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When to use symbols instead of strings in Ruby?
... is to use symbols every time you need internal identifiers. For Ruby < 2.2 only use symbols when they aren't generated dynamically, to avoid memory leaks.
Full answer
The only reason not to use them for identifiers that are generated dynamically is because of memory concerns.
This question is...
For each row in an R dataframe
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You can try this, using apply() function
> d
name plate value1 value2
1 A P1 1 100
2 B P2 2 200
3 C P3 3 300
> f <- function(x, output) {
wellName <- x[1]
plateName <- x[2]
wellID <- 1
print(paste(wellID, x[3], x[4], sep=","))
cat...
Regular expression matching a multiline block of text
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answered Feb 25 '09 at 20:06
Alan MooreAlan Moore
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Visual Studio popup: “the operation could not be completed”
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241
Have you tried to delete the Your_Solution_FileName.suo file?
The .suo file should be in th...
iPhone hide Navigation Bar only on first page
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edited Jun 24 '16 at 9:35
Mohammad Zaid Pathan
13.7k55 gold badges7878 silver badges108108 bronze badges
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Will console.log reduce JavaScript execution performance?
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edited May 2 '18 at 12:20
answered Jul 11 '12 at 5:50
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AngularJs ReferenceError: $http is not defined
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answered Dec 7 '12 at 8:12
ŁukaszBachmanŁukaszBachman
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Comment the interface, implementation or both?
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answered Apr 17 '09 at 9:27
Neeme PraksNeeme Praks
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WPF: How to programmatically remove focus from a TextBox
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152
in .NET Framework 4 just Keyboard.ClearFocus();
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