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https://issues.apache.org/jira/browse/NET-619?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15891390#comment-15891390
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Sebb commented on NET-619:
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Thanks, but the comments only say what the terms in the expression represent;
they don't explain why the formula works.
Nor is there any indication why the code uses a long rather than an int.
> SubnetUtils creates a binary netmask in a bad way
> -------------------------------------------------
>
> Key: NET-619
> URL: https://issues.apache.org/jira/browse/NET-619
> Project: Commons Net
> Issue Type: Improvement
> Reporter: Makoto Sakaguchi
> Priority: Minor
>
> SubnetUtils runs a for-loop to create a binary netmask.
> However, the way has been difficult to understand the program.
> I suggest to replace with a bit-shift, and it has been made a poll request on
> GitHub.
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