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Given :
a=true
b=false
why can I do :
puts [a && b, a || b] #[false, true]
but not
puts [a and b, a or b]
syntax error, unexpected keyword_and, expecting ‘]’
puts [a and b, a or b]
Apparently, the operator precedence for the comma is higher than “and” but lower than &&.
Putting parenthesis around the elements works: