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Where are environment variables stored in registry?
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283
Here's where they're stored on XP through Server 2012 R2:
User Variables
HKEY_CURRENT_USER\E...
COUNT DISTINCT with CONDITIONS
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ntalbsntalbs
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“Width equals height” constraint in Interface Builder
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3 Answers
3
Active
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Does const mean thread-safe in C++11?
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132
I hear that const means thread-safe in C++11. Is that true?
It is somewhat true...
This is wh...
What is the optimal Jewish toenail cutting algorithm?
...mport ifilter, permutations
validseqs = ifilter(isValid, permutations([1,2,3,4,5]))
for i in validseqs:
print i
(1, 3, 5, 2, 4)
(1, 4, 2, 5, 3)
(2, 4, 1, 3, 5)
(2, 4, 1, 5, 3)
(2, 5, 3, 1, 4)
(3, 1, 4, 2, 5)
(3, 1, 5, 2, 4)
(3, 5, 1, 4, 2)
(3, 5, 2, 4, 1)
(4, 1, 3, 5, 2)
(4, 2, 5, 1, 3)
(4, 2, ...
Error in : object of type 'closure' is not subsettable
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library(shiny)
reactive_df <- reactive({
data.frame(col1 = c(1,2,3),
col2 = c(4,5,6))
})
While we often work with reactive expressions in shiny as if they were data frames, they are actually functions that return data frames (or other objects).
isolate({
print(reactiv...
How to prevent http file caching in Apache httpd (MAMP)
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321
+50
Tried t...
Why does the indexing start with zero in 'C'?
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Keith Thompson
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answered Sep 6 '11 at 13:29
Massimiliano Pel...
Linux bash: Multiple variable assignment
...First thing that comes into my mind:
read -r a b c <<<$(echo 1 2 3) ; echo "$a|$b|$c"
output is, unsurprisingly
1|2|3
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Node.js - Find home directory in platform agnostic way
Process.platform returns "win32" for Windows. On Windows a user's home directory might be C:\Users[USERNAME] or C:\Documents and Settings[USERNAME] depending on which version of Windows is being used. On Unix this isn't an issue.
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