JavaScript Basics----Six interesting JS basic questions and Answers

Topic:

1. Find the largest element in a numeric array (using the Math.max function)
2. Convert a numeric array into a function array (each function pops up the corresponding number)
3. Sort an object array (sorting criteria is the number of attributes per element object)
4. Use JavaScript to print out the number of Fibonacci (without using global variables)
5. Implement the following syntax functions: var a = (5). Plus (3). Minus (6); 2
6. Implement the following syntax functions: var a = Add (2) (3) (4);//9


Answer:
1.

1. var a = [10,1,2,3,4,8,9]; function Max (a) {                        var len = a.length-1;                         var maxnum=A[len];                          while (len--) {                 Maxnum=Math.max (Maxnum,a[len])                        }                        return  maxnum;                }                alert (Max (a));

Another solution:

1. function Getarrmax () {                return Math.max.apply (null, a);                }

2.

1.  var  getnumfun = [];  function   Tofun (a) { var  len = A.length;  while  (Len-- 
         
          function 
           (i) {getnumfun[i]  = fu                  Nction   () {alert (a[i]);                                 }}) (Len);        }}  /*   Tofun (a);          GETNUMFUN[5] ();  */ 

3.

varObjarr =[{A:2,b:1}, {d:5}, {a:1,b:2,c:3} ];functionrule (o1,o2) {varSizeobj =function(obj) {varSize=0;  for(varIinchOBJ) size++; returnsize; }       returnSizeobj (O1)-Sizeobj (O2); }/*objarr.sort (rule);        Console.log (Objarr[0]); */

4.

1. function Fib (n) {       if(n===1| | n===2) {return 1;}        Else return Fib (n-1) +fib (n-2);     } /*     Console.log (Fib);    */

5.

1. function (x) {     returnthis +x;    }     function (x) {     returnthis-x;    } /*     Console.log ((5). Plus (3). Minus (6));   */

6.

1. function Add (num) {  var self = arguments.callee;   + = ~ Self;   = num;   return Self ;  }   function () {return  add.num}; /* */

JavaScript Basics----Six interesting JS basic questions and Answers