How to Succinctly Get the First 5 Characters of a String in Swift

What is the most succinct way to remove the first character from a string in Swift?

If you're using Swift 3, you can ignore the second section of this answer. Good news is, this is now actually succinct again! Just using String's new remove(at:) method.

var myString = "Hello, World"
myString.remove(at: myString.startIndex)

myString // "ello, World"

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I like the global dropFirst() function for this.

let original = "Hello" // Hello
let sliced = dropFirst(original) // ello

It's short, clear, and works for anything that conforms to the Sliceable protocol.

If you're using Swift 2, this answer has changed. You can still use dropFirst, but not without dropping the first character from your strings characters property and then converting the result back to a String. dropFirst has also become a method, not a function.

let original = "Hello" // Hello
let sliced = String(original.characters.dropFirst()) // ello

Another alternative is to use the suffix function to splice the string's UTF16View. Of course, this has to be converted back to a String afterwards as well.

let original = "Hello" // Hello
let sliced = String(suffix(original.utf16, original.utf16.count - 1)) // ello

All this is to say that the solution I originally provided has turned out not to be the most succinct way of doing this in newer versions of Swift. I recommend falling back on @chris' solution using removeAtIndex() if you're looking for a short and intuitive solution.

var original = "Hello" // Hello
let removedChar = original.removeAtIndex(original.startIndex)

original // ello

And as pointed out by @vacawama in the comments below, another option that doesn't modify the original String is to use substringFromIndex.

let original = "Hello" // Hello
let substring = original.substringFromIndex(advance(original.startIndex, 1)) // ello

Or if you happen to be looking to drop a character off the beginning and end of the String, you can use substringWithRange. Just be sure to guard against the condition when startIndex + n > endIndex - m.

let original = "Hello" // Hello

let newStartIndex = advance(original.startIndex, 1)
let newEndIndex = advance(original.endIndex, -1)

let substring = original.substringWithRange(newStartIndex..<newEndIndex) // ell

The last line can also be written using subscript notation.

let substring = original[newStartIndex..<newEndIndex]

Remove the first six characters from a String (Swift)

length is the number of characters you want to remove (6 in your case)

extension String {

  func toLengthOf(length:Int) -> String {
            if length <= 0 {
                return self
            } else if let to = self.index(self.startIndex, offsetBy: length, limitedBy: self.endIndex) {
                return self.substring(from: to)

            } else {
                return ""
            }
        }
}

How to get the first character of each word in a string?

You can try this code:

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let stringInput = "First Last"
let stringInputArr = stringInput.components(separatedBy:" ")
var stringNeed = ""

for string in stringInputArr {
    stringNeed += String(string.first!)
}

print(stringNeed)

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If have problem with componentsSeparatedByString you can try seperate by character space and continue in array you remove all string empty.

Hope this help!

How do I take a substring to the first index of a character?

Something like this should work:

myMessage.substringToIndex(myMessage.characters.indexOf(" ")!)

Note that in this code I force unwrapped the optional. If you're not guaranteed to have that space in the string, it might make more sense to have the index in a optional binding.

With optional binding, it would look something like this:

if let index = myMessage.characters.indexOf(" ") {
    let result = myMessage.substringToIndex(index)
}

Add a space in a String after the first letter - Swift 5

var greeting = "Hello, playground"
greeting.insert(" ", at: greeting.index(after: greeting.startIndex))
print(greeting) // H ello, playground 
greeting.insert(" ", at: greeting.index(greeting.startIndex, offsetBy: 1))
print(greeting) // H  ello, playground

Better way to find occurrence amount of a certain character in a string

One possible solution:

let string = "xhjklghxhjkjjklxjhjkjxx"

print(string.filter({ $0 == "x" }).count)
// prints: 5

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