This is the Promises example h/w with random delays

.gitignore

@@ -1,2 +1,9 @@
+<<<<<<< HEAD
+/**/node_modules
+.idea
+/1
+/2
+=======
 /**/node_modules/
 .idea/
+>>>>>>> b2e4fe7196a9b58dee66f89fffd5fbb517995952

.vscode/launch.json

@@ -4,6 +4,12 @@
     // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
     "version": "0.2.0",
     "configurations": [
+        {
+        "type": "node",
+            "request": "launch",
+            "name": "HOMEWORK 3 Unit app",
+            "program": "${workspaceFolder}/3/App2_hw.js"
+        },
         {
             "type": "node",
             "request": "launch",
@@ -16,17 +22,24 @@
             "name": "Launch 2 Unit app",
             "program": "${workspaceFolder}/2/top10.js"
         },
+        {
+            "type": "node",
+            "request": "launch",
+            "name": "L. Obj 2 Unit app",
+            "program": "${workspaceFolder}/2/obj.js"
+        },
         {
             "type": "node",
             "request": "launch",
             "name": "Launch 3 Unit app",
-            "program": "${workspaceFolder}/3/app2.js"
+            "program": "${workspaceFolder}/3/app2_hw.js"
         },
         {
             "type": "node",
             "request": "launch",
             "name": "Launch Pilot",
             "program": "${workspaceFolder}/pilot/app.js"
+
         },
         {
             "type": "node",
@@ -45,6 +58,12 @@
             "request": "launch",
             "name": "CallBack app ( Anton)",
             "program": "${workspaceFolder}/4/callback.js"
+        },
+        {
+            "type": "node",
+            "request": "launch",
+            "name": "Promises app ( Evgen)",
+            "program": "${workspaceFolder}/4/Promises_examples.js"
         }
     ]
 }

1/.eslintrc.js

@@ -14,7 +14,7 @@ module.exports = {
         ],
         "linebreak-style": [
             "error",
-            "unix"
+            "windows"
         ],
         "quotes": [
             "error",

2/.eslintrc.js

@@ -11,7 +11,7 @@ module.exports = {
         ],
         "linebreak-style": [
             "error",
-            "unix"
+            "windows"
         ],
         "quotes": [
             "error",

2/app.js

@@ -7,19 +7,116 @@
  * "}{}{" invalid,
  * "{{}{}{}}" valid;
  */
+// var str = '{}}{{}',
+//     strLength = str.length, 
+//     lastChar = str.charAt(strLength-1),
+//     firstChar = str.charAt(0);
+// console.log('First cond: EVEN number of chars: ' + strLength);
+// console.log('Second cond: Must end with "}" : ' + lastChar);
+// console.log('Thrid cond: Must start from "{" : ' + firstChar);
+// // if (str.indexOf('}') > 0 && firstChar == '{') {
 
-function validation(x){
-    // последовательно просмотреть все символы один  за другим
-    // 1, 2, 3, 4, ....
-    //
-    // если у нас длина строки нечетная, тогда сразу invalid
-    // введем счетчик и если { тогда мы его увеличиваем, если } тогда уменьшаем
+// // }
 
-    return true;
+// if (strLength % 2 == 0 && lastChar == '}' && firstChar == '{' && (str.indexOf('}') > 0 && firstChar == '{')) {
+//     console.log('THIS STRING IS VALID');
+// } else {
+//     console.log('NEIN!! STRING IS INVALID');
+// }
+
+const str = '{{}}}{{}';
+const valSt = 'Valid string';
+const invalSt = 'Invalid string';
+var bracketCount = 0;
+
+function StrVal(str){
+
+    for (let i = 0; i < str.length; i++ ) {
+        if (str[i] == '{' ) {
+            bracketCount++;        
+        }
+        else if (str[i] == '}') {
+            bracketCount-- ;
+            if (bracketCount < 0) {
+                return invalSt;
+            }  
+        }       
+    }
+
+    if (bracketCount == 0) {
+        return valSt;
+    }    
+    return invalSt;
+
+}
+// if (str === false ){
+//     console.log('Invalid string Str');
+// } else{
+//     console.log('Valid Str');
+// }
+console.log(StrVal(str));
+
+// function validation(x){
+//     // последовательно просмотреть все символы один  за другим
+//     // 1, 2, 3, 4, ....
+//     //
+//     // если у нас длина строки нечетная, тогда сразу invalid
+//     // введем счетчик и если { тогда мы его увеличиваем, если } тогда уменьшаем
+
+//     return true;
+// }
+
+// const validatedData = '{{}';
+
+// const isValid = validation(validatedData);
+
+// console.log(`"${validatedData}" is Valid ? "${isValid}"`);
+//---------------------------Task4----------------------------
+//array 0..100
+// var timeBefore = Date.now();
+// var randomArr = [];
+
+// for (var i = 0 ; i <= 100; i++) {
+//     randomArr.push(+i);
+// }
+// var timeAfrer = Date.now();
+// var timeDiff = timeBefore - timeAfrer;
+// console.log('finding top10 took' + timeDiff + 'ms');
+
+// var timeBefore = Date.now();
+const timeBefore = new Date().getTime() / 1000;
+function RandomNum(min, max) {
+    return Math.floor(Math.random() * (max - min + 1)) + min;
+}
+
+function CreateRandomArr(len) {
+    // var len = len || 20;
+    for (var i = 0, arr = []; i < len; i++) {
+        arr.push(RandomNum(0, 1000));
+    }
+    return arr;
 }
+var arr = CreateRandomArr(1000000);
+const n = arr.length; //getting array.length in n
+
+console.log('Number of elements in the array is: ' + n);
 
-const validatedData = '{{}';
+function CompareNum(a, b) {
+    return a - b;
+}
+//find the top10 from arr
+function FindTop10() {
+    let sortedArray = arr.sort(CompareNum); 
+    let top10 = [];
+    for (let i = sortedArray.length - 1; i >= (sortedArray.length-10); i--) {
+        top10.push(sortedArray[i]);
+    }
+    return top10;
+}
 
-const isValid = validation(validatedData);
+var top10Arr = FindTop10();
+console.log('HERE WE GO! TOP 10: ' + top10Arr);
 
-console.log(`"${validatedData}" is Valid ? "${isValid}"`);
+var timeAfrer = new Date().getTime() / 1000;
+var timeDiff = timeBefore - timeAfrer;
+console.log('Time spent on executing the script' + timeDiff + ' sec');

3/.eslintrc.js

@@ -11,7 +11,7 @@ module.exports = {
         ],
         "linebreak-style": [
             "error",
-            "unix"
+            "windows"
         ],
         "quotes": [
             "error",

3/App2_hw.js

@@ -0,0 +1,57 @@
+class ArrayMaker {
+    constructor(size, min = 0 , max = 1000) {
+        this.size = size;
+        this.min = min;
+        this.max = max;
+    }
+    _numRandomizer(){
+        return Math.round(Math.random()*this.max + this.min);
+    }
+    createArray(){
+        const array = [];
+        for (let i = 0; i < this.size; i++ ){
+            array.push(this._numRandomizer);
+        }
+        return array;
+
+    }
+
+}
+
+class Timer {
+    constructor(isSec){
+        this.isSec = isSec;
+        console.log(`Created as "${this.isSec ? 'sec' : 'ms'}" timer`);
+    }
+    start(){
+        const now = new Date();
+        this.timer = now.getTime();
+        console.log(`Started at ${now.getHours()}: ${now.getMinutes()}`);
+    }
+    finish() {
+        const now = new Date();
+        const timeDiff = now.getTime() - this.timer;
+        console.log(`finished at ${ this.isSec ?  timeDiff / 1000 : timeDiff } sec`);
+    }
+
+
+}
+
+const timerSec = new Timer(true);
+const timerMs = new Timer(true);
+const arrayMaker = new ArrayMaker (1000000);
+// console.log(arrayMaker);
+const array1 = arrayMaker.createArray();
+// console.log(array1);
+
+try {
+    timerSec.start();
+    timerMs.start();
+
+    timerSec.finish();
+    timerMs.finish();
+
+    console.log(`Array ${array1.length} was created`);
+} catch(err){
+    console.error(err);
+}

3/app.js

@@ -3,9 +3,9 @@
     This array must be generated from random 0...1000 and print duration (sec)
 */
 
-const min = 5;
+const min = 0;
 const max = 1000;
-const size = 10000000;
+const size = 1000000;
 
 class Timer {
     constructor(isSeconds){
@@ -37,19 +37,37 @@ function generateRandomArray(size, min, max){
     function randomElement(min, max){
         return Math.round(Math.random() * max * 100 + min) / 100;
     }
+
+
+
+}
+// 'use strict'
+//HOW DO I DO THIS
+function compareAb(a, b){
+    return a - b;
+}
+let Filtre = class Compare {
+    Co
+}(a, b) { a - b;} 
+
+function getTop10() {
+    const sortedArr = randomArray.sort(compareAb);
+    const top10 = [];
+    for (let i = sortedArr.length - 1; i>= (sortedArr.length-10); i--) {
+        top10.push(sortedArr[i]);
+    }
+    return top10;
 }
 
 try {
     timerSeconds.start();
     timerMilliseconds.start();
     const data = generateRandomArray(size, min, max);
+    const top10Here = getTop10();
     timerSeconds.finish();
     timerMilliseconds.finish();
 
     console.log(`Array ${data.length} was created`);
 } catch(err){
     console.error(err);
-}
-
-
-
+}

4/.eslintrc.js

@@ -11,7 +11,7 @@ module.exports = {
         ],
         "linebreak-style": [
             "error",
-            "unix"
+            "windows"
         ],
         "quotes": [
             "error",

4/Promises_examples.js

@@ -0,0 +1,48 @@
+function applyForJob(docs) {
+    console.log('Applying for a job...');
+    let promise = new Promise(function(resolve, reject){
+        setTimeout(function(){
+            Math.random() > 0.5 ? resolve({}) : reject('Apply for the job has been rejected');
+        }, 1500);
+    });
+    return promise;
+}
+
+
+function approveApply(permission){
+    console.log('WE GOT APPROVED');
+    return permission;
+}
+// approved => {
+//     console.info('Ur apply has been approved');
+//     return approved;
+// };
+
+function celebrate(permission){
+    console.log(permission);
+    console.log('------------------------');
+    console.log('EAT=>SLEEP=>RAVE=>REPEAT');
+    return new Promise(function(resolve, reject){
+        setTimeout(() => resolve(permission), 1500);
+    });
+}
+
+function getReady(){
+    console.log('------------------------');
+    console.log('Get pants and shirt steamed etc.');
+    return console.log('We are ready to work,' + {});
+}
+
+applyForJob({})
+    .then(approveApply)
+    .then(celebrate)
+    .then(getReady)
+    .catch(error => console.error(error));
+
+
+//     function(approved){
+//     console.info('Ur apply is approved!');
+// },
+// function(reason){
+//     console.error(reason);
+// });