Kata

Beta Kata

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What's a string in R?

For our purposes, when we say string, we mean an element in a character vector.

Why turn a string into a character vector?

In R, the tools for manipulating individual characters in a string, for example, "l" in "hello", are limited. Usually, you'll want to convert that string to a character vector where each element has only one character, for example, "h" "e" "l" "l" "o"

Task

Write a function expand() that takes a character vector of length 1 (a single string), and turns it into a character vector of all the characters in that string. If there are no characters in the string (see the second example), return an empty character vector (a character vector of length 0). Important note: make sure your function returns a character vector, not a list

Examples

expand("hello")
[1] "h" "e" "l" "l" "o"

expand("")
[1] character(0)