Difference between revisions of "NaturalSort"
| Line 18: | Line 18: | ||
= Features = | = Features = | ||
| − | + | ===== 1) Topic enumerators sort till 99 subtopics: ===== | |
1 | 1 | ||
1.1.1 | 1.1.1 | ||
| Line 25: | Line 25: | ||
1.99.99 | 1.99.99 | ||
2 | 2 | ||
| − | + | ===== 2) Integers sort: ===== | |
0 | 0 | ||
00 | 00 | ||
| Line 32: | Line 32: | ||
2 | 2 | ||
10 | 10 | ||
| − | + | ===== 3) Floating point numbers sort: ===== | |
0,99 | 0,99 | ||
1 | 1 | ||
| Line 38: | Line 38: | ||
1,99 | 1,99 | ||
2 | 2 | ||
| − | + | ===== Collated alpha sort: ===== | |
Alpha sorting task made by OS (Windows and Linux). | Alpha sorting task made by OS (Windows and Linux). | ||
| − | + | ===== Thousand separated numbers sort: ====== | |
1.198 | 1.198 | ||
1.199 | 1.199 | ||
| Line 46: | Line 46: | ||
1.200 | 1.200 | ||
1.201 | 1.201 | ||
| − | + | ===== IP addresses: ===== | |
10.145.254.9 | 10.145.254.9 | ||
10.145.255.9 | 10.145.255.9 | ||
Revision as of 21:01, 25 May 2015
About
Natural sort order is an ordering of strings in alphabetical order, except that multi-digit numbers are ordered as a single character. Natural sort order has been promoted as being more human-friendly ("natural") than the machine-oriented pure alphabetical order.
For example, in alphabethical sorting "z11" would be sorted before "z2" because "2" is sorted as smaller than "1", while in natural sorting "z2" is sorted as smaller than "z11" because "2" is sorted as smaller than "11".
Functionality to sort by natural sort order is built into many progamming languages and libraries.
Authors
Antônio Galvão and Rik van Kekem
Platforms
Linux and Windows.
Features
1) Topic enumerators sort till 99 subtopics:
1
1.1.1
1.1.2
1.2.1
1.99.99
2
2) Integers sort:
0
00
000
1
2
10
3) Floating point numbers sort:
0,99
1
1,01
1,99
2
Collated alpha sort:
Alpha sorting task made by OS (Windows and Linux).
Thousand separated numbers sort: =
1.198
1.199
1.199,50
1.200
1.201
IP addresses:
10.145.254.9
10.145.255.9
10.145.255.10
10.146.254.9
121.243.100.0
255.255.255.254
Thousand and decimal separators are the system default ones.
It is fast. See the time against other functions:
StrCmpLogicalW: 1
WideCompareText: 1,238
NaturalSort: 0,746
Download
The latest version is available here: http://sourceforge.net/projects/lazarusfiles/files/naturalsort.zip/download A demo project is included.
Functions and Procedures
procedure NaturalSort(aList: TStrings);
Example of usage:
procedure TForm1.Button1Click(Sender :TObject); begin NaturalSort(Memo1.Lines); end;
function UTF8NaturalCompareList(aList: TStringList; Index1, Index2: Integer): Integer;
Example of usage:
procedure NaturalSort(aList: TStrings);
var
L: TStringList;
begin
L := TStringList.Create;
try
L.Assign(aList);
L.CustomSort(@UTF8NaturalCompareList);
aList.Assign(L);
finally
L.Free;
end;
end;
