ruby​​：如何在数组中的某个键的值为0时删除散列？

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}] 

现在我想如果"a" == 0删除的项目，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

你也可以使用Array#delete_if

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

Answer 3

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