sharedDomains

Calculates how many dot-separated domains two strings share.

This is useful to see to what extent two addresses are similar.

Pass reverse: true to do reverse domain matching, like for flatpak application IDs.

pure @safe @nogc nothrow

auto

sharedDomains

(

const string one

const string other

const bool reverse = false

const bool caseSensitive = true

)

Parameters

one string: First domain string.
other string: Second domain string.
reverse bool: Whether or not to do reverse domain matching.
caseSensitive bool: Whether or not comparison should be done on a case-sensitive basis.

Return Value

Type: auto

The number of domains the two strings share.

TODO: Support partial globs.

Examples

int numDomains = sharedDomains("irc.freenode.net", "leguin.freenode.net");
assert(numDomains == 2);  // freenode.net

int numDomains2 = sharedDomains("Portlane2.EU.GameSurge.net", "services.gamesurge.net", caseSensitive:false);
assert(numDomains2 == 2);  // gamesurge.net

int numDomains3 = sharedDomains("org.kde.Platform", "org.kde.KStyle.Awaita", reverse: true);
assert(numDomains3 == 2);  // org.kde

1 import std.conv : text;
2 
3 {
4     immutable n = sharedDomains("irc.freenode.net", "help.freenode.net");
5     assert((n == 2), n.text);
6 }
7 {
8     immutable n = sharedDomains("irc.rizon.net", "services.rizon.net");
9     assert((n == 2), n.text);
10 }
11 {
12     immutable n = sharedDomains("www.google.com", "www.yahoo.com");
13     assert((n == 1), n.text);
14 }
15 {
16     immutable n = sharedDomains("www.google.se", "www.google.co.uk");
17     assert((n == 0), n.text);
18 }
19 {
20     immutable n = sharedDomains("", string.init);
21     assert((n == 0), n.text);
22 }
23 {
24     immutable n = sharedDomains("irc.rizon.net", "rizon.net");
25     assert((n == 2), n.text);
26 }
27 {
28     immutable n = sharedDomains("rizon.net", "rizon.net");
29     assert((n == 2), n.text);
30 }
31 {
32     immutable n = sharedDomains("net", "net");
33     assert((n == 1), n.text);
34 }
35 {
36     immutable n = sharedDomains("forum.dlang.org", "...");
37     assert((n == 0), n.text);
38 }
39 {
40     immutable n = sharedDomains("blahrizon.net", "rizon.net");
41     assert((n == 1), n.text);
42 }
43 {
44     immutable n = sharedDomains("rizon.net", "blahrizon.net");
45     assert((n == 1), n.text);
46 }
47 {
48     immutable n = sharedDomains("rizon.net", "irc.rizon.net");
49     assert((n == 2), n.text);
50 }
51 {
52     immutable n = sharedDomains("irc.gamesurge.net", "Stuff.GameSurge.net", caseSensitive:false);
53     assert((n == 2), n.text);
54 }
55 {
56     immutable n = sharedDomains("irc.freenode.net", "irc.FREENODE.net", caseSensitive:false);
57     assert((n == 3), n.text);
58 }
59 
60 /+
61     Reverse domains, like those of flatpak application IDs.
62  +/
63 {
64     immutable n = sharedDomains("irc.SpotChat.org", "irc.FREENODE.net", caseSensitive:false);
65     assert((n == 0), n.text);
66 }
67 {
68     immutable n = sharedDomains("org.kde.Plasma", "org.kde.Kate", reverse: true);
69     assert((n == 2), n.text);
70 }
71 {
72     immutable n = sharedDomains("com.redhat.Something", "com.redhat.Other", reverse: true);
73     assert((n == 2), n.text);
74 }
75 {
76     immutable n = sharedDomains(
77         "org.freedesktop.Platform.GL.default",
78         "org.freedesktop.Platform.VAAPI.Intel",
79         reverse: true);
80     assert((n == 3), n.text);
81 }
82 {
83     immutable n = sharedDomains("org.kde.Platform", "im.riot.Riot", reverse: true);
84     assert((n == 0), n.text);
85 }

lu misc classes

enums

functions

sharedDomains