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Can existing virtualenv be upgraded gracefully?
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You can use the Python 2.6 virtualenv to "revirtual" the existing directory. You will have to re...
What is the best way to do a substring in a batch file?
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3 Answers
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MongoDB: Combine data from multiple collections into one..how?
...b.users.save({firstName:"Sarah",lastName:"T",gender:"F",country:"US",age:"13"});
var users = db.users.find();
db.comments.save({userId: users[0]._id, "comment": "Hey, what's up?", created: new ISODate()});
db.comments.save({userId: users[1]._id, "comment": "Not much", created: new ISODate()});
db.co...
How to check if a model has a certain column/attribute?
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3 Answers
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Default value for field in Django model
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Reverse / invert a dictionary mapping
...Python 2.7.x
inv_map = {v: k for k, v in my_map.iteritems()}
For Python 3+:
inv_map = {v: k for k, v in my_map.items()}
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Define variable to use with IN operator (T-SQL)
...List VALUES (1)
INSERT INTO @MyList VALUES (2)
INSERT INTO @MyList VALUES (3)
INSERT INTO @MyList VALUES (4)
SELECT *
FROM MyTable
WHERE MyColumn IN (SELECT Value FROM @MyList)
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iTunes Connect: How to choose a good SKU?
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306
You are able to choose one that you like, but it has to be unique.
Every time I have to enter...
How do you use String.substringWithRange? (or, how do Ranges work in Swift?)
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33 Answers
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How to dynamically build a JSON object with Python?
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Dan Loughney
4,04033 gold badges2121 silver badges3636 bronze badges
answered Apr 16 '14 at 13:07
Martijn Pieters♦Mar...