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In practice, what are the main uses for the new “yield from” syntax in Python 3.3?
...or v in g: yield v does not even begin to do justice to what yield from is all about. Because, let's face it, if all yield from does is expand the for loop, then it does not warrant adding yield from to the language and preclude a whole bunch of new features from being implemented in Python 2.x.
Wh...
add column to mysql table if it does not exist
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OK this is really crude but someone's got to say it. if you are simply running a SQL script from the command line, you can give mysql the --force switch, which means keep going even if there's an error. then, just go for it. you just want...
What's the difference between parenthesis $() and curly bracket ${} syntax in Makefile?
... like unomadh GNU make example.
From the GNU make manual on the Function Call Syntax (emphasis mine):
[…] If the arguments themselves contain other function calls or variable references, it is wisest to use the same kind of delimiters for all the references; write $(subst a,b,$(x)), not $(sub...
How does functools partial do what it does?
...xtend(extra_args)
return func(*args)
return wrapper
So, by calling partial(sum2, 4) you create a new function (a callable, to be precise) that behaves like sum2, but has one positional argument less. That missing argument is always substituted by 4, so that partial(sum2, 4)(2) == sum2...
How to detect if a property exists on an ExpandoObject?
...a dynamic invocation, with the case you get in the internals. More specifically, it is explicitly implemented: github.com/mono/mono/blob/master/mcs/class/dlr/Runtime/…
– Dykam
Feb 4 '15 at 18:04
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C++特化模板函数的符号多重定义错误问题 - C/C++ - 清泛网 - 专注C/C++及内核技术
...板特化的成员定义不能以符号template<>作为打头.
(32)类模板部分特化
还是一个模板,只是部分模板参数通过具体的类型特化了.
如果类模板有一个以上的模板参数,则有些人就可能希望为一个特定的模板实参...
Conveniently Declaring Compile-Time Strings in C++
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@user975326: I just reviewed my implementation of this and it looks like I added a constexpr operator==. Sorry. Scott's presentation should get you started on how to do this. It is much easier in C++14 than in C++11. I wouldn't ...
Finding Variable Type in JavaScript
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wzhscript
322 bronze badges
answered Dec 16 '10 at 0:22
Felix KlingFelix Kling
666k15115...
Styling Google Maps InfoWindow
...ylabel">The label</div>',
position: new google.maps.LatLng(-32.0, 149.0),
shadowStyle: 1,
padding: 0,
backgroundColor: 'rgb(57,57,57)',
borderRadius: 5,
arrowSize: 10,
borderWidth: 1,
borderColor: '#2c2c2c',
disableAutoPan: true,
h...
Removing duplicates from a list of lists
... much easier that it offers good returns on efforts. But sometimes (essentially for "tragically crucial bottlenecks" in deep inner loops of code that's pushing the boundaries of performance limits) one may need to go into much more detail, providing probability distributions, deciding which performa...