// genrate substring 

var str = "helloworld";
for (var i = 0; i < str.length; i++) {
  for (var j =i+1; j <str.length; j++) {
    console.log(str.slice(i,j));
  }
}

function checkpalindrome(str)
{
  var str2=str;
  var reverse="";
  for(var i=str2.length; i>=0; i--)
  {
    reverse = reverse+str2[i];
    if(reverse==str2)
    {
        {return true}
    }
  else
    { return false}
  }

}
var bam="aba";
var run = checkpalindrome(bam);
console.log(run);


// multidimentional Arra
var item = [
  ["a", "B","c"],
  ["h", "i","g"],
  ["d", "e","f"],
  ]

console.log(item[0][2]);
console.log(item[1][1]);
console.log(item[2][1]);
// a ie

// insert element inside the array in row wise 

var arr = [];
arr.push([1, 2, 3]);
arr.push([1, 4, 3]);
arr.push ([1, 9, 0])
arr.push([11, 45, 54]);

console.log(arr);

var tep = [];
tep.push("A");
tep.push("B");
tep.push([i, 98, 08]);

console.log(tep);

var arr2 =[ ["a", "b", "c"],
              [1, 2, 3],
              ["m", "n","0"]];
              console.log(arr2);
              
// insert a new element inside the array same as upper question 
var arr1 = [];
arr1.push(["a", "b", "c"]);
arr1.push([1,2,3]);
arr1.push(["m", "n","o"])
console.log(arr1);

// Question  you are a given a substring a of length N and character k find
// all substring of a that will start with k
 
 var dot = "good";
for (var i = 0; i < dot.length; i++) {
  var box ="";
  for (var j =i; j <dot.length; j++) {
    box = box + dot[i];
    var count= "";
    for (var m =i+j; m < dot.length; m++) {
       if (dot[i]=="g"){
      count++;
    }
    }
   
  }
}
console.log(count);

// new concept 
var name = [
  ["vishal", 28, "male"],
  ["Annaya", 30, "female"]
  
  ]
// fetching all element 
console.log(name[0][0]);
console.log(name[0][1]);
console.log(name[0][2]);
console.log(name[1][0]);
console.log(name[1][1]);
console.log(name[1][2]);

var name1 = [
  ["sheelkumar", 28, "male",["Coading", "running"]],
  ["Annaya", 30, "female", ["reading ", "hardcoder"]]
  
  ]
  // fetching the element 
  console.log(name1[0][3][0]);
  // it will print string "o"
  console.log(name1[0][3][0][5]);
  
  // inserting ann array inside a array

var floor1 = [1,2,3,4];
var floor2 = [4, 5, 6, 7];
var floor3 = [1, 2, 3, 4];
var blankarr = [];
blankarr.push(floor1);
blankarr.push(floor2);
blankarr.push(floor3);
console.log(blankarr)
console.log(blankarr.length);
console.log(blankarr[2].length);