If you missed the introductory post, it's here. For a list of previously solved katas, please refer to the bottom of this page.

If this is your first time seeing my post, please note - these katas are probably randomly assigned per user so please don't go into Codewars thinking we will have exactly the same user experience, I am just posting these in the order that I got them.

Kata #16

DESCRIPTION:

Complete the solution so that it returns true if the first argument(string) passed in ends with the 2nd argument (also a string).

Examples:

solution('abc', 'bc') // returns true
solution('abc', 'd') // returns false

Starting code:

function solution(str, ending){
  // TODO: complete
}

My attempt that worked:

const solution = (str, ending) => str.endsWith(ending) ? true : false

Doing a one-liner code is addicting 🤣 *feelsgoodman.jpg*

Rank #1 'Best Practice':

function solution(str, ending){
  return str.endsWith(ending);
}

This is probably what I would've typed if I wanted to go the traditional way.

Rank #2 'Best Practice' with the one-liner:

const solution = (str, ending) => str.endsWith(ending);

Huh, so the code could still be shorter. I guess the function without the ternary statement I added was 'truthy' by itself.

Rank #3:

function solution(str, ending){
  if (typeof(str) != "string" || typeof(ending) != "string")
    throw "wrong type";
  if (ending.length>str.length)
    return false;
  return str.substr(str.length-ending.length, ending.length) == ending;
}

Rank #4 with the .substr() method:

function solution(str, ending){
  return str.substr(-ending.length) == ending;
}

Other entries worth mentioning at rank #6 with the use of .slice():

function solution(str, ending){
  return str.slice(0 - ending.length) === ending;
}

Rank #8 with .match() submitted by a single person (King.), and the first time I'm seeing it in the wild:

function solution(str, ending){
  var l = ending.length;
  var str = str.slice(-l);
  return str.match(ending) ? true : false;
}

That's it for Kata #16, stay tuned for more katas to be solved!

Link to Kata #1: Square(n) Sum

Link to Kata #2: Convert a Number to a String

Link to Kata #3: DNA to RNA Conversion

Link to Kata #4: Remove First and Last Character

Link to Kata #5: MakeUpperCase

Link to Kata #6: Total amount of points

Link to Kata #7: A Needle in the Haystack

Link to Kata #8: Sum of positive

Link to Kata #9: Basic Mathematical Operations

Link to Kata #10: Beginner - Reduce but Grow

Link to Kata #11: Square Every Digit

Link to Kata #12: Friend or Foe?

Link to Kata #13: Grasshopper - Summation

Link to Kata #14: Get the Middle Character

Link to Kata #15: Descending Order