Yuliana Sadovskaya

Code examples

• Kata:

  Count characters in your string

  Solution

                                                  
                                                      function count (string) {  
                                                          const arrSort = string.split('').sort();
                                                          let result = {};
                                                          let count = 1;
                                                          if (string.length !== 0) {
                                                          for (let i = 1; i < string.length; i++){
                                                              if (arrSort[i] === arrSort[i - 1]){
                                                              count++;
                                                              } else {
                                                              result[arrSort[i-1]] = count;
                                                              count = 1;
                                                              }
                                                          }
                                                          result[arrSort[string.length-1]] = count;
                                                          }
                                                          return result;
                                                      }
                                              

• Kata:

  Is a number prime?

  Solution

                                                  
                                                      function isPrime(num) {
                                                          let a = 0;
                                                          if (num <= 1){
                                                            a = 0;
                                                          } else if (num === 2 || num === 3){
                                                            a = 1;
                                                          } 
                                                          if(num > 2){
                                                            for (let i = 2; i <= Math.sqrt(num); i++){
                                                              if (num % i) {
                                                                a = 1;
                                                              } else {
                                                                a = 0;
                                                                break;
                                                              }
                                                            }
                                                          } 
                                                          return !!a;
                                                      }
                                              

• Kata:

  Currying functions: multiply all elements in an array

  Solution

                                                  
                                                      function multiplyAll (arr) {
                                                          return function(n) {
                                                          return arr.map((cur) => cur * n);
                                                          }
                                                      }