I have an array which contains mixed classes:
arr = ["I", "have", 2, "dimes", "and" , 3, "nickels"]
How do I perform addition on the integers in the array without modifying the strings?
The expected output is,
["I", "have", 3, "dimes", "and" , 4, "nickels"]
def add_to_integers(ary, n)
ary.map { |i| i.is_a?(Integer) ? (i + n) : i }
end
add_to_integers([1, 'foo'], 1)
# => [2, "foo"]
arr.map!{|element| element.is_a?(Integer) ? element + 1 : element}
我认为带有rescue
map
是合适的,因为字符串响应+
并且有许多数字类型。
arr.map { |n| begin; n + 1; rescue TypeError; n; end }
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