JavaScript Kata #33: Find the smallest integer in the array

By YayoDrayber | Learn To Code With Me | 13 Sep 2022

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 #33

DESCRIPTION:

Given an array of integers your solution should find the smallest integer.

For example:

Given [34, 15, 88, 2] your solution will return 2
Given [34, -345, -1, 100] your solution will return -345

You can assume, for the purpose of this kata, that the supplied array will not be empty.

Starting code:

class SmallestIntegerFinder {
  findSmallestInt(args) {
    
  }
}

My attempt:

class SmallestIntegerFinder {
  findSmallestInt(args) {
    let sorted = args.sort((a,b)=>a-b)
    return sorted[0]
  }
}

Rank #1 in 'Best Practice':

class SmallestIntegerFinder {
  findSmallestInt(args) {
    return Math.min(...args)
  }
}

Rank #2 about the same:

class SmallestIntegerFinder {
  findSmallestInt(args) {
    return Math.min.apply(null, args);
  }
}

Rank #3:

class SmallestIntegerFinder {
  findSmallestInt(args) {
    args.sort(function(a, b) {
    return a - b; } )
    return args[0];
  }
}

Ranks #4 and #5 are similar to the aforementioned approaches:

//Rank #4
class SmallestIntegerFinder {
  findSmallestInt(args) {
    return args.sort((a,b)=>a-b)[0];
  }
}

//Rank #5
class SmallestIntegerFinder {
  findSmallestInt( $ ) {
    return Math.min(...$);
  }
}

Whereas rank #6 shows us how to do it with .reduce():

class SmallestIntegerFinder {
  findSmallestInt(args) {
    return args.reduce(function(prev, curr, index, array) {
      return prev < curr ? prev : curr;
    });
  }
}

That's it for Kata #33, 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