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n.times.xxx の構文

Ruby

Posted at 2025-04-16

n.times.map

例：0から4までの数を２倍した配列を作る

result = 5.times.map{ |i| i * 2 }
p result 
# [0, 2, 4, 6, 8]

n.times.sum

例：0から9までの合計を求める

sum = 10.times.sum{|i| i}
puts sum 
 #  45

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