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How to escape a pipe char in a code statement in a markdown table?
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Get commit list between tags in git
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answered May 2 '11 at 23:08
manojldsmanojlds
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Mixins vs. Traits
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This code will raise conflict (two definitions of foo():void).
ad 3.
The semantics of a method does not depend of whether it is defined in a trait or in a class that uses the trait.
In other words, it does not matter wheter the class consists of the Traits or the Traits code is "copy - pas...
MySQL CONCAT returns NULL if any field contain NULL
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answered Apr 1 '13 at 10:01
John WooJohn Woo
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error: Libtool library used but 'LIBTOOL' is undefined
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A good answer for me was to install libtool:
sudo apt-get install libtool
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How do you use window.postMessage across domains?
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Using bitwise OR 0 to floor a number
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How does it work? Our theory was that using such an operator casts the
number to an integer...
How to interactively (visually) resolve conflicts in SourceTree / git
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How to count TRUE values in a logical vector
...m(z) # gives you NA
table(z)["TRUE"] # gives you 1
length(z[z == TRUE]) # f3lix answer, gives you 2 (because NA indexing returns values)
So I think the safest is to use na.rm = TRUE:
sum(z, na.rm = TRUE) # best way to count TRUE values
(which gives 1). I think that table solution is less effici...