Duplicate Character Counter in R

Duplicate Character

Counter in R

Welcome to the Duplicate Character Counter in R page! Here, you'll find the source code for this program as well as a description of how the program works.

Current Solution

args <- commandArgs(trailingOnly = TRUE)

USAGE <- "Usage: please provide a string"

if (length(args) != 1 || !nzchar(x <- args[[1]])) {
  cat(USAGE, "\n")
  quit(status = 1)
}

chars <- strsplit(x, "")[[1]]
chars <- chars[grepl("[[:alnum:]]", chars)]

if (!length(chars)) {
  cat("No duplicate characters\n")
  quit(status = 0)
}

counts <- table(chars)

dups <- counts[counts > 1]
dups <- dups[order(match(names(dups), chars))]

if (!length(dups)) {
  cat("No duplicate characters\n")
} else {
  cat(paste(names(dups), dups, sep = ": "), sep = "\n")
}

Duplicate Character Counter in R was written by:

• Ștefan-Iulian Alecu

If you see anything you'd like to change or update, please consider contributing.

How to Implement the Solution

No 'How to Implement the Solution' section available. Please consider contributing.

How to Run the Solution

No 'How to Run the Solution' section available. Please consider contributing.