Ruby 排序嵌套散列错误“；can'；t将符号转换为整数“；

我不明白为什么会失败

1.9.3p0 :022 > hash = Hash.new
 => {} 
1.9.3p0 :023 > hash["jon"] = [:name=>"jon",:age=>22]
 => [{:name=>"jon", :age=>22}] 
1.9.3p0 :024 > hash["bob"] = [:name=>"bob",:age=>19]
 => [{:name=>"bob", :age=>19}] 
1.9.3p0 :025 > hash["sid"] = [:name=>"sid",:age=>25]
 => [{:name=>"sid", :age=>25}] 
1.9.3p0 :026 > hash
 => {"jon"=>[{:name=>"jon", :age=>22}], "bob"=>[{:name=>"bob", :age=>19}], "sid"=>[{:name=>"sid", :age=>25}]} 
1.9.3p0 :027 > hash.sort_by { |k, v| v[:age] }
TypeError: can't convert Symbol into Integer
    from (irb):27:in `[]'
    from (irb):27:in `block in irb_binding'
    from (irb):27:in `each'
    from (irb):27:in `sort_by'
    from (irb):27
    from /usr/share/ruby-rvm/rubies/ruby-1.9.3-p0/bin/irb:16:in `<main>'
1.9.3p0 :028 > hash.sort_by { |k, v| v[:age].to_i }
TypeError: can't convert Symbol into Integer
    from (irb):28:in `[]'
    from (irb):28:in `block in irb_binding'
    from (irb):28:in `each'
    from (irb):28:in `sort_by'
    from (irb):28
    from /usr/share/ruby-rvm/rubies/ruby-1.9.3-p0/bin/irb:16:in `<main>'
1.9.3p0 :029 >

1.9.3p0:022>hash=hash.new
=> {} 
1.9.3p0:023>散列[“jon”]=[：name=>“jon”，：age=>22]
=>[{:name=>“jon”，:age=>22}]
1.9.3p0:024>散列[“bob”]=[：name=>“bob”，：age=>19]
=>[{:name=>“bob”，:age=>19}]
1.9.3p0:025>散列[“sid”]=[：名称=>“sid”，：年龄=>25]
=>[{:name=>“sid”，:age=>25}]
1.9.3p0:026>散列
=>{“jon”=>[{：姓名=>“jon”，：年龄=>22}]，“bob”=>[{：姓名=>“bob”，：年龄=>19}]，“sid”=>[{：姓名=>“sid”，：年龄=>25}]
1.9.3p0:027>hash.sort_by{k，v | v[：age]}
TypeError:无法将符号转换为整数
from（irb）：27:in`[]'
from（irb）：27:in`block in irb_binding'
发件人（irb）：27:在“每个”
发件人（irb）：27:“排序依据”中的
起始（irb）：27
from/usr/share/ruby-rvm/rubies/ruby-1.9.3-p0/bin/irb:16:in`'
1.9.3p0:028>hash.sort_by{k，v|v[：age].to|i}
TypeError:无法将符号转换为整数
from（irb）：28:in`[]'
from（irb）：28:in`block in irb_binding'
发件人（irb）：28:在'each'中
from（irb）：28:in'sort_by'
来自（irb）：28
from/usr/share/ruby-rvm/rubies/ruby-1.9.3-p0/bin/irb:16:in`'
1.9.3p0:029>

本文建议它应该可以工作：

您的语法已关闭

hash["jon"] = [:name=>"jon",:age=>22] 

意味着

hash["jon"] = [{:name=>"jon",:age=>22}]

因此，请将代码更改为：

hash = Hash.new
hash["jon"] = {:name=>"jon",:age=>22}
hash["bob"] = {:name=>"bob",:age=>19}
hash.sort_by { |k, v| v[:age] }

你的语法不正确

hash["jon"] = [:name=>"jon",:age=>22] 

意味着

hash["jon"] = [{:name=>"jon",:age=>22}]

因此，请将代码更改为：

hash = Hash.new
hash["jon"] = {:name=>"jon",:age=>22}
hash["bob"] = {:name=>"bob",:age=>19}
hash.sort_by { |k, v| v[:age] }

---

或者使用

hash.sort_by{k，v | v[0][：age]}

，但您的方式更好。：）或者使用

hash.sort_by{k，v | v[0][：age]}

，但您的方式更好。：）