Online Upper Case Converter

I am trying to make a string alternate between upper and lower case letters. My current code is this:

def skyline (str1):     result = ''    index = 0    for i in str1:        result  += str1[index].upper() + str1[index + 1].lower()        index += 2    return result

When I run the above code I get an error saying String index out of range. How can I fix this?

How to sort a string in C alphabetically with upper case letters before equivalent lower case letters.

Example:

input:  baBadxDoutput: aaBbDdx

I'm fairly new to java and was wondering if there is a method that finds the uppercase letters in a string and also if there is method that finds the numbers in a string. Thank you

I've tried using the uppercase filter but it does not work. I've tried doing it two ways:

<input type="text" ng-model="test" uppercase/>

and

<input type="text" ng-model="{{test | uppercase}}"/>

The 2nd triggers a javascript error:

Syntax Error: Token 'test' is unexpected, expecting [:]

I want the text to be forced to uppercase as the user types in the textbox.

How can I do that?

I am taking a JSON input and I want it to convert it to uppercase. Can someone please help me with my code

int synchronizeSingleUnit(ApiResultDTO apiResultDTO, def inputJSON, int totalUpdates) {    def sql = synchronizationApiSqlHelperService.getUnitsSql()    String unit = getEmptyIfValueNull(inputJSON.unit)    def session = sessionFactory_apiDb.openSession() as SessionImpl    def connection = session.connection()    def sqlConnection = new Sql(connection)    try {        sqlConnection.execute(sql, [unit:unit])    } catch (Exception ex) {        // Preload result with statement to be executed        apiResultDTO.setJsonFailingPart(inputJSON)        apiResultDTO.setFailedSql(sql, [unit:unit])        throw new ExceptionWrapper(apiResultDTO, ex)    } finally {        session.close()        connection.close()    }