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Posted to issues@commons.apache.org by "Benedikt Ritter (JIRA)" <ji...@apache.org> on 2015/04/28 21:59:06 UTC
[jira] [Resolved] (LANG-1119) Add rotate(string, int) method to
StringUtils
[ https://issues.apache.org/jira/browse/LANG-1119?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Benedikt Ritter resolved LANG-1119.
-----------------------------------
Resolution: Fixed
Fix Version/s: 3.5
Assignee: Benedikt Ritter
PR #71 merged. Thank you for contributing!
> Add rotate(string, int) method to StringUtils
> ---------------------------------------------
>
> Key: LANG-1119
> URL: https://issues.apache.org/jira/browse/LANG-1119
> Project: Commons Lang
> Issue Type: New Feature
> Components: lang.*
> Reporter: Loic Guibert
> Assignee: Benedikt Ritter
> Fix For: 3.5
>
>
> Add a method to rotate (circular shift) a String into StringUtils.
> {code:java}
> /**
> * <p>Rotate (circular shift) a String of {@code shift} characters.</p>
> * <ul>
> * <li>If {@code shift > 0}, right circular shift (ex : ABCDEF => FABCDE)</li>
> * <li>If {@code shift < 0}, left circular shift (ex : ABCDEF => BCDEFA)</li>
> * </ul>
> *
> * <pre>
> * StringUtils.rotate(null, *) = null
> * StringUtils.rotate("", *) = ""
> * StringUtils.rotate("abcdefg", 0) = "abcdefg"
> * StringUtils.rotate("abcdefg", 2) = "fgabcde"
> * StringUtils.rotate("abcdefg", -2) = "cdefgab"
> * StringUtils.rotate("abcdefg", 7) = "abcdefg"
> * StringUtils.rotate("abcdefg", -7) = "abcdefg"
> * StringUtils.rotate("abcdefg", 9) = "fgabcde"
> * StringUtils.rotate("abcdefg", -9) = "cdefgab"
> * </pre>
> *
> * @param str the String to rotate, may be null
> * @param shift number of time to shift (positive : right shift, negative : left shift)
> * @return the rotated String,
> * or the original String if {@code shift == 0},
> * or {@code null} if null String input
> */
> public static String rotate(String str, int shift);
> {code}
> See PR #71 : https://github.com/apache/commons-lang/pull/71
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