Array Common Tools

//Pass an array into the function and return a new array that holds the number of repetitions of each element in the first array.
function fa (arr) {
var num;
var arra = [];
For (var i = 0; i < arr.length; i++) {
num = 0;
For (var j = 0; J < Arr.length; J + +) {
if (arr [j] = = arr [i]) {
num++
                                           };
                             };
Arra.push (num);
                   };
Console.log (ARRA);
           };
var a = [1, 2, 3, 3, 2, 1, 3,-2,-2, 1];
FA (a); [3, 2, 3, 3, 2, 3, 3, 2, 2, 3]



//Pass an array into the function and return a new array that holds the elements in the first array for repetition.
function fb (arr) {
var num;
var arra = [];
For (var i = 0; i < arr.length; i++) {
num = 0;
For (var j = 0; J < Arr.length; J + +) {
if (arr [j] = = arr [i]) {
num++
                                       };
                           };
if (num > 1) {
Arra.push ("repeat")
} else {
Arra.push ("no Repetition")
                             };
                   };
Console.log (ARRA);
          };
var b = [1, 2, 3, 4, 5, 3, 1];
FB (b);//["Repeat", "no Repetition", "repeat", "no Repetition", "no Repetition", "repeat", "repeat"]


//Determine if there is an element in an array, and if so, it appears several times.
function FC (n, arr) {
var num = 0;
For (var i = 0; i < arr.length; i++) {
if (arr [i] = = N) {
num++
                                };
                    };
if (num > 0) {
Console.log ("There is this element, it appears" + num + "Times")
} else {
Console.log ("Without this element")
                     };
           };
var c = [0, 1, 2, 3, 4, 5, 2, 5, 1, 2, 3];
FC (2, C);//With this element, it appears 3 times


//To find the maximum value in an array.
function fd (arr) {
var num = arr [0];
For (var i = 1; i < arr.length; i++) {
if (num < arr [i]) {
num = num ^ arr [i];
arr [i] = num ^ arr [i];
num = num ^ arr [i];
                               };
                      };
console.log (num);
           };
var d=[0,1,33,32,16,12,8,4];
FD (d);//33


//An array is arranged in order from small to large.
function Fe (arr) {
For (var i = 0; i < arr.length-1; i++) {
For (var j = i + 1; j < Arr.length; J + +) {
if (arr [i] > arr [j]) {
arr [i] = arr [i] ^ arr [j];
arr [j] = arr [i] ^ arr [j];
arr [i] = arr [i] ^ arr [j];
                                          };
                                  };
                     };
Console.log (arr);
           };
var e = [1, +, +, -10, 0];
Fe (e);//[-10,0,1,12,15,17,23,26,28]

Array Common Tools