Zimu Liu zimuliu
zimuliu
/ nested_attributes_sync.rb
Last active
June 30, 2021 12:37
#accepts_nested_attributes_sync_for: Instead of manually specifying _destroy: true for deletion, or id for update, it supports synchronizing an association, with respect to the given unique index in the association.
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| module Concerns | |
| module NestedAttributesSync | |
| extend ActiveSupport::Concern | |
| included do | |
| class_attribute :nested_attributes_sync_options, instance_writer: false | |
| self.nested_attributes_sync_options = {} | |
| end | |
| class_methods do |
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| #include <iostream> | |
| #include <set> | |
| #include <vector> | |
| int countUnique(const std::vector<std::string> &a) { | |
| std::set<std::string> uniqueStrings; | |
| for (std::vector<std::string>::const_iterator itr = a.begin(); itr != a.end(); itr++) { | |
| if (uniqueStrings.end() == uniqueStrings.find(*itr)) { | |
| uniqueStrings.insert(*itr); | |
| } |
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| bool all_done = false; | |
| for (int i = 0; i < 100; i ++) { | |
| for (int j = 0; j < 100; j ++) { | |
| if (i * j == 81) { | |
| all_done = true; | |
| break; | |
| } | |
| } | |
| if (all_done) { |