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I am not sure of best way to convert all Strings in a collection to lowercase. Any thoughts?

    private Set<String> email;        if(userEmail instanceof Collection) {    this.email = new HashSet<String>((Collection<String>) userEmail);    model.put("userEmail", this.email); //need to convert this to lower case}

Thanks in advance :-)

I have a dataframe like the one displayed below:

# Create an example dataframe about a fictional armyraw_data = {'regiment': ['Nighthawks', 'Nighthawks', 'Nighthawks', 'Nighthawks'],            'company': ['1st', '1st', '2nd', '2nd'],            'deaths': ['kkk', 52, '25', 616],            'battles': [5, '42', 2, 2],            'size': ['l', 'll', 'l', 'm']}df = pd.DataFrame(raw_data, columns = ['regiment', 'company', 'deaths', 'battles', 'size'])

My goal is to transform every single string inside of the dataframe to upper case so that it looks like this:

Notice: all data types are objects and must not be changed; the output must contain all objects. I want to avoid to convert every single column one by one... I would like to do it generally over the whole dataframe possibly.

What I tried so far is to do this but without success

df.str.upper()

I need to make a function that reads a string input and converts the odd indexed characters in the string to upperCase and the even ones to lowerCase.

function alternativeCase(string){    for(var i = 0; i < string.length; i++){        if (i % 2 != 0) {            string[i].toUpperCase();        }        else {            string[i].toLowerCase();        }       }    return string;}

How to fix my code?

I am trying to create tables in mysql with flask-sqlalchemy. My problem is that the classnames always start with capital letters while I would like to create all tables with lowercase.

Is there a way to fix that? I read that the default behaviour of the flask-sqlalchemy is converting it to lowercase, but it does not seem to work for me.

Thanks for any advice :)

I am trying to get a xpath query using the xpath function lower-case or upper-case, but they seem to not work in selenium (where I test my xpath before I apply it).

Example that does NOT work:

//*[.=upper-case('some text')]

I have no problem locating the nodes I need in complex path and even using aggregated functions, as long as I don't use the upper and lower case.

Has anyone encountered this before? Does it make sense?

Thanks.