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How to think in data stores instead of databases?

... The datastore makes no distinction between inserts and updates. When you call put() on an entity, that entity gets stored to the datastore with its unique key, and anything that has that key gets overwritten. Basically, each entity kind in the datastore acts like an enormous map or sorted list. Que...
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JavaScript for detecting browser language preference [duplicate]

... I think the main problem here is that the browser settings don't actually affect the navigator.language property that is obtained via javascript. What they do affect is the HTTP 'Accept-Language' header, but it appears this value is not available through javascript at all. (Probably why @and...
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Reverse a string in Python

... @Tanner [::-1] is fastest because it does not call any external functions, rather it's using slicing, which is highly-optimized in python. ''.join(list(reversed(s))) makes 3 function calls. – hd1 Apr 27 at 13:51 ...
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using lodash .groupBy. how to add your own keys for grouped output?

...t hard to wrap my head around. Can you explain the steps in between, especially the pairing and zipping (and the double zip, since _.object is an alias for _.zipObject). – Benny Bottema Jul 31 '15 at 9:17 ...
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SqlAlchemy - Filtering by Relationship Attribute

...ts = Patient.query.filter(Patient.mother.has(phenoscore=10)) or join (usually faster): patients = Patient.query.join(Patient.mother, aliased=True)\ .filter_by(phenoscore=10) share | ...
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AWS S3 copy files and folders between two buckets

...rows the following error A client error (PermanentRedirect) occurred when calling the ListObjects operation: The bucket you are attempting to access must be addressed using the specified endpoint. Please send all future requests to this endpoint. – Giovanni Bitliner ...
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Calling dynamic function with dynamic number of parameters [duplicate]

I’m looking for a trick about this. I know how to call a dynamic, arbitrary function in JavaScript, passing specific parameters, something like this: ...
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Importing from a relative path in Python

...his method is still commonly used in some situations, where you aren't actually ever 'installing' your package. For example, it's popular with Django users. You can add Common/ to your sys.path (the list of paths python looks at to import things): import sys, os sys.path.append(os.path.join(os.p...
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Dynamically replace the contents of a C# method?

What I want to do is change how a C# method executes when it is called, so that I can write something like this: 9 Answers ...
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How to customize user profile when using django-allauth

I have a django project with the django-allauth app. I need to collect additional data from the user at signup. I came across a similar question here but unfortunately, no one answered the profile customization part. ...