Strings

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Lab

This is the original contents of the lab file (../labs/06-strings/06-strings.lab.sh).

Follow the instructions in the file to solve the lab.

# Assume the following string is passed to this function:
#
#   /usr/bin/cowabunga-time-my-3-amigos.sh
#
sobash_silly_string() {

  if [[ "$#" == "0" ]]; then
    echo -e "\n[FAIL] ${FUNCNAME[0]} | No options passed."
    return 3
  fi

  local word
  local first_letter
  local last_letter

  word="$1"

  # Remove any directories from path, leaving only the filename
  # word="${word##*/}"

  # Remove all characters besides the letters.
  # Uncomment only one of the next two lines.
  # word="${word//[^a-zA-Z]/}"
  # word="${word//[a-zA-Z]/}"

  # Assign only the first letter of word to "first_letter" variable
  # Uncomment only one of the next three lines
  # first_letter="${word:0:1}"
  # first_letter="${word:1}"
  # first_letter="${word:1:1}"


  # Assign only the last letter of word to "last_letter" variable
  # Uncomment only one of the next three lines
  # last_letter="${word:0: -1}"
  # last_letter="${word: -1}"
  # last_letter="${word:1: -1}"


  # Make the word lowercase
  # word="${word,,}"
  # word="${word^^}"

  echo "${first_letter^^}${word:1: -1}${last_letter^^}"



}

Test

This is the original contents of the test file (../labs/06-strings/06-strings.test.sh).

Review the test cases and your lab file.

Will the lab file (../labs/06-strings/06-strings.lab.sh) pass all test cases?

#!/usr/bin/env bash

test_assert_parsed_options_are_valid() {

    output="$(../build/sobash silly-string /usr/bin/cowabunga-time-my-3-amigos.sh)"
   assertEquals "$output" "CowabungatimemyamigossH"

}

source ./shunit2

When ready, run the following to execute the tests above against the lab file:

cd "${HOME}/bash-programming/src/" \ 
  && ./test.sh lab 06-strings

Solution

This is the original contents of the solution file (../labs/06-strings/06-strings.solution.sh).

This file contains an example of a viable solution that passes all the test cases.

# Assume the following string is passed to this function:
#
#   /usr/bin/cowabunga-time-my-3-amigos.sh
#
sobash_silly_string() {

  if [[ "$#" == "0" ]]; then
    echo -e "\n[FAIL] ${FUNCNAME[0]} | No options passed."
    return 3
  fi

  local word
  local first_letter
  local last_letter

  word="$1"

  # Remove any directories from path, leaving only the filename
  word="${word##*/}"

  # Remove all characters besides the letters.
  # Uncomment only one of the next two lines.
  word="${word//[^a-zA-Z]/}"
  # word="${word//[a-zA-Z]/}"

  # Assign only the first letter of word to "first_letter" variable
  # Uncomment only one of the next three lines
  first_letter="${word:0:1}"
  # first_letter="${word:1}"
  # first_letter="${word:1:1}"


  # Assign only the last letter of word to "last_letter" variable
  # Uncomment only one of the next three lines
  # last_letter="${word:0: -1}"
  last_letter="${word: -1}"
  # last_letter="${word:1: -1}"


  # Make the word lowercase
  word="${word,,}"
  # word="${word^^}"

  echo "${first_letter^^}${word:1: -1}${last_letter^^}"



}

Run the following to execute the tests above against the solution file:

cd "${HOME}/bash-programming/src/" \ 
  && ./test.sh solution 06-strings

Feel free to run the following to override the contents of the lab file with the solution file.

cd "${HOME}/bash-programming/labs/" \ 
  && cp ./06-strings/06-strings.{solution,lab}.sh