How to get the First Character in a name

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I have below func in my class.

static func getFirstCharInName(strName: String) -> String {

   let firstCharInName = String(strName.first)

    return firstCharInName.trim()
}

I encountered this err:

Value of optional type 'Character?' must be unwrapped to a value of type 'Character'

What seems to be the problem?

Thanks

func getFirstCharInName(strName: String) -> String {
    let indexStartOfText = strName.index(strName.startIndex, offsetBy: 0)
    let indexEndOfText = strName.index(strName.startIndex, offsetBy: 0)
    let firstChar = String(strName[indexStartOfText...indexEndOfText])
    return firstChar
}

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This error means that the expression has optional value (the value can be nil) that is not yet unwrapped, strName.first returns an optional value of Character?, but your function demands a returning type of String which is not an optional type.

So, in order to fix this, you need to unwrap the optional value strName.first, it seems like you are not familiar with optionals, here's the code for your case (choose one from two options):

func getFirstCharInName(strName: String) -> String {
    // option 1: force unwrap - can cause fatal error
    return String(strName.first!)

    // option 2: optional binding
    if let firstCharInName = strName.first {
        return String(firstCharInName)
    } else {
        // if the optional value is nil, return an empty string
        return ""
    }
}

PS. I don't really understand the function trim() in your question, but if you mean to strip away the blank spaces like " ", you can do:

firstCharInName.trimmingCharacters(in: .whitespaces)

Extract First Name And First Character Of Last Name In Excel, In this pose we will see how to extract first name and initial of last name in excel given the full name. Suppose we have been given full name in column A which� I have a column with first, last and middle names together separated with spaces as below, Stephen A. Jahn John F. Antony G. Mary G. Nick J N . I would like to get the first letter of first name and last letter with initial as below. With few names having middle names I just want to get first and last initials. How can I get that, S A. J F. A G

Avoid the optional simply with prefix, it's totally safe. if there is no first character you'll get an empty string.

static func getFirstChar(in name: String) -> String { // the function name getFirstChar(in name is swiftier
    return String(name.prefix(1))
}

I don't know what the trim function is supposed to do.

Manipulating Characters in a String (The Java™ Tutorials , You can get the character at a particular index within a string by invoking the charAt() The index of the first character is 0, while the index of the last character is the use of lastIndexOf() and substring() to isolate different parts of a file name . Get the first character of a string in python. As indexing of characters in a string starts from 0, So to get the first character of a string pass the index position 0 in the [] operator i.e.

It means that value of optional type 'Character?' (as result of your part of code strName.first) must be unwrapped to a value of type 'Character' before you will be gonna cast it to String type. You may use this variant:

func getFirstCharInName(strName: String) -> String {
   return strName.count != 0 ? String(strName.first!) : ""
}

As you can see, the exclamation point is in the string strName.first! retrieves the optional variable as it was needed.

How to get first character of a string in SQL?, You can use MYSQL SUBSTRING () Function in this way: Have a look at this video to understand where to use String Functions with syntax and� MySQL Basic Select Statement: Exercise-12 with Solution. Write a query to get the first three characters of first name of all employees. Sample table: employees

you can do something like that:

extension String {

    var firstLetter: String {

        guard !self.isEmpty else { return "" }
        return String(self[self.startIndex...self.startIndex])
    }
}

then

let name = "MilkBottle"
let first = name.firstLetter // "M"

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Java - String charAt Example, String class can be used to retrieve a character from given index. The method returns a character, you can see its return type is char. The index starts from zero and� If you need extract the first name from a full name, you can easily do so with the FIND and LEFT functions. In the generic form of the formula (above), name is a full name, with a space separating the first name from other parts of the name.

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Left, Mid, and Right functions, The first character of the string is position 1. NumberOfCharacters - Required The label shows the last three characters of each product name. How to get first character of a string in SQL? Ask Question Asked 11 years, 3 months ago. Active 4 months ago. Viewed 659k times 267. 30. I have a SQL column with a

Comments
  • why not just let first = String(name[name.startIndex...name.startIndex])...? – and you might need to check whether the string has at least 1 character for doing some failsafe (see my answer, I just created eventually).
  • User can find solution from this link : stackoverflow.com/questions/24092884/…