如何在单个列中对多个值使用ILIKE。
这是不使用类似条件的多个值的解决方案：
Project.where(name: ["Arvind Oasis", "Prestige Jindal City"])
在此示例中，它将在我的数据库中进行精确匹配。但我想对所有值进行类似的匹配。
如何为多个值使用ILIKE [“ Arvind Oasis”，“ Rajkumar Jindal City”]
对于单个值，我可以这样使用，
Project.where("name ILIKE ?", "%Prestige Kumar%")
我想从字符串数组中删除一对“重复项”，其中每个元素的形式都R1,R2不同。在我的情况下，重复项是R2,R1因为它具有与相同的元素，R1,R2但取反了。
鉴于：
a = ['R1,R2', 'R3,R4', 'R2,R1', 'R5,R6']
结果数组应如下所示：
a = ['R1,R2', 'R3,R4', 'R5,R6']
如何删除重复项，以便获得以下内容？
list = ["HM00", "HM01", "HM010", "HM011", "HM012", "HM013", "HM014", "HM015", "HM016", "HM017", "HM018", "HM019", "HM02", "HM020", "HM021", "HM022", "HM023", "HM024", "HM025", "HM026", "HM027", "HM028", "HM029", "HM03", "HM030", "HM031", "HM032", "HM033", "HM034", "HM035", "HM036", "HM037", "HM038", "HM039", "HM04", "HM040", "HM041", "HM042", "HM043", "HM044", "HM045", "HM046", "HM047", "HM05", "HM06", "HM07", "HM08", "HM09"]
我希望将结果显示为[“ HM00”，“ HM01”，“ HM002” ...]，但使用排序方法却得到以下结果
["HM00", "HM01", "HM010", "HM011", "HM012", "HM013", "HM014", "HM015", "HM016", "HM017", "HM018", "HM019", "HM02"]
Traceback (most recent call last):
16: from /home/hman01/.rvm/rubies/ruby-2.5.0/bin/irb:11:in `<main>'
15: from /home/hman01/.rvm/rubies/ruby-2.5.0/lib/ruby/2.5.0/irb.rb:381:in `start'
14: from /home/hman01/.rvm/rubies/ruby-2.5.0/lib/ruby/2.5.0/irb.rb:381:in `new'
13: from /home/hman01/.rvm/rubies/ruby-2.5.0/lib/ruby/2.5.0/irb.rb:410:in `initialize'
12: from /home/hman01/.rvm/rubies/ruby-2.5.0/lib/ruby/2.5.0/irb.rb:410:in `new'
11: from /home/hman01/.rvm/rubies/ruby-2.5.0/lib/ruby/2.5.0/irb/context.rb:91:in `initialize'
10: from /home/hman01/.rvm/rubies/ruby-2.5.0/lib/ruby/2.5.0/irb/extend-command.rb:242:in `save_history='
9: from /home/hman01/.rvm/rubies/ruby-2.5.0/lib/ruby/2.5.0/irb/ext/save-history.rb:45:in `save_history='
8: from /home/hman01/.rvm/rubies/ruby-2.5.0/lib/ruby/2.5.0/irb/ext/save-history.rb:21:in `init_save_history'
7: from /home/hman01/.rvm/rubies/ruby-2.5.0/lib/ruby/2.5.0/irb/ext/save-history.rb:21:in `extend'
6: from /home/hman01/.rvm/rubies/ruby-2.5.0/lib/ruby/2.5.0/irb/ext/save-history.rb:65:in `extended'
5: from /home/hman01/.rvm/rubies/ruby-2.5.0/lib/ruby/2.5.0/irb/ext/save-history.rb:75:in `load_history'
4: from /home/hman01/.rvm/rubies/ruby-2.5.0/lib/ruby/2.5.0/irb/ext/save-history.rb:75:in `open'
3: from /home/hman01/.rvm/rubies/ruby-2.5.0/lib/ruby/2.5.0/irb/ext/save-history.rb:76:in `block in load_history'
2: from /home/hman01/.rvm/rubies/ruby-2.5.0/lib/ruby/2.5.0/irb/ext/save-history.rb:76:in `each'
1: from /home/hman01/.rvm/rubies/ruby-2.5.0/lib/ruby/2.5.0/irb/ext/save-history.rb:76:in `block (2 levels) in load_history'
/home/hman01/.rvm/rubies/ruby-2.5.0/lib/ruby/2.5.0/irb/ext/save-history.rb:76:in `<<': string contains null …