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Is there a simple, elegant way to define singletons? [duplicate]
...se the Instance method. Here's an example:
@Singleton
class Foo:
def __init__(self):
print 'Foo created'
f = Foo() # Error, this isn't how you get the instance of a singleton
f = Foo.instance() # Good. Being explicit is in line with the Python Zen
g = Foo.instance() # Returns already ...
Applying a function to every row of a table using dplyr?
...function(x) 1:5, .collate = "cols")
produces, respectively:
# A tibble: 32 × 3
mpg cyl .out
<dbl> <dbl> <list>
1 21.0 6 <int [5]>
2 21.0 6 <int [5]>
3 22.8 4 <int [5]>
4 21.4 6 <int [5]>
5 18.7 8 <int [5...
How to set RelativeLayout layout params in code not in xml?
...000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4.61182 48.1414 4.61182C47.4335 4.61182 46.7256 4.91628 46.0943 5.50789C45.7307 4.9328 4...
How to create json by JavaScript for loop?
...
system PAUSEsystem PAUSE
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Maximum number of records in a MySQL database table
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KM.KM.
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How to make overlay control above all other controls?
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Robert RossneyRobert Rossney
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Alter column, add default constraint
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SQLMenaceSQLMenace
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How to add a line break in C# .NET documentation
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You can use a <para /> tag to produce a paragraph break or you can wrap text in <para...
Bash set +x without it being printed
...
answered Jul 1 '14 at 18:32
user108471user108471
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...
How to make a class property? [duplicate]
...re's how I would do this:
class ClassPropertyDescriptor(object):
def __init__(self, fget, fset=None):
self.fget = fget
self.fset = fset
def __get__(self, obj, klass=None):
if klass is None:
klass = type(obj)
return self.fget.__get__(obj, klass)(...