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【Ruby】any?メソッドの使い方

Posted at

個人メモです。

any?メソッドを使うことで、対象のオブジェクトの中に該当する要素が一つでもあればtrueを返す

オブジェクト.any?{ |変数| 条件式 }


**ブロック`{}`を省略した場合は、対象のオブジェクトの中に値が存在すればtrueを返す**。

オブジェクト.any?


##ブロックありの場合

▼trueの事例

true1
arr = [1, 2, 3]

arr.any?{|x| x < 2}
=> true

▼falseの事例

false1
arr = [1, 2, 3]

arr.any?{|x| x > 10}
=> false

##ブロックなしの場合

▼trueの事例

true1
arr = [1, 2, 3]

arr.any?
=> true
true2
arr = [nil, 2, nil]

arr.any?
=> true

**▼falseの事例**
false1
arr3 = []

arr3.any?
=> false
false2
arr4 = [nil, nil, nil]

arr4.any?
=> false
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