Question

我有一个哈希：

{:userdata=>["field: email,start: 0,end: 0"]}

我想添加另一个看起来像这样的哈希：

{:userdata=>["field: resource.attributes.account_source.iban,start: 0,end: 0", "field: resource.attributes.account_source.person_name,start: 0,end: 0", "field: resource.attributes.account_target.iban,start: 0,end: 0", "field: resource.attributes.account_target.person_name,start: 0,end: 0"], :iddata=>["field: resource.attributes.account_source.account_id,start: 0,end: 0", "field: resource.attributes.account_source.person_id,start: 0,end: 0", "field: resource.attributes.account_target.account_id,start: 0,end: 0", "field: resource.attributes.account_target.person_id,start: 0,end: 0"], :infodata=>["field: resource.attributes.reason,start: 0,end: 0"], :balancedata=>["field: resource.attributes.amount,start: 0,end: 0"]}

第二个哈希值和数组中有多个键，所以我需要在正确的位置添加值，这应该是这样的：

 {:userdata=>["field: resource.attributes.account_source.iban,start: 0,end: 0", "field: resource.attributes.account_source.person_name,start: 0,end: 0", "field: resource.attributes.account_target.iban,start: 0,end: 0", "field: resource.attributes.account_target.person_name,start: 0,end: 0", "field: email,start: 0,end: 0"], ....

第二个散列更复杂，可能包含我试图＆＃34;合并＆＃34;的散列的相同键。但当然缺少值，这就是我想在第二个哈希中添加的内容。

Answer 1

您可以将Hash#merge与块一起使用，并使用Array#|来获取两个数组的并集：

h1 = { userdata: ['field: email,start: 0,end: 0'] }
h2 = { userdata: ['field: resource.attributes.account_source.iban,start: 0,end: 0', 'field: resource.attributes.account_source.person_name,start: 0,end: 0', 'field: resource.attributes.account_target.iban,start: 0,end: 0', 'field: resource.attributes.account_target.person_name,start: 0,end: 0'], iddata: ['field: resource.attributes.account_source.account_id,start: 0,end: 0', 'field: resource.attributes.account_source.person_id,start: 0,end: 0', 'field: resource.attributes.account_target.account_id,start: 0,end: 0', 'field: resource.attributes.account_target.person_id,start: 0,end: 0'], infodata: ['field: resource.attributes.reason,start: 0,end: 0'], balancedata: ['field: resource.attributes.amount,start: 0,end: 0'] }

h3 = h1.merge(h2) { |_, old_array, new_array| new_array | old_array | }
# {:userdata=>["field: resource.attributes.account_source.iban,start: 0,end: 0", "field: resource.attributes.account_source.person_name,start: 0,end: 0", "field: resource.attributes.account_target.iban,start: 0,end: 0", "field: resource.attributes.account_target.person_name,start: 0,end: 0", "field: email,start: 0,end: 0"], :iddata=>["field: resource.attributes.account_source.account_id,start: 0,end: 0", "field: resource.attributes.account_source.person_id,start: 0,end: 0", "field: resource.attributes.account_target.account_id,start: 0,end: 0", "field: resource.attributes.account_target.person_id,start: 0,end: 0"], :infodata=>["field: resource.attributes.reason,start: 0,end: 0"], :balancedata=>["field: resource.attributes.amount,start: 0,end: 0"]}

请注意，:userdata和'userdata'不是相同的Ruby对象，并且不被认为是哈希中的相同键。

最后，哈希值中的值不是哈希值，而是字符串数组。具有相同字段但不同值的两个字符串将被视为完全不同：

['field: a'] | ['field: a, value: 1']
# ["field: a", "field: a, value: 1"]

如果您想要哈希的功能，请使用Hash。

如何使用Ruby将哈希值中的值附加到另一个哈希值

1 个答案: