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Count, size, length…too many choices in Ruby?
...ke an element or predicate and count only those items that match.
> [1,2,3].count{|x| x > 2 }
=> 1
In the case where you don't provide a parameter to count it has basically the same effect as calling length. There can be a performance difference though.
We can see from the source code...
invalid multibyte char (US-ASCII) with Rails and Ruby 1.9
I'm using Ruby 1.9.1 with Rails 2.3.4 My application is to handle text input
6 Answers
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How can I use swift in Terminal?
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edited Oct 21 '14 at 15:25
answered Jun 3 '14 at 9:34
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What is the difference between ui-bootstrap-tpls.min.js and ui-bootstrap.min.js?
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200
So, ui-bootstrap-tpls.min.js == (ui-bootstrap.min.js + HTML templates) required by the JavaSc...
mysql :: insert into table, data from another table?
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INSERT INTO action_2_members (campaign_id, mobile, vote, vote_date)
SELECT campaign_id, from_number, received_msg, date_received
FROM `received_txts`
WHERE `campaign_id` = '8'
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How to replace a character with a newline in Emacs?
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itsjeyd
4,53322 gold badges2525 silver badges4545 bronze badges
answered Mar 4 '09 at 23:52
Jonathan ArkellJonatha...
cannot load such file — zlib even after using rvm pkg install zlib
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201
I ended up installing zlib from apt-get and then reinstalling ruby to not use the rvm director...
How to show SQL queries run in the Rails console?
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254
Rails 3+
Enter this line in the console:
ActiveRecord::Base.logger = Logger.new(STDOUT)
Ra...
Python Pandas merge only certain columns
...nly merge some columns? I have a DataFrame df1 with columns x, y, z, and df2 with columns x, a ,b, c, d, e, f, etc.
5 Answe...
【HarmonyOS】真机测试ble - HarmonyOS NEXT - 清泛IT社区，为创新赋能！
[2:01:15 PM] YAIL[254]: (begin (require <com.google.youngandroid.runtime>) (process-repl-input "P:)R:yv~...
[2:01:15 PM] → SimpleYail 执行
[2:01:15 PM] [YAIL] 解析 YAIL (244 chars)
[2:01:15 PM] [YAIL] 解析得到 1 个顶层表达式
[2:01:15 PM] [YAIL] 执行[0]: (be...