file.exe correctly.
from urlparse import urlparse
import os
path = urlparse(url_string).path
ext = os.path.splitext(path)[1]
if ext in extensionsToCheck:
print(url_string)
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What does the “yield” keyword do?
... generator object, this is a bit tricky :-)
Then, your code will continue from where it left off each time for uses the generator.
Now the hard part:
The first time the for calls the generator object created from your function, it will run the code in your function from the beginning until it hit...
mmap() vs. reading blocks
...d I came across a nice post (link) on the Linux kernel mailing list. It's from 2000, so there have been many improvements to IO and virtual memory in the kernel since then, but it nicely explains the reason why mmap or read might be faster or slower.
A call to mmap has more overhead than read (ju...
Should I declare Jackson's ObjectMapper as a static field?
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Yes, that is safe and recommended.
The only caveat from the page you referred is that you can't be modifying configuration of the mapper once it is shared; but you are not changing configuration so that is fine. If you did need to change configuration, you would do that from ...
Regex to validate date format dd/mm/yyyy
...ted it online using some website and now i also don't remember the website from which I generated this image. I will add the reference once I remember:)
– Alok Chaudhary
Apr 10 '15 at 3:58
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AngularJS ui-router login authentication
... // check and see if we have retrieved the
// identity data from the server. if we have,
// reuse it by immediately resolving
if (angular.isDefined(_identity)) {
deferred.resolve(_identity);
return deferred.promise;
}
// otherwise...
How do you serialize a model instance in Django?
...d that's all what django serializers need to correctly serialize it, eg.:
from django.core import serializers
# assuming obj is a model instance
serialized_obj = serializers.serialize('json', [ obj, ])
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Can I prevent the Firefox developer tools network panel from clearing on page reload?
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From Firefox 31 onwards you can use the "Enable persistent logs" setting to prevent the Network Monitor from clearing the list on reload.
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