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Django admin: how to sort by one of the custom list_display fields that has no database field
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def get_queryset(self, request):
# def queryset(self, request): # For Django <1.6
qs = super(CustomerAdmin, self).get_queryset(request)
# qs = super(CustomerAdmin, self).queryset(request) # For Django <1.6
qs = qs.annotate(models.Count('order'))
return ...
Is it possible to select the last n items with nth-child?
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(-n+2) => This is what I'm looking for. Thanks
– Surjith S M
Dec 11 '13 at 7:43
16
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Are there any downsides to enabling git rerere?
...d it, then do the "same" merge again, it will be incorrect again. You can forget a recorded resolution, though. From the documentation:
git rerere forget <pathspec>
This resets the conflict resolutions which rerere has recorded for the current conflict in <pathspec>.
Be careful to use...
Difference between web reference and service reference?
... Web Services or Python-based or Ruby so long as they all talk WSDL and conform to the WS-I interoperability standard).
A Service Reference will create a client proxy class that communicates with a WCF-based service : regardless of whether that WCF service is a Web Service or not.
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Command line: piping find results to rm
...e that if file names can contain whitespace characters, you should correct for that:
find -type f -name '*.sql' -mtime +15 -print0 | xargs -0 rm
But actually, find has a shortcut for this: the -delete option:
find -type f -name '*.sql' -mtime +15 -delete
Please be aware of the following warnin...
TypeError: 'dict_keys' object does not support indexing
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This is a strange breaking change design decision for python3.
– Jason
Jun 19 '17 at 23:49
9
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What are the differences between segment trees, interval trees, binary indexed trees and range trees
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All these data structures are used for solving different problems:
Segment tree stores intervals, and optimized for "which of these intervals contains a given point" queries.
Interval tree stores intervals as well, but optimized for "which of these intervals...
Serving gzipped CSS and JavaScript from Amazon CloudFront via S3
I've been looking for ways of making my site load faster and one way that I'd like to explore is making greater use of Cloudfront.
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Ruby regular expression using variable name
... The variable doesn't have to be string type (and in fact, regex is better for reasons outlined in Wayne's answer).
– mahemoff
Jan 24 '18 at 11:04
add a comment
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Difference between json.js and json2.js
...ent the basic prototypes if they have not already been augmented.
// These forms are obsolete. It is recommended that JSON.stringify and
// JSON.parse be used instead.
if (!Object.prototype.toJSONString) {
Object.prototype.toJSONString = function (filter) {
return JSON.stringify(this, f...