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How to retrieve POST query parameters?
... parameter handling (qs) rather than the low-level querystring library. In order to parse repeated parameters with qs, the parameter needs to have brackets: name[]=val1&name[]=val2. It also supports nested maps. In addition to parsing HTML form submissions, the bodyParser can parse JSON requests...
How do you cast a List of supertypes to a List of subtypes?
...cast(a));
}
}
return listB;
}
This method can be used in order to filter arbitrary lists (not only with a given Subtype-Supertype relationship regarding the type parameters), as in this example:
// A list of type "List<Number>" that actually
// contains Integer, Double and ...
Rank function in MySQL
...rRank := @curRank + 1 AS rank
FROM person p, (SELECT @curRank := 0) r
ORDER BY age;
The (SELECT @curRank := 0) part allows the variable initialization without requiring a separate SET command.
Test case:
CREATE TABLE person (id int, first_name varchar(20), age int, gender char(1));
INSERT...
Access an arbitrary element in a dictionary in Python
...te that "first" may not be an appropriate term here because dict is not an ordered type in Python < 3.6. Python 3.6+ dicts are ordered.
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follo...
Unable to forward search Bash history similarly as with CTRL-r
...suggest box style" filtering of Bash history with (optional) metrics based ordering i.e. it is much more efficient and faster in both forward and backward directions:
It can be easily bound to Ctrl-r and/or Ctrl-s
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Arduino Sketch upload issue - avrdude: stk500_recv(): programmer is not responding
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FYI - I had to install the latest FTDI drivers in order to resolve this issue permanently
– Scott Silvi
Jun 22 '14 at 17:50
2
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SOAP vs REST (differences)
...Questions and Answers, we'd have a static documentation explaining that in order to view a question, you have to take the URI stackoverflow.com/questions/<id>, replace id with the Question.id and paste that on your browser. That's nonsense, but that's what many people think REST is.
This las...
@import vs #import - iOS 7
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Highly active question. Earn 10 reputation in order to answer this question. The reputation requirement helps protect this question from spam and non-answer activity.
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Scatter plot and Color mapping in Python
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Note that the array you pass as c doesn't need to have any particular order or type, i.e. it doesn't need to be sorted or integers as in these examples. The plotting routine will scale the colormap such that the minimum/maximum values in c correspond to the bottom/top of the colormap.
Colorma...
Rename a dictionary key
... old name key; and without iterating through dict key/value?
In case of OrderedDict, do the same, while keeping that key's position.
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