ruby – 从Rails中的哈希删除多个键和值对

number = {:a => 1,:b => 2,:c => 3,:d => 4}

在评估某些条件时,我想删除a,b,c的键值对

解决方法

number.delete "A"
number.delete "B"
number.delete "C"

或者,性能较差但更简单：

number.reject! {|k,v| %w"A B C".include? k }