ruby：如果数组中一个键的值为0，如何删除哈希？

Question

例如，我有一个这样的数组：

array = [{"a"=>0, "b"=>1, "c"=>2}, {"a"=>2, "b"=>1, "c"=>0}, {"a"=>3, "b"=>1, "c"=>2}]

现在我要删除"a" == 0项，返回：

array = [{"a"=>2, "b"=>1, "c"=>0}, {"a"=>3, "b"=>1, "c"=>2}]

怎么办？

Answer 1

使用Array#reject：

array.reject { |h| h["a"] == 0 }
#=> [{"a"=>2, "b"=>1, "c"=>0}, {"a"=>3, "b"=>1, "c"=>2}]

Answer 2

array.collect {|k| k unless k["a"] == 0}.compact  

Answer 3

您也可以使用Array#delete_if

array.delete_if {|h| h["a"] == 0}