User:Frap/Reverse domain name notation: Difference between revisions
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Encyclopedic article can be found on [[wp:Reverse domain name notation|Wikipedia]].
Regex:
=={{header|JavaScript}}==▼
^[A-Za-z]{2,6}((?!-)[A-Za-z0-9-]{1,63}(?<!-)\\.)+$
==C#==
<lang csharp>/// <summary>
/// Reverses a domain name.
/// </summary>
/// <param name="domain">A domain name.</param>
/// <returns>A string with the domain name reversed.</returns>
private static string ReverseDomainNameNotation(string domain)
{
return string.Join(".", domain.Split('.').Reverse());
}</lang>
<lang javascript>function reverseDomain(domain) {
return domain.split('.').reverse().join('.');
}</lang>
==
<lang perl>sub reversedomain {
return join ".", reverse split /\./, $_[0];
}</lang>
==
<lang php>function reverseDomain(domain) {
return implode('.', array_reverse(explode('.', domain)));
}</lang>
==PowerShell==
=={{header|Python}}==▼
<lang powershell>function Get-ReverseDomain($domain)
{
$segments = $domain.split('.')
[array]::reverse($segments)
return $segments -join '.';
}</lang>
<lang python>def reverse_domain(domain):
"""Reverses a domain name."""
return '.'.join(reversed(domain.split('.')))</lang>
==
<lang ruby># Reverses a domain name.
def reverse_domain(domain)
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Latest revision as of 16:38, 19 November 2017
Encyclopedic article can be found on Wikipedia.
Regex:
^[A-Za-z]{2,6}((?!-)[A-Za-z0-9-]{1,63}(?<!-)\\.)+$
C#
<lang csharp>/// <summary> /// Reverses a domain name. /// </summary> /// <param name="domain">A domain name.</param> /// <returns>A string with the domain name reversed.</returns> private static string ReverseDomainNameNotation(string domain) {
return string.Join(".", domain.Split('.').Reverse());
}</lang>
JavaScript
<lang javascript>function reverseDomain(domain) {
return domain.split('.').reverse().join('.');
}</lang>
Perl
<lang perl>sub reversedomain {
return join ".", reverse split /\./, $_[0];
}</lang>
PHP
<lang php>function reverseDomain(domain) {
return implode('.', array_reverse(explode('.', domain)));
}</lang>
PowerShell
<lang powershell>function Get-ReverseDomain($domain) {
$segments = $domain.split('.')
[array]::reverse($segments)
return $segments -join '.';
}</lang>
Python
<lang python>def reverse_domain(domain):
"""Reverses a domain name."""
return '.'.join(reversed(domain.split('.')))</lang>
Ruby
<lang ruby># Reverses a domain name. def reverse_domain(domain)
domain.split('.').reverse.join('.')
end</lang>