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Solution Review: Append Hearts

Explore solutions to append repeated heart strings in R programming. Learn to create functions that use rep and replicate to duplicate characters across vectors and practice applying these techniques to advanced vector manipulation challenges.

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Solution #1: Using rep()

R
hearts <- function(testVariable)
{
  heart <- "<3"
  vectorOfHearts <- vector("character", 0)
  for(i in testVariable)
  {
    x <- rep(heart, i)
    x <- paste(x, collapse = "")
    vectorOfHearts <-c(vectorOfHearts, x)
  }
  return(vectorOfHearts)
}
# Driver Code
testVariable1 <- c(5, 2)
testVariable2 <- c(3, 3)
hearts(testVariable1)
hearts(testVariable2)

Explanation

In the code snippet above, we first create a function:

hearts <- function(testVariable)

In this function, we define the string heart <- "<3" that we need to replicate. Then initiate a loop over all the elements of the vector testVariable, that is passed to the function. Using the function:

rep(heart, i)

we duplicate the heart string i times.

Solution #2: Using replicate()

R
hearts <- function(testVariable)
{
  heart <- "<3"
  vectorOfHearts <- vector("character", 0)
  for(i in testVariable)
  {
    x <- replicate(i, heart)
    x <- paste(x, collapse = "")
    vectorOfHearts <-c(vectorOfHearts, x)
  }
  return(vectorOfHearts)
}
# Driver Code
testVariable1 <- c(5, 2)
testVariable2 <- c(3, 3)
hearts(testVariable1)
hearts(testVariable2)

Explanation

We can also use the function replicate() to solve this problem.

replicate(i, heart)
# Here i is the number of times the string needs to be duplicated and heart is the string being replicated.

In the next lesson, we have another challenge for you to conquer.