Ablestate Corhort 1 javascript session

Inbuilt JavaScript Functions part2

/**
*String properties and methods continued
 */
 /*
 *string.length: Returns the number of characters in the string. They include alphabets, spaces, punctuation and everything that is included in the string.
 */

let exampleString = "Tugezesa strings mu JavaScript";
const obuwanvuBwaString = exampleString.length;
console.log(obuwanvuBwaString );

exampleString = `'{}{}/;'.=+_-!$`;

const obuwanvuBwaString2 = exampleString.length;

console.log(obuwanvuBwaString2);

console.log(exampleString);

/**
* string.replace(regexToFind, repkacementString/Function, flags )
* string.replace(stringToFind, repkacementString/Function, flags )
*/

//Replace Tugea wwith Trying  out
console.clear();
exampleString = "Tugezesa strings mu JavaScript"
exampleString = exampleString.replace("Tugezesa", "Trying out")

console.log(exampleString);

/**   
* string.split(separator, limit): Splits a string into chunks based on the separator and returns an array  of characters
* If the separator is not definited the given string will be return as the only value of the new array.
*/

const SPLIT_STRING = exampleString.split();
console.log(SPLIT_STRING);

const SPLIT_STRING_SEPARATED_BY_SPACE = exampleString.split(" ");
console.log(SPLIT_STRING_SEPARATED_BY_SPACE);

const SPLIT_STRING_BY_INTO_LETTERS = exampleString.split(" ");
console.log(SPLIT_STRING_BY_INTO_LETTERS);

const SPLIT_STRING_SEPARATED_BY_SPACE_LIMIT= exampleString.split(" ", 4);
console.log(SPLIT_STRING_SEPARATED_BY_SPACE_LIMIT);

const SPLIT_STRING_SEPARATED_BY_A= exampleString.split("a");
console.log(SPLIT_STRING_SEPARATED_BY_A);

//Challenge reverse the string

/**
* ------
*1.  Separate the string by letters to get an array
*2. Loop the elements of the Array while concatinating them to the reverse string
*3. Return the reversed string
*4. Display the string
*/

let reversedString = ''; // 0(1)

let position = SPLIT_STRING_BY_INTO_LETTERS.length - 1; //0(1)

for (position; position >= 0; position--){ //0(n) 0(2n + 2) => 0(n) linear
  reversedString += SPLIT_STRING_BY_INTO_LETTERS[position] // 0(1) =>
}

console.log(reversedString);


//Using while
/**
* Quiz: Using comments describe what the functionbwlow does. Describe each line in the function 
*Submit your answer before the end of the today
*@function  REVERSE_STRING
*@param {string} string 
*@loop - while
*@param {string} name 
*@param {string} lastPosition
*@param {string} reversedString 
*@param {string} SPLIT_STRING_BY_INTO_LETTERS
*@param {string}  nameReversed
*
*/

const REVERSE_STRING = (string) =>{  //Arrow function inittalization with a parameter called string
      if (string == "" || string == null || string == 0) return string; //Returns  the value or input passed to the string parameter through checking the   

      const SPLIT_STRING_BY_INTO_LETTERS = string.split(""); //Returns an array of character splitted into chunks 

      let lastPosition = SPLIT_STRING_BY_INTO_LETTERS.length - 1; // returns the number of characters in a string and substracts one  assigning the result to lastPosition

      let reversedString = "";  //inittalization of the string


      while(lastPosition >= 0){ // condition executes if the value of lastPosition is greater or  equal to zero;
        reversedString += SPLIT_STRING_BY_INTO_LETTERS[lastPosition]; //concatinating of the 
        lastPosition--; //subtract one from the value passed to the lastPosition
      }

      return reversedString; // returns "" if the while loop is not exactude      
}

let name = "Wampamba";
let nameReversed = REVERSE_STRING(name); //assigning the name identifier to the function
console.log(nameReversed); 
console.log(REVERSE_STRING("DA"));
console.log(REVERSE_STRING());