[jira] Commented: (LANG-432) Fix case-insensitive string handling

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[ https://issues.apache.org/jira/browse/LANG-432?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12595895#action_12595895 ]

Benjamin Bentmann commented on LANG-432:
----------------------------------------

The proposed changes to {{StringUtils.containsIgnoreCase()}} aim at establishing the following assertion:
{noformat}
str1.equalsIgnoreCase(str2) ==> StringUtils.containsIgnoreCase(str1, str2)
{noformat}
or more completely
{noformat}
StringUtils.containsIgnoreCase(str1, str2)
iff. there exists k >= 0 such that
str1.substring(k, k + str2.length()).equalsIgnoreCase(str2)
{noformat}

> Fix case-insensitive string handling
> ------------------------------------
>
> Key: LANG-432
> URL: https://issues.apache.org/jira/browse/LANG-432
> Project: Commons Lang
> Issue Type: Bug
> Affects Versions: 2.4
> Reporter: Benjamin Bentmann
> Fix For: 3.0
>
> Attachments: LANG-432.patch
>
>
> {{String.to*Case()}} is locale-sensitive, this is usually not intended for case-insensitive comparisions. Please see [Common Bug #3|http://www.nabble.com/Re%3A-Common-Bugs-p14931921s177.html] for details.

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