按单独散列中的值对数组进行排序

时间:2014-03-10 21:29:16

标签: ruby arrays sorting

我有一个哈希映射数组索引来排序值,例如

{0=>"item_ss", 1=>"item_hsj", 2=>"item_skls"}

我有一个单独的数组line_item_id和相关的line_items(制表符分隔),如下所示:

["item_skls \t sim1\t99\n", "item_ss \t sim2\t54\n", "item_hsj \t sim3\t48\n"]

如何使用散列值作为标识符和键作为数组的索引对数组进行排序?

例如,我希望上面的数组按如下方式排序:

["item_ss \t sim2\t99\n", "item_hsj \t sim3\t54\n", "item_skls \t sim1\t48\n"]

2 个答案:

答案 0 :(得分:2)

a = ["item_skls \t sim1\t99\n", "item_ss \t sim2\t54\n", "item_hsj \t sim3\t48\n"]
h = {0=>"item_ss", 1=>"item_hsj", 2=>"item_skls"}

puts a.sort_by.with_index{ |v,i| h[i] }
#=> item_ss      sim2   54
#=> item_hsj     sim3   48
#=> item_skls    sim1   99

答案 1 :(得分:0)

我会做

hash = {0=>"item_ss", 1=>"item_hsj", 2=>"item_skls"}
array = ["item_skls \t sim1\t99\n", "item_ss \t sim2\t54\n", "item_hsj \t sim3\t48\n"]
array.sort_by { |s| hash.find { |_,v| s.starts_with? v }.first }
# => ["item_ss \t sim2\t54\n",
#     "item_hsj \t sim3\t48\n",
#     "item_skls \t sim1\t99\n"]