Dutch national flag problem in Javascript

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Dutch national flag problem and solution in Javascript Problem statement:   The Dutch national flag (DNF) problem is one of the most popular programming problems proposed by Edsger Dijkstra. The flag of the Netherlands consists of three colors: white, red, and blue. The task is to randomly arrange balls of white, red, and blue such that balls of the same color are placed together. Now, let's consider an array with 3 distinct values say 0, 1 and 2. We won't be using any sort method and we need to sort this array in 0(n). Input Array :  let   arr  = [ 0 ,  2 ,  1 ,  0 ,  1 ,  2 ,  0 ,  2 ]; Expected Output: [ 0, 0, 0, 1, 1, 2, 2, 2 ] Solution Approach : When we see expected output, we can clearly see that sorted array is divided into 3 sections having values 0 , 1 and 2. So, let's divide the array in 3 sections: a) from 0th index to left boundary b) from left boundary to right boundary c) from right boundary to last index. Now we will create 2 pointers : left (starting from 0
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How to make first letter of string uppercase in Javascript || Topic : Strings

 How to convert first letter of each word in a string into uppercase in Javascript.

 
 

Problem statement: 

Suppose you are given the below sample input and expected outputs:



Input : a test input

Output : A Test Input


Input : great!! 

Output:  Great!!


you need to convert the first letter or character of each word in the given string into a uppercase character.


Solution Hint: 

There are numerous ways to achieve the expected output but in this post we will use the string.slice method and toUpperCase() to convert the character to uppercase character.

  

  

Solution: 


var input = "a! test input";

function capitalize(input){

    var inArr = input.split(' ');
    var result=[];
    for (element of inArr){
        var sliced = element.slice(1)
        element = element[0].toUpperCase()+sliced;
        result.push(element);
    }

    return result.join(' ');
}

console.log(capitalize(input));



Output :


A! Test Input



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