Github user PascalSchumacher commented on a diff in the pull request: https://github.com/apache/commons-lang/pull/223#discussion_r114111595 --- Diff: src/main/java/org/apache/commons/lang3/StringUtils.java --- @@ -7193,6 +7193,45 @@ public static boolean isAllUpperCase(final CharSequence cs) { return true; } + /** + * <p>Checks if the CharSequence contains mixed casing of both uppercase and lowercase characters.</p> + * + * <p>{@code null} will return {@code false}. + * An empty String (length()=0) will return {@code false}.</p> + * + * <pre> + * StringUtils.isMixedCase(null) = false + * StringUtils.isMixedCase("") = false + * StringUtils.isMixedCase("aBc") = true + * StringUtils.isMixedCase("ABC") = false + * StringUtils.isMixedCase("abc") = false + * StringUtils.isMixedCase("A c") = false + * StringUtils.isMixedCase("A1c") = false + * StringUtils.isMixedCase("a/C") = false + * </pre> + * + * @param cs the CharSequence to check, may be null + * @return {@code true} if contains both uppercase and lowercase characters, and is non-null + */ + public static boolean isMixedCase(final CharSequence cs) { + if (cs == null || isEmpty(cs)) { + return false; + } + boolean containsUppercase = false; + boolean containsLowercase = false; + final int sz = cs.length(); + for (int i = 0; i < sz; i++) { --- End diff -- @arbasha I believe you requested this feature, what is your opinion on this?
--- If your project is set up for it, you can reply to this email and have your reply appear on GitHub as well. If your project does not have this feature enabled and wishes so, or if the feature is enabled but not working, please contact infrastructure at infrastruct...@apache.org or file a JIRA ticket with INFRA. ---