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What does ** (double star/asterisk) and * (star/asterisk) do for parameters?
...gs[a])
bar(name='one', age=27)
# age 27
# name one
Both idioms can be mixed with normal arguments to allow a set of fixed and some variable arguments:
def foo(kind, *args, **kwargs):
pass
It is also possible to use this the other way around:
def foo(a, b, c):
print(a, b, c)
obj = {'...
财务计算器拓展：复利计算、平均值、中位数、众数、方差计算 - App Invento...
Financial Calculator Extension
精心打造的“财务计算器”扩展，为您的Android应用程序增添先进的财务和统计功能。此扩展让您能够执行广泛的财务计算，从简单利息和复利到净现值和投资回报率。它还使您能够进行基本的统计计算...
Would it be beneficial to begin using instancetype instead of id?
... It was introduced with (and to help support) ARC, with the release of Lion in 2011. One thing complicating widespread adoption in Cocoa is that all the candidate methods have to be audited to see if they do [self alloc] rather than [NameOfClass alloc], because it would be super confusing to do [...
Complete Working Sample of the Gmail Three-Fragment Animation Scenario?
...ight behind middle.
showLeft() simply reverses the process, with the same mix of animators, just with the directions reversed.
The activity uses a ThreePaneLayout to hold a pair of ListFragment widgets and a Button. Selecting something in the left fragment adds (or updates the contents of) the mid...
How is std::function implemented?
... some optimizations in the STL version
the construct_f and destroy_f are mixed into one function pointer (with an additional parameter that tells what to do) as to save some bytes
raw pointers are used to store the functor object, along with a function pointer in a union, so that when a function o...
What's the difference between and in servlet
...
<context:annotation-config> declares support for general annotations such as @Required, @Autowired, @PostConstruct, and so on.
<mvc:annotation-driven /> declares explicit support for annotation-driven MVC controllers (i.e. @Request...
When to make a type non-movable in C++11?
...ve mutex type (e.g. pthread_mutex_t on POSIX platforms) might not be "location invariant" meaning the object's address is part of its value. For example, the OS might keep a list of pointers to all initialized mutex objects. If std::mutex contained a native OS mutex type as a data member and the nat...
Print string to text file
...on2.7 and higher you can use {} instead of {0}
In Python3, there is an optional file parameter to the print function
with open("Output.txt", "w") as text_file:
print("Purchase Amount: {}".format(TotalAmount), file=text_file)
Python3.6 introduced f-strings for another alternative
with open("...
When should I mock?
...other classes will use the mock instance only. So I don't see any benefits mixing integration- with unit-tests.
– Christopher Will
Jun 26 '18 at 20:13
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Bootstrap Datepicker - Months and Years Only
...inViewMode: "months"
});
Reference : Datepicker for Bootstrap
For version 1.2.0 and newer, viewMode has changed to startView, so use:
$("#datepicker").datepicker( {
format: "mm-yyyy",
startView: "months",
minViewMode: "months"
});
Also see the documentation.
...