This document presents a key-value store library called XLS_KVS that allows storing and editing key-value pairs in a Microsoft Excel workbook for local environments. The library uses Ruby and the Excel COM API to interact with Excel workbooks, allowing values to be stored, retrieved, updated, and deleted directly from Excel in an easy-to-use manner. The library is designed to integrate Ruby with a familiar tool like Excel to provide a key-value data store that can be edited directly.

1. “Good for you. Good for me. Mmm, good.”
Key-Value Store
For Local Environment
誰でも使える技術で使える
ローカル環境向け
Key-Value Store
こしば としあき

2. most
important

3. most important
Good for you. Good for me.
Mmm, good.
俺に良し
お前に良し
みんなに良し

4. about me

5. about me
TOSHIAKI
koshiba
こしば としあき
twitter:bash0C7
hatenaid:bash0C7

6. about me
• RubyKaigi2009 実行委員
– 受付/オペレーション担当
• 東京Ruby会議01 スピーカー
– 「オフィスで踏み出すRubyの世界」

7. about me
• 最近の趣味
– プロジェクトを設計すること
• 昼の仕事
– ソフトウェア開発
• 金融業/運輸業 適用業務システム開発
–IBM COBOL on CICS
–MFCOBOL on MTP
–RPG on AS/400
• その他、Web、開発ツール開発
– 社員の提案・不満の収集窓口

8. about me
•IBM COBOL on CICS
•MFCOBOL on MTP
•RPG on AS/400

9. outline

10. outline
Ruby Script User
This KVS Rich Client(GUI)
Entity Layer
local file

11. requirement

12. requirement
• store hash
• business person integrate
• on memory running
• without Web Application
• max_size < 1,000,000

13. design

14. design
This KVS
Rich Client(GUI)
API
<<Entity>>
middle ware
local file

15. implement

16. implement
concealed
This KVS Class Internal processing
XLS_KVS
<<Presentation>>
Win32OLE
Microsoft Excel
COM API
<<Entity>>
Microsoft Excel
Excel Workbook

17. Microsoft Excel
Entity & Presentation

18. feature

19. feature
• store key-value
• on memory running
• edit stored values

20. store
key-values

21. store key-value
defined same method as "Hash"
–[](key)
–store(key, value)
–delete(key)

22. store key-value – find(1)
YAML.load(
@app.WorksheetFunction.VLookup
(YAML.dump(key),
@sheet.Range(KEYVALUE_COLS), 2, false ))

23. store key-value – find(2)
@sheet.range(KEY_COLS).Find(YAML.dump(key),
@app.ActiveCell,
-4163, #xlValues,
1, #xlWhole,
1, #xlByRows,
1, #xlNext,
true,
false)

24. store key-value – insert
get tail row offset in worksheet
max_row =
@sheet.UsedRange.Row +
@sheet.UsedRange.Rows.count
@sheet.range("A#{max_row}").value =
YAML.dump(key)
@sheet.range("B#{max_row}").value =
YAML.dump(value)

25. store key-value – update
range = find(key)
range.offset(0, 1).value = YAML.dump(value)

26. store key-value - delete
target_row = find(key).Row
sheet.Range("#{target_row}:#{target_row}").Delet
e (-4162)

27. on memory
running

28. on memory running
• if call XLS_KVS#new
–create XLS_KVS::Hash instance
–lunch Microsoft Excel
• if call XLS_KVS::Hash#Close
–save&close Excel Workbook
–unload Microsoft Excel

29. edit
stored values

30. edit stored values
kvs = XLS_KVS.load(@xls_file, 1, false)
kvs.store(1, [Time.now, 'new running', 19])
kvs.store(2, [Time.now, 'I am Koshiba', 9])
kvs.store(3, self)

31. edit stored values
kvs = XLS_KVS.load(@xls_file, 1, false)
kvs.store(1, [Time.now, 'new running', 19])
kvs.store(2, [Time.now, 'I am Koshiba', 9])
kvs.store(3, self)
edit directly!

32. edit stored values
kvs = XLS_KVS.load(@xls_file, 1, false)
kvs.store(1, [Time.now, 'new running', 19])
Excel is useful
kvs.store(2, [Time.now, 'I am Koshiba', 9])
for many people!
kvs.store(3, self)
edit directly!
engineers,
business persons
students,
my mother, etc

33. edit stored values
Microsoft Excel is
many people's friend

34. summary

35. summary
• Ruby is programmer's friend

36. summary
• Ruby is programmer's friend
• Excel is many people's friend

37. summary
• Ruby is programmer's friend
• Excel is many people's friend
•Ruby × Excel =
everyone's friend

38. "everyone's friend"
Ruby × Excel
XLS_KVS
Key-Value Store Library
coming soon!

39. Thank you
for
listening.
ご清聴ありがとうございました