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Is it possible to Pivot data using LINQ?
...).Sum(c => c.Qty),
March = g.Where(c => c.OrderDate.Month == 3).Sum(c => c.Qty)
});
GroupBy in Linq does not work the same as SQL. In SQL, you get the key and aggregates (row/column shape). In Linq, you get the key and any elements as children of the key (hierarchical shape)...
How do I run a Python program in the Command Prompt in Windows 7?
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23 Answers
23
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How can I run MongoDB as a Windows service?
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Ry-♦
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answered Mar 13 '10 at 14:58
Stephen CurranStephen Curran
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How to get key names from JSON using jq
...x", "Manifest-Version" : "1.0", "appname" : "testApp", "build-date" : "02-03-2014-13:41", "version" : "testBox" }
$ jq 'keys' file.json
[
"Archiver-Version",
"Build-Id",
"Build-Jdk",
"Build-Number",
"Build-Tag",
"Built-By",
"Created-By",
"Implementation-Title",
"Implementation-Ven...
Test if a vector contains a given element
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answered Jul 23 '09 at 2:25
medriscollmedriscoll
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What Haskell representation is recommended for 2D, unboxed pixel arrays with millions of pixels?
...e indexing.
In Repa, your triple of shorts would have the type:
Array DIM3 Word16
That is, a 3D array of Word16s.
For bitonal images I will need to store only 1 bit per pixel.
UArrays pack Bools as bits, Vector uses the instance for Bool which does do bit packing, instead using a representatio...
Installing Ruby Gem in Windows
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73
I recommend you just use rubyinstaller
It is recommended by the official Ruby page - see https:...
Get class that defined method
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Aaron Hall♦
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answered Jun 7 '09 at 2:23
Alex MartelliAlex Martelli
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What happens if I define a 0-size array in C/C++?
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Keith Thompson
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answered Mar 15 '12 at 15:38
LundinLundin
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Reshaping data.frame from wide to long format
...:
reshape(d,
direction = "long",
varying = list(names(d)[3:7]),
v.names = "Value",
idvar = c("Code", "Country"),
timevar = "Year",
times = 1950:1954)
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