Hungarian notation: what changed

Revision 1 to 2. Removed lines have a minus sign; added lines have a plus sign.

Old	New		Line
1	1		Hungarian notation in a coding style adopted by MS for C development under Windows. This variable naming technique claims to harmonize, to improve the readability of the existing variables, so to save time. Here is an example list, neither official nor fixed (the prefixes are usually based on the information theory, which concludes that consonants can be inferred in the middle of vowels. It uses too, the Camel case notation a lot). The name refection tool is perfect to use this technique easily.
2	2
3		-	\
4		-	\
5		-	\
6	3		[[Miscellaneous types:]]\
7	4
8	5		F Property Variable
9	6		T Type
10	7		P Type of pointer to another type
11	8		On Event
12	9
13	10		[[Basic types:]]\
14	11
15	12		b Boolean
16	13		c Char
17	14		s String
18	15		d for all reals\floats as Double, Extended, ...
19	16		i for all integers as Integer, Long Integer, Smallint, ...
20	17		p Generic Pointer
21	18		pz PChar
22	19		...\...
23	20
24	21		[[Published name (controls):]]\
25	22
26	23		btn TButton; ex.: btnFoo1
27	24		bbtn TBitmap Button
28	25		optbtn TOption Button
29	26		sbtn TSpeedButton
30	27		chk TCheck Box
31	28		cbx TComboBox
32	29		db TDatabase
33	30		dts TDataSource
34	31		edt TEdit Box
35	32		frm TForm
36	33		grd TDrawGrid
37	34		sgrd TString Grid
38	35		dbgrd TDBGrid
39	36		img Image
40	37		itm TMenuItem
41	38		lbl TLabel
42	39		lbx TListbox2
43	40		dblbx TDBListbox
44	41		mnu TMainMenu
45	42		pmnu TPopup Menu
46	43		mem TMemo
47	44		notbk TNotebook
48	45		tabs TTabset
49	46		tabnotbk Tabbed Notebook
50	47		hdr THeader
51	48		stb TStatusBar
52	49		outl TOutline
53	50		pnl TPanel
54	51		tbl TTable
55	52		qry TQuery
56	53		timr Timer
57	54		fld TField
58	55		inif TIniFile
59	56		...\...
60	57
61	58		[[Components \ Objects:]]
62	59
63	60		cmp TComponent
64	61		oSL TStringList; ex.: oSLfoo
65	62		oStrm TStream; ex.: oStrmFoo
66	63		...\...
67	64
68	65		[[Miscellaneous notable scope:]]\
69	66
70	67		g means Global, wheras its type (simple or object)
71	68
72	69		[[Memory scope management:]]\
73	70
74	71		o means, from a memory scope management, that oMyObj must be freed within the scope of its declaration; ex.: oMyObject; ex.: goMyObject
75	72		o_ means, from a memory scope management, that o_myObj must not be freed here, i.e. must not be freed in the scope of its declaration, but elsewhere, in a remote scope, where there is an statement declaration of oMyObj, which is the one where this object was created!; ex: o_myObj
76	73
77	74		[[Constants:]]\
78		-	\
	75	+
79	76		Constants are often written in uppercase ( like in C):
80	77
81	78		const LF_WINDOWS = #13#10;
82	79		const LF_LINUX = #10;
83	80
84	81		Another notation could consist of mixing a lowercase c - for constant - followed by its basic type:
85	82
86	83		const ciIndex = 1;
87	84		const csPathHome = '/home';
88	85		const ccNull = #0
89	86		...\...
90	87
91	88		---
92	89		From the Free Pascal wiki, page "Hungarian notation", as it stood on 2020-11-12 after a change by Eric69, out of the wiki's dump of 2024-05-26. Copyright stays with the author who wrote it, according to the old wiki's [[Licensing]] page. If you have concerns about this material, [message the admin](/wiki-contact).

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