オブジェクト型（Developer Conference 2018より）

Transcript

1. Object is not JSON by Laurent Esnault JSON JSON !?
2. JSON != is not
3. / 好 理由 Inspired 不要 類別 名前 追加
4. 対 制約 •OB Get (object ; propertyName {; type}) •object.propertyName •object[propertyName] •WP GET ATTRIBUTES
5. 4D Write Pro 4 ⽅法 Four Different ways to Use Objects with 4D Write Pro! https://blog.4d.com/four-different-ways-to-use-objects-with-4d-write-pro/
6. C_OBJECT 変数  変数 値 変数 値 値 $myObject $myObject reference != is not
7. 参照 $myObject:=$otherObject $myObject:=New object $otherObject:=New object $myObject reference1 $otherObject reference2 $myObject reference2 $otherObject reference2 変数 代⼊ 参照
8. BLOB TO VARIABLE ($blob ; a.b.c) ->a.b.c  変数 != is not × ×
9. OB SET 特殊性 •OB SET ($myObject ; "code" ; 1) 変数 •OB SET (myGetObject() ; "code" ; 1) 値 reference reference OB SET 新規 $myObject.code:=1
10. Null Undefined Undefined 存4 Undefined Null 存4 値 知 C_OBJECT, C_COLLECTION C_POINTER Null • : Undefined Null Undefined • If (a.b = Null) Null 状態 値 ,数
11. 未定義 怖 良 理由 Don’t be Afraid of Undefined Values https://blog.4d.com/object-notation-improvement-after-customer-feedback/
12. 循環
13. 循環 / v16# BLOB v17# BLOB v17#
14. / Null Undefined $0.value:=$1.value+$2.value $0->:=$1->+$2->
15. Non-JSON znƒ BLOB# Integer# Date# 16R6 String type with time zone:1 String type without time zone:0 Date type:2 !2018-10-22! "2018-10-22" "2018-10-21T15:00:00.000Z" "2018-10-22T00:00:00.000Z" Stringify:
16. Non-JSON znƒ BLOB# Integer# Date# 16R6 Time# v17 Pointer# Stringify: Image# Stringify: [object Picture] ORDA# Stringify: [object DataStore] [object Entity] [object EntityCollection] Write Pro View Pro# Stringify:
17. JSON εΩʔϚ JSON Parse JSON Validate DTD XSD SET ARRAY/OB GET ARRAY
18. C_COLLECTION OB SET ARRAY/OB GET ARRAY
19. 配列 એݴͱఆٛ ARRAY TEXT($arr;n) C_COLLECTION($col) $col:=New collection λΠϓ ⼀律 混4 ୅ೖ $arr{$i}:="hello" $col[$i]:="hello" αΠζ Size of array($arr) $col.length ఴࣈ 0 ·ͨ͸ 1 ͔ΒSize of array ·Ͱ 0 length-1 C_COLLECTION
20. Inspired copy concat combine count clear query reduce orderByMethod pop remove push sum sort unshift some slice reverse shift resize map join min max orderBy lastIndexOf indices indexOf find filter insert findIndex extract every distinct equal fill countValues average
21. 追加# 削除# 並 替 # 計算# ⽐較# 複製 挿⼊# 検索# 取 出 # ⽂字列変換# Inspired extract map some every indices indexOf find filter query join Split string copy concat combine slice distinct equal count sum average min max reduce orderBy orderByMethod sort reverse pop shift remove clear push insert unshift resize fill countValues lastIndexOf findIndex
22. ⼤幅 拡張 管理 https://blog.4d.com/a-wide-range-of-possibilities-to-manage-your-collections/ A Wide Range of Possibilities to Manage your Collections
23. For each = For ($i;0;$collection.length-1) MESSAGE($collection[$i]) End for
24. For each = For each ($element;$collection) MESSAGE($element) End for each For ($i;0;$collection.length-1) MESSAGE($collection[$i]) End for
25. For each = = For each ($propertyName;$object) MESSAGE($propertyName) End for each
26. For each = = = For each ($entity;$entitySelection) MESSAGE($entity.name) End for each
27. For each = = = For each ($element;$collection) While($element#"") MESSAGE($element) End for each
28. For each = = = For each ($element;$collection) Until($element="") MESSAGE($element) End for each