You've successfully subscribed to The Poor Coder | Hackerrank Solutions
Great! Next, complete checkout for full access to The Poor Coder | Hackerrank Solutions
Welcome back! You've successfully signed in.
Success! Your account is fully activated, you now have access to all content.
Hackerrank Ruby - Strings - Methods I Solution

Hackerrank Ruby - Strings - Methods I Solution

Beeze Aal
Beeze Aal

.MathJax_SVG_Display {text-align: center; margin: 1em 0em; position: relative; display: block!important; text-indent: 0; max-width: none; max-height: none; min-width: 0; min-height: 0; width: 100%} .MathJax_SVG .MJX-monospace {font-family: monospace} .MathJax_SVG .MJX-sans-serif {font-family: sans-serif} .MathJax_SVG {display: inline; font-style: normal; font-weight: normal; line-height: normal; font-size: 100%; font-size-adjust: none; text-indent: 0; text-align: left; text-transform: none; letter-spacing: normal; word-spacing: normal; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0; min-height: 0; border: 0; padding: 0; margin: 0} .MathJax_SVG * {transition: none; -webkit-transition: none; -moz-transition: none; -ms-transition: none; -o-transition: none} .mjx-svg-href {fill: blue; stroke: blue}

Text info can be read from varied sources and is often unsuitable for direct processing or usage by core functions. This necessitates methods for post-processing and data-fixing. In this tutorial, we'll learn how to remove flanking whitespace and newline from strings.

  • String.chomp(separator=$/): Returns a new string with the given separator removed from the end of the string (if present). If $/ has not been changed from the default Ruby record separator, then chomp also removes carriage return characters (that is, it will remove \n, \r, and \r\n).> "Hello World!  \r\n".chomp"Hello World!  "> "Hello World!".chomp("orld!")"Hello W"> "hello \n there".chomp"hello \n there"
  • String.strip - Returns a new string with the leading and trailing whitespace removed.> "    hello    ".strip"hello"> "\tgoodbye\r\n".strip"goodbye"
  • String.chop - Returns a new string with the last character removed. Note that carriage returns (\n, \r\n) are treated as single character and, in the case they are not present, a character from the string will be removed.> "string\n".chop"string"> "string".chop"strin"

In this challenge, your task is to code a process_text method, which takes an array of strings as input and returns a single joined string with all flanking whitespace and new lines removed. Each string has to be separated by a single space.> process_text(["Hi, \n", " Are you having fun?    "])"Hi, Are you having fun?"

Solution in ruby

Approach 1.

def process_text(arr)
    arr.map {|s| s.strip}.join(" ")
end

        

Approach 2.

def process_text(words)
  words.collect {|word| word.strip}.join(' ')
end

Approach 3.

# Enter your code here. Read input from STDIN. Print output to STDOUT
def process_text(array)
    array.map{|x| x.strip}.join(" ")
end