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Add commonPrefixLength() #175

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@evyncke evyncke commented Jan 30, 2024

Compute the length of the longest prefix match.

Compute the length of the longest prefix match.
@@ -240,6 +264,15 @@
return matchCIDR(this.octets, other.octets, 8, cidrRange);
};

IPv4.prototype.commonPrefixLength = function (other) {
if (other.kind() !== 'ipv4') {
throw new Error('ipaddr: cannot match ipv6 address with non-ipv6 one');
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Suggested change
throw new Error('ipaddr: cannot match ipv6 address with non-ipv6 one');
throw new Error('ipaddr: cannot match ipv4 address with non-ipv4 one');

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@whitequark whitequark left a comment

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What's the use case? I'm unconvinced this is a functionality ipaddr.js should be providing.

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3 participants