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Rails 配列からnil,空文字を取り除く 配列の結合

Last updated at Posted at 2021-06-16

###配列からnil,空文字を取り除きたい時

.reject(&:blank?)

###配列を結合したい時

a = ["apple", "banana", "orange"]
b = ["grape", "apple", "orange"]
a | b
=> ["apple", "banana", "orange", "grape"]

###+を使った場合

a = ["apple", "banana", "orange"]
b = ["grape", "apple", "orange"]
a + b
=> ["apple", "banana", "orange", "grape", "apple", "orange"]
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