Ruby TypeError: no implicit conversion of String into Integer

Question

我正在尝试查找我的 data 中是否有 mango/cc:，如果它在那里更新它的值到 new_version，如果它不在那里添加 mango/cc:#{new_version}

我的data

{"product"=>"fruit", "id"=>"alpha", "details"=>{"SS"=>["mango/aa:50", "mango/cc:287_457_51.0.0"]}}

代码：

  new_version = "287_457_53.0.0"
  var1 = data['details']['SS'].select{|x| x.start_with?('mango/cc:')}
  if var1.empty?
    data['details'] << "mango/cc:#{new_version}"
  else
    data['details'].delete(var1)
    data['details'] << "mango/cc:#{new_version}"
    puts data

当前输出：

`[]': no implicit conversion of String into Integer (TypeError)

预期输出：

{"product"=>"fruit", "id"=>"alpha", "details"=>{"SS"=>["mango/aa:50", "mango/cc:287_457_53.0.0"]}}

Answer 1

我认为错误是因为 var1 是一个数组，所以你的代码必须是这样的：

new_version = "287_457_53.0.0" 
var1 = data['details']['SS'].select{|x| x.start_with?('mango/cc:')}
if var1.empty?
  data['details'] << "mango/cc:#{new_version}"
else
  data['details'].delete(var1.first)
  data['details'] << "mango/cc:#{new_version}"
  puts data

只是更改 data['details'].delete 方法中的参数

Answer 2

所以它应该有效：

data={"product"=>"fruit", "id"=>"alpha", "details"=>{"SS"=>["mango/aa:50", "mango/cc:287_457_51.0.0"]}}
puts "Before: #{data}"
new_version = "287_457_53.0.0"
var1 = data['details']['SS'].select{|x| x.start_with?('mango/cc:')}
if var1.empty?
  data['details']['SS'] << "mango/cc:#{new_version}"
else
  data['details']['SS'].delete(var1.first)
  data['details']['SS'] << "mango/cc:#{new_version}"
end
puts "After: #{data}"

#=> Before: {"product"=>"fruit", "id"=>"alpha", "details"=>{"SS"=>["mango/aa:50", "mango/cc:287_457_51.0.0"]}}
#=> After: {"product"=>"fruit", "id"=>"alpha", "details"=>{"SS"=>["mango/aa:50", "mango/cc:287_457_53.0.0"]}}

有几个错误：

 var1 is an array
 data ['details'] is hash table
 "mango / cc: # {new_version}" is a string

您应该添加 ['SS'] 以删除键（字符串）"mango / cc: # {new_version}" 记住 var1 是数组而不是字符串

Ruby TypeError: no implicit conversion of String into Integer

Ruby TypeError: no implicit conversion of String into Integer

ruby

ruby-on-rails-3