<HW4> done

04/main.js

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+// html tree///////////////////////////////////////////////////
+let body = {
+   tagName: 'body',
+   subTags: [
+      {
+         tagName: 'div',
+         subTags: [
+            {
+               tagName: "span",
+               text: "Enter a data please:",
+            },
+            {
+               tagName: "br",
+
+            },
+            {
+               tagName: "input",
+               attrs: {
+                  type: 'text',
+                  id: 'name',
+               },
+            },
+            {
+               tagName: "input",
+               attrs: {
+                  type: 'text',
+                  id: 'surname',
+               },
+
+            }
+         ]
+      },
+      {
+         tagName: 'div',
+         subTags: [
+            {
+               tagName: "button",
+               text: "OK",
+               attrs: {
+                  id: 'ok'
+               },
+            },
+            {
+               tagName: "button",
+               text: "Cancel",
+               attrs: {
+                  id: 'cancel'
+               },
+            },
+         ]
+      }
+
+   ]
+}
+console.log(body.subTags[0].subTags[3].attrs.id)
+console.log(body.subTags[1].subTags[1].text)
+
+
+
+
+//declarative fields///////////////////////////////////////////
+
+// var notebook = {
+//    brand: prompt("enter brand name"),
+//    type: prompt("enter type"),
+//    model: prompt("enter model name"),
+//    ram: +prompt("enter ram"),
+//    size: +prompt("enter size"),
+//    weight: +prompt("enter weight"),
+//    resolution: {
+//       width: +prompt("enter width"),
+//       height: +prompt("enter height"),
+//    },
+// };
+// var notebook = "enter"
+// var arr3 = [prompt(notebook + ' brand'), prompt(notebook + ' type'), prompt(notebook + ' model'), +prompt(notebook + ' ram'), +prompt(notebook + ' size'), +prompt(notebook + ' weight'), + prompt(notebook + ' width'), +prompt(notebook + ' height')];
+
+// var phone = {
+//    brand: prompt("enter brand name"),
+//    model: prompt("enter model name"),
+//    ram: +prompt("enter ram"),
+//    color: prompt("enter color"),
+// };
+// var phone = "enter"
+// var arr2 = [prompt(phone + ' brand'), prompt(phone + ' model'), +prompt(phone + ' ram'), prompt(phone + ' color')];
+
+// var person = {
+//    name: prompt("Enter a name"),
+//    surname: prompt("Enter a surname"),
+//    married: confirm("married?"),
+// };
+// var person = "enter"
+// var arr1 = [prompt(person + ' name'), prompt(person + ' surname'), confirm("married?")];
+
+
+
+//object links/////////////////////////////////////////////////
+
+// var person = {
+//    smartphone: {
+//       owner: prompt("enter smartphone owner"),
+//    },
+//    laptop: {
+//       owner: prompt("enter laptop owner"),
+//    }
+// };
+
+
+
+//imperative array fill 3//////////////////////////////////////
+
+// let arr = [];
+// arr[0] = prompt("enter");
+// arr[1] = prompt("enter");
+// arr[2] = prompt("enter");
+
+
+//while confirm////////////////////////////////////////////////
+// let new1;
+// while (!new1) {
+//    new1 = confirm("ok?");
+//    if (new1) {
+//       break;
+//    }
+// }
+
+
+//array fill//////////////////////////////////////////////////
+// let arr1 = []
+// let box;
+// do {
+//    box = prompt("ok?");
+//    arr1.push(box)
+// }
+// while (box !== null)
+
+
+// array fill nopush//////////////////////////////////////////
+// let arr1 = []
+// i = 0;
+// let box;
+// do {
+//    box = prompt("ok?");
+//    arr1[i] = box;
+//    i++
+// }
+// while (box !== null)
+
+
+
+// infinite probability//////////////////////////////////////
+// let x = 0;
+// let i = 0;
+// while (x < 0.9) {
+//    x = Math.random()
+//    i++
+//    alert(`количество итераций = ${i}`)
+//    if (x > 0.9) {
+//       break;
+//    }
+// }
+/////////////////////////////////////////////////////////////
+// let x = 0;
+// let i = 0;
+// for (let x = 0; x < 0.9; i++) {
+//    x = Math.random()
+// }
+// alert(`количество итераций = ${i}`)
+
+
+// empty loop////////////////////////////////////////////////
+// let box;
+// do {
+//    box = prompt("ok?");
+// }
+// while (box !== "")
+
+
+// progression sum//////////////////////////////////////////
+// let number = +prompt("last number");
+// let sum = 0;
+// for (let b = 1; b < number; b += 3) {
+//    console.log(b)
+//    sum += b
+// }
+// alert(`${sum}`)
+
+
+// chess one line///////////////////////////////////////////
+// let i = ' #';
+// let str = "";
+// for (j = 0; j < 10; j++) {
+//    str += i;
+// }
+// console.log(str)
+
+// let str = "";
+// for (a = 0; a < 10; a++) {
+//    if (a % 2 === 0) str += " ";
+//    else str += "#";
+// }
+// console.log(str);
+
+
+// numbers///////////////////////////////////////////////////
+// let str = "";
+// for (a = 0; a < 10; a++) {
+//    str += "0123456789\n";
+// }
+// console.log(str);
+
+// let str = "";
+// for (let i = 0; i < 10; i++) {
+//    str += "\n";
+//    for (j = 0; j < 10; j++) {
+//       str += j;
+//    }
+// }
+// console.log(str);
+
+
+// chess/////////////////////////////////////////////////////
+// let str = "";
+// for (let i = 0; i < 5; i++) {
+//    str += "\n";
+//    for (a = 0; a < 12; a++) {
+//       if (a % 2 === 0) str += ".";
+//       else str += "#";
+//    }
+//    str += "\n";
+//    for (a = 0; a < 12; a++) {
+//       if (a % 2 === 0) str += "#";
+//       else str += ".";
+//    }
+// }
+// console.log(str);
+
+
+// cubes////////////////////////////////////////////////////
+// let arr1 = []
+// for (i = 0; i < 20; i++) {
+//    arr1.push(Math.pow(i, 3));
+// }
+// console.log(arr1);
+
+
+// multiply table///////////////////////////////////////////
+// let arr = [];
+// for (let a = 1; a <= 10; a++) {
+//    arr[a] = [];
+//    for (let b = 1; b <= 10; b++) {
+//       arr[a][b] = [a * b];
+//    }
+// }
+// alert(arr[5][6]);
+// alert(arr[7][2]);
+
+// matrix to html table////////////////////////////////////