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Commit a162491

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feat: add mastering arrays
1 parent c6baf80 commit a162491

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19 files changed

+129
-853
lines changed

19 files changed

+129
-853
lines changed

‎Topic5/index.html

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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8" />
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<meta name="viewport" content="width=device-width, initial-scale=1.0" />
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<title>Arrays | DSA</title>
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</head>
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<body>
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<script src="./index.js"></script>
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</body>
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</html>

‎Topic5/index.js

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let arr = [];
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arr.push(100);
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arr.push(10);
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arr.push("ali");
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arr.push(false);
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console.log(arr[0]);
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console.log(arr);
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arr.pop();
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console.log(arr);
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let arr1 = new Array(3);
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arr1[0] = 100;
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arr1[1] = 90;
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arr1[2] = 80;
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arr1[3] = 70;
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console.log(arr1);
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let arr2 = new Array(5);
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for (let i = 0; i < arr2.length; i++) {
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arr2[i] = Number(prompt("Enter a value"));
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}
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console.log(arr2);
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// sum of array
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let arr3 = [10, 20, 30, 40, 50];
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let sum = 0;
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for (let i = 0; i < arr3.length; i++) {
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sum += arr3[i];
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}
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console.log(sum);
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// max
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let arr4 = [10, 2, 78, 100, 4];
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let max = arr4[0];
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for (let i = 0; i < arr4.length; i++) {
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if (max < arr4[i]) {
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max = arr4[i];
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}
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}
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console.log(max);
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// Second max
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let arr5 = [10, 30, 56, 43, 29, 64, 49, 60];
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let max1 = Math.max(arr5[0], arr5[1]);
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let sMax = Math.min(arr5[0], arr5[1]);
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for (let i = 2; i < arr5.length; i++) {
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if (arr5[i] > max) {
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sMax = max;
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mar = arr5[i];
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} else if (arr5[i] > sMax && max != arr5[i]) {
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sMax = arr5[i];
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}
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}
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console.log(sMax);
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// Reverse Array with extra space
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let arr6 = [10, 20, 30, 40, 50];
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let temp = new Array(arr6.length);
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let j = 0;
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for (let i = arr6.length - 1; i >= 0; i--) {
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temp[j] = arr6[i];
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j++;
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}
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console.log(temp);
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// my logic with push
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let arr7 = [10, 20, 30, 40, 50];
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let newArr7 = [];
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for (let i = arr.length - 1; i >= 0; i--) {
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mainArr7.push(arr7[i]);
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}
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console.log(mainArr7);
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// Reverse Array with no extra space & no extra array
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let arr8 = [10, 20, 30, 40, 50];
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let i = 0;
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let k = arr8.length - 1;
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while (i !== j) {
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let temp = arr8[i];
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arr8[i] = arr8[j];
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arr8[j] = temp;
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i++;
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j--;
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}
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console.log(arr8);
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// 0s on the left and 1s on right -> two pointer theory
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let arr9 = [0, 1, 0, 1, 1, 0, 0, 1, 0, 1, 0, 0];
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let b = 0;
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for (let i = 0; i < arr9.length; i++) {
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if (arr9[i] === 0) {
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let temp = arr9[b];
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arr9[b] = arr9[i];
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arr9[i] = temp;
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b++;
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}
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}
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console.log(arr9);
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// 0s on the left and 1s on right using while loop -> two pointer theory
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let arr10 = [0, 1, 0, 1, 1, 0, 0, 1, 0, 1, 0, 0];
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let e = 0;
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let f = 0;
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while (e < arr10.length) {
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if (arr10[e] === 0) {
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let temp = arr10[f];
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arr10[f] = arr10[e];
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arr10[e] = temp;
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f++;
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}
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e++;
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}
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console.log(arr10);

‎node_modules/.package-lock.json

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‎node_modules/ansi-regex/index.js

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‎node_modules/ansi-regex/license

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‎node_modules/ansi-regex/package.json

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‎node_modules/ansi-regex/readme.md

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‎node_modules/prompt-sync/LICENSE

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