Dark Corners of Unicode (2015)(eev.ee)

  Rust
  line.bytes()

  Swift
  line.utf8

  Go
  line  // slice of bytes
  // assuming line is valid utf8, which is not enforced

  Rust
  line.chars()
  // https://doc.rust-lang.org/std/primitive.char.html

  Swift
  line.unicodeScalars
  // https://developer.apple.com/documentation/swift/unicode/scalar

  Go
  []rune(line)
  // or iterate with range
  for index, runeValue := range line {
    fmt.Printf("%#U starts at byte position %d\n", runeValue, index)
  }
  // https://go.dev/blog/strings

  Rust
  use unicode_segmentation::UnicodeSegmentation;
  line.graphemes(true)

  Swift
  for ch in line {
    print(ch)
  }
  // This is the default view - just iterate over string (or map, filter etc.)
  // In Swift, a `Character` is a grapheme cluster.
  // https://developer.apple.com/documentation/swift/string#Accessing-String-Elements

  Go
  // https://pkg.go.dev/github.com/rivo/uniseg

  Rust
  use unicode_normalization::UnicodeNormalization;
  line.nfc()
  line.nfd()

  Swift
  line.precomposedStringWithCanonicalMapping
  line.decomposedStringWithCanonicalMapping

  Go
  // https://pkg.go.dev/golang.org/x/text/unicode/norm

  Rust
  use diacritics::remove_diacritics;
  remove_diacritics(line)

  Swift
  line.applyingTransform(.stripDiacritics, reverse: false)
  // and others to transform between alphabets etc.
  // https://developer.apple.com/documentation/Foundation/StringTransform