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transform object to array with lodash
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You can do
var arr = _.values(obj);
For documentation see here.
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SQL Server CTE and recursion example
...loyees
WHERE EmployeeID = cteReports.MgrID) AS Manager
FROM cteReports
ORDER BY EmpLevel, MgrID
The simplest example of a recursive CTE I can think of to illustrate its operation is;
;WITH Numbers AS
(
SELECT n = 1
UNION ALL
SELECT n + 1
FROM Numbers
WHERE n+1 <= 10
)
S...
Finding three elements in an array whose sum is closest to a given number
...e for that i, since we'd be summing the same elements, just in a different order. After that point, we try the next i and repeat.
Eventually, we'll either exhaust the useful possibilities, or we'll find the solution. You can see that this is O(n2) since we execute the outer loop O(n) times and we e...
Using python's eval() vs. ast.literal_eval()?
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datamap = eval(raw_input('Provide some data here: ')) means that you actually evaluate the code before you deem it to be unsafe or not. It evaluates the code as soon as the function is called. See also the dangers of eval.
ast.literal_eval ra...
How do you create a static class in C++?
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yes but in namespace you have to keep the function order, in contrast to class with static members, for example void a(){b();} b(){} would yield an error in a namespace but not in a class with static members
– Moataz Elmasry
Aug 23 '12 a...
Python decorators in classes
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Would something like this do what you need?
class Test(object):
def _decorator(foo):
def magic( self ) :
print "start magic"
foo( self )
print "end magic"
return magic
@_decorator
def bar( self ) :
print "normal call"
test ...
Convert sqlalchemy row object to python dict
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You may access the internal __dict__ of a SQLAlchemy object, like the following::
for u in session.query(User).all():
print u.__dict__
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How to dynamically load a Python class
Given a string of a Python class, e.g. my_package.my_module.MyClass , what is the best possible way to load it?
10 Answers...
How to refer to relative paths of resources when working with a code repository
...Try to use a filename relative to the current files path. Example for './my_file':
fn = os.path.join(os.path.dirname(__file__), 'my_file')
In Python 3.4+ you can also use pathlib:
fn = pathlib.Path(__file__).parent / 'my_file'
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Multiple arguments vs. options object
...plicated. If one of them relies on the others, so that they have a certain order (e.g. the fourth one needs the third one), you still should use multiple arguments. Nearly all native EcmaScript and DOM-methods work like this. A good example is the open method of XMLHTTPrequests, where the last 3 arg...