The String struct doesn’t provide a count or length property or method to count the number of characters it contains. Instead a global countElements<T>() function is available. When applied to strings, what’s the complexity of the countElements function:
O(1)
O(n)
and why?
- 1 Answers
- 2059 Views
- I also Faced
- E-Mail Answers
Answer / iosraj
Swift strings support extended grapheme clusters. Each character stored in a string is a sequence of one or more unicode scalars that, when combined, produce a single human readable character. Since different characters can require different amounts of memory, and considering that an extreme grapheme cluster must be accessed sequentially in order to determine which character it represents, it’s not possible to know the number of characters contained in a string upfront, without traversing the entire string. For that reason, the complexity of the countElements function is O(n).
| Is This Answer Correct ? | 0 Yes | 0 No |
How can you define a base class in swift?
What are the advantages of using swift?
Who created swift?
How to pass the data between view controllers?
What language is swift most similar to?
What is encapsulation in swift?
What is “defer”?
Mention what are the collection types available in Swift?
What is property observer in swift?
List some control transfer statements used in swift?
What is the difference between function and method in swift?
How much do swift developers make?
Apple iOS 
