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What is the overhead of creating a new HttpClient per call in a WebAPI client?

...ared between requests for these handlers also needs to be provided. The more you use the features of HttpClient, the more you will see that reusing an existing instance makes sense. However, the biggest issue, in my opinion is that when a HttpClient class is disposed, it disposes HttpClientHandl...
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What are commit-ish and tree-ish in Git?

...ers to files, I'm not sure if it's still considered "tree-ish", or if acts more like "blob-ish" (Git refers to files as "blobs"). The Long Answer Commits and Directory Trees in Git At its lowest levels, Git keeps track of source code using four fundamental objects: Annotated tags, which point t...
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How to save a Python interactive session?

...sion.py (to help with this, every line is prefixed by its number). Furthermore, the documentation states: This function uses the same syntax as %history for input ranges, then saves the lines to the filename you specify. This allows for example, to reference older sessions, such as %save cur...
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Finding duplicate values in a SQL table

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How do I switch between the header and implementation file in Xcode 4?

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No connection string named 'MyEntities' could be found in the application config file

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How to get a Docker container's IP address from the host

... !WARNING! This doesn't work anymore. The new format is specific to the container and follows the form {{ .NetworkSettings.Networks.$network.IPAddress }}. The default appears to be bridge, but under docker-compose this will be a specific name that depends o...
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How do I create a foreign key in SQL Server?

...able. That might be the behaviour you want, but in my experience, it much more commonly isn't. If you instead create it like this: alter table MyTable add constraint MyTable_MyColumn_FK FOREIGN KEY ( MyColumn ) references MyOtherTable(PKColumn) on update cascade on delete cascade ..then updat...
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How to pick just one item from a generator?

... I should have been more clear. g.next() is g.__next__() in py3k. The builtin next(iterator) has been around since Python 2.6, and is what should be used in all new Python code, and it's trivial to backimplement if you need to support py <= 2...
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Difference between \w and \b regular expression meta characters

... It's more correct to say that it's the boundary between a word character and not a word character because it also matches between a word character and the start or end of a string if that character is at the start/end of the strin...