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Using generic std::function objects with member functions in one class
For one class I want to store some function pointers to member functions of the same class in one map storing std::function objects. But I fail right at the beginning with this code:
...
How can I do a line break (line continuation) in Python?
...thing like this:
if a == True and \
b == False
Check the style guide for more information.
From your example line:
a = '1' + '2' + '3' + \
'4' + '5'
Or:
a = ('1' + '2' + '3' +
'4' + '5')
Note that the style guide says that using the implicit continuation with parentheses is pref...
Fastest way to get the first object from a queryset in django?
...of ways to do this which all work. But I'm wondering which is the most performant.
8 Answers
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How to check if a variable is a dictionary in Python?
...ou had subclassed dict:
d = {'abc':'abc','def':{'ghi':'ghi','jkl':'jkl'}}
for ele in d.values():
if isinstance(ele,dict):
for k, v in ele.items():
print(k,' ',v)
share
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impr...
How to convert an xml string to a dictionary?
...entTree
class XmlListConfig(list):
def __init__(self, aList):
for element in aList:
if element:
# treat like dict
if len(element) == 1 or element[0].tag != element[1].tag:
self.append(XmlDictConfig(element))
...
Creating a dynamic choice field
...
you can filter the waypoints by passing the user to the form init
class waypointForm(forms.Form):
def __init__(self, user, *args, **kwargs):
super(waypointForm, self).__init__(*args, **kwargs)
self.fields['waypoints'] = forms.ChoiceField(
choices=[...
How to get the parent dir location
...
os.pardir is a better way for ../ and more readable.
import os
print os.path.abspath(os.path.join(given_path, os.pardir))
This will return the parent path of the given_path
...
Mocking a class: Mock() or patch()?
...ass(object):
... def __init__(self):
... print 'Created MyClass@{0}'.format(id(self))
...
>>> def create_instance():
... return MyClass()
...
>>> x = create_instance()
Created MyClass@4299548304
>>>
>>> @mock.patch('__main__.MyClass')
... def create_ins...
Read-only and non-computed variable properties in Swift
...tract that differs depending on who the caller is), here's what I would do for now:
class Clock {
struct Counter {
var hours = 0;
var minutes = 0;
var seconds = 0;
mutating func inc () {
if ++seconds >= 60 {
seconds = 0
...
How to remove the querystring and get only the url?
Im using PHP to build the URL of the current page. Sometimes, URLs in the form of
16 Answers
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