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What are the differences between a multidimensional array and an array of arrays in C#?
...0.349 25.861 26.214 19.677 20.171
5.050 5.085 6.412 5.225 5.100 5.751 6.650 5.222 6.770 5.305
The first row are timings of jagged arrays, the second shows multidimensional arrays and the third, well that's how it should be. The program is shown below, FYI this was tested r...
Convert Rows to columns using 'Pivot' in SQL Server
...a';
Begin
Declare @query varchar(max)='';
Declare @aggDet varchar(100);
Declare @opp_agg varchar(5);
Declare @col_agg varchar(100);
Declare @pivot_col sysname;
Declare @query_col_pvt varchar(max)='';
Declare @full_query_pivot varchar(max)='';
Declare @ind_tmpTbl int;...
binning data in python with scipy/numpy
...d easier to use numpy.digitize():
import numpy
data = numpy.random.random(100)
bins = numpy.linspace(0, 1, 10)
digitized = numpy.digitize(data, bins)
bin_means = [data[digitized == i].mean() for i in range(1, len(bins))]
An alternative to this is to use numpy.histogram():
bin_means = (numpy.hist...
Pythonic way to find maximum value and its index in a list?
...
Sven MarnachSven Marnach
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Where can I find the TypeScript version installed in Visual Studio?
...
I just installed typescript v1.8.6 and this still reads v1.8.36. It is also the latter version in Tools -> Extensions and Updates. So not a good indication if you want to know that you are using the latest version for your project.
...
What are the rules for the “…” token in the context of variadic templates?
...;... x<T1&,U1>, ..., x<Tn&,Un>
func(5,vs)... func(5,v1), ..., func(5,vn)
Expansion proceeds inwards outwards. When expanding two lists in lock-step, they have to have the same size.
More examples:
gun(A<Ts...>::hun(vs)...);
Expands all Ts in the template argument l...
List comprehension: Returning two (or more) items for each item
...ch is marginally faster than using double list comprehension.
nums = range(100000)
def double_comprehension():
return [func(x) for x in nums for func in (f,g)]
def list_extend():
result = []
extend = result.extend
for x in nums:
extend((f(x),g(x)))
return result
%timei...
Python Progress Bar
...t time
In [2]: from tqdm import tqdm_gui
In [3]: for i in tqdm_gui(range(100)):
....: time.sleep(3)
But be careful, since tqdm_gui can raise a TqdmExperimentalWarning: GUI is experimental/alpha, you can ignore it by using warnings.simplefilter("ignore"), but it will ignore all warnings i...
BLE（二）信道&数据包&协议栈格式 - 创客硬件开发 - 清泛IT社区，...
...采集。
这些信息往往都很简单，如温度、湿度、速度、位置信息、电量、水压、等等。
采集的过程也很简单，节点设备定时的向中心设备汇报信息数据，或者，中心设备在需要的时候主动查询。
基于信息采集的需求，BLE抽象...
How to do a case sensitive search in WHERE clause (I'm using SQL Server)?
...ne like this:
SELECT *
FROM Users
WHERE
CAST(Username as varbinary(100)) = CAST(@Username as varbinary))
AND CAST(Password as varbinary(100)) = CAST(@Password as varbinary(100))
AND Username = @Username
AND Password = @Password
...