在Ruby中以排序方式累积数据

Question

我想存储与密钥相关的三元组数据。我有这种形式的三元组：

"data1" "data2"  "data3"

其中data1是一个整数。我有一个三倍于密钥的机制。例如，"key1"映射到

["data1", "data2", "data3"]

可以有多个与密钥相关联的三元组。例如，[4, "data2", "data3"], [1, "data5", "data6"] and [3, "data8", "data9"]可能会映射到"key1"。我希望这些三元组按"data1"字段排序并映射。在这种情况下，

"key1" =>  {[1, "data5", "data6"] [3, "data8", "data9"] [4, "data2", "data3"]}

我如何做这个Ruby？

Answer 1

您可以执行以下操作：

hsh = {"key1" => [[4,"data2","data3"], [1, "data5","data6"],[3, "data8","data9"]] }
hsh.each{|k,v| hsh[k]=v.sort_by(&:first)}
p hsh
# >> {"key1"=>[[1, "data5", "data6"], [3, "data8", "data9"], [4, "data2", "data3"]]}

如果您不想更新源哈希，请使用#dup。

hsh = {"key1" => [[4,"data2","data3"], [1, "data5","data6"],[3, "data8","data9"]] }
hsh1 = hsh.dup
hsh1.each{|k,v| hsh1[k]=v.sort_by(&:first)}
p hsh1
# >> {"key1"=>[[1, "data5", "data6"], [3, "data8", "data9"], [4, "data2", "data3"]]}