Week1-Assignment

.gitignore

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+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+.pnpm-debug.log*
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+*.lcov
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# Snowpack dependency directory (https://snowpack.dev/)
+web_modules/
+
+# TypeScript cache
+*.tsbuildinfo
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional stylelint cache
+.stylelintcache
+
+# Microbundle cache
+.rpt2_cache/
+.rts2_cache_cjs/
+.rts2_cache_es/
+.rts2_cache_umd/
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variable files
+.env
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+
+# parcel-bundler cache (https://parceljs.org/)
+.cache
+.parcel-cache
+
+# Next.js build output
+.next
+out
+
+# Nuxt.js build / generate output
+.nuxt
+dist
+
+# Gatsby files
+.cache/
+# Comment in the public line in if your project uses Gatsby and not Next.js
+# https://nextjs.org/blog/next-9-1#public-directory-support
+# public
+
+# vuepress build output
+.vuepress/dist
+
+# vuepress v2.x temp and cache directory
+.temp
+.cache
+
+# Docusaurus cache and generated files
+.docusaurus
+
+# Serverless directories
+.serverless/
+
+# FuseBox cache
+.fusebox/
+
+# DynamoDB Local files
+.dynamodb/
+
+# TernJS port file
+.tern-port
+
+# Stores VSCode versions used for testing VSCode extensions
+.vscode-test
+
+# yarn v2
+.yarn/cache
+.yarn/unplugged
+.yarn/build-state.yml
+.yarn/install-state.gz
+.pnp.*
+
+
+#.vscode files
+../.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json

01-js/easy/anagram.js

@@ -7,8 +7,27 @@
   - `npm run test-anagram`
 */
 
-function isAnagram(str1, str2) {
 
-}
 
+    function sort(str) {
+      var array = str.split(""); // ["d", "c", "a", "b"]
+      // array = array.map(char => char.toLowerCase());
+                     //OR
+      for (var i = 0; i < array.length; i++) {
+        array[i] = array[i].toLowerCase();
+      console.log(array[i]);
+    }
+      array =  array.sort();
+    var sortedString = array.join("")
+    return sortedString;
+    }
+
+
+function isAnagram(str1, str2) {
+   if (sort(str1) == sort(str2)) {
+    return true;
+    } else {
+    return false;
+    }
+}
 module.exports = isAnagram;

01-js/easy/expenditure-analysis.js

@@ -8,8 +8,60 @@
   - `npm run test-expenditure-analysis`
 */
 
+
+// function calculateTotalSpentByCategory(transactions) {
+//   var spent = {};
+//   for(var  i = 0 ; i < transactions.length; i++ ){
+//     var t = transactions[i];
+//     if(spent[t.category]){
+//       spent[t.category] += t.price;
+// }
+// else {
+// spent[t.category] = t.price ;
+//     }
+//   } 
+
+// var keys = Object.keys(spent);
+
+// var answer = [];
+// for( var i = 0 ; i < keys.length; i++){
+// var category = keys[i];
+// var obj  = {
+//   category : category,
+//   totalSpent : spent[category]
+// };
+// answer.push(obj);
+
+// }
+// return answer;
+
+// }
+
 function calculateTotalSpentByCategory(transactions) {
-  return [];
+  var spent = {};
+  var categories = [];
+  for(var  i = 0 ; i < transactions.length; i++ ){
+    var t = transactions[i];
+    if(spent[t.category]){
+      spent[t.category] += t.price;
+    } else {
+      spent[t.category] = t.price;
+      categories.push(t.category);
+    }
+  } 
+
+  var answer = [];
+  for( var i = 0 ; i < categories.length; i++){
+    var category = categories[i];
+    var obj  = {
+      category : category,
+      totalSpent : spent[category]
+    };
+    answer.push(obj);
+  }
+  return answer;
 }
 
 module.exports = calculateTotalSpentByCategory;
+
+

01-js/medium/palindrome.js

@@ -5,9 +5,37 @@
   Once you've implemented the logic, test your code by running
   - `npm run test-palindrome`
 */
+function check(str) {
+  var answer = "";
+  for(var i = str.length - 1 ; i >= 0 ; i--){
+    answer += str[i];
+  }
+  console.log(answer);
+  return  answer;
+}
+
+function transform(str){
+  var answer = "";
+  for(var i = 0 ; i < str.length ; i++){
+    if(str[i] == " " || str[i] == "?" || str[i] == "," || str[i] == "!" || str[i] == "."){
+
+}else {
+    answer += str[i];  
+}
+  }
+  console.log(answer);
+  return answer;
+}
 
 function isPalindrome(str) {
-  return true;
+  str = str.toLowerCase();
+  console.log(str);
+  str = transform(str);
+  console.log(str);
+  if(str === check(str)){
+    return true;
+  }
+  return false;
 }
 
 module.exports = isPalindrome;

01-js/medium/times.js

@@ -8,5 +8,12 @@ Hint - use Date class exposed in JS
 */
 
 function calculateTime(n) {
-    return 0.01;
-}
+    var start = new Date().getTime();
+    var sum = 0 ;
+    for(var i = 1 ; i < n ; i++){
+      sum += i;
+  }
+    var end = new Date().getTime();
+    console.log((end - start)/1000);
+}
+calculateTime(1000000000);

02-async-js/easy/counter.js

@@ -0,0 +1,8 @@
+var counter = 1;
+
+function stopwatch(){
+  console.clear();
+  console.log(counter);
+  counter= counter + 1;
+}
+setInterval(stopwatch, 1000);

02-async-js/easy/counter_2.js

@@ -0,0 +1,10 @@
+var counter = 1;
+
+function stopwatch() {
+  console.clear();
+  console.log(counter);
+  counter = counter + 1;
+  setTimeout(stopwatch, 1000); 
+}
+
+stopwatch(); 

02-async-js/easy/read-from-file.js

@@ -0,0 +1,11 @@
+const fs = require('fs');
+const path = require('path');
+function read(err, data) {
+    if (err) {
+        console.error(err);
+        return;
+    }
+    console.log(data);
+}
+const filePath = path.join(__dirname, 'read.txt');
+fs.readFile(filePath, 'utf8', read);

02-async-js/easy/read.txt

@@ -0,0 +1 @@
+I AM A MAN WHO DRINKS TEA!

02-async-js/easy/write-to-file.js

@@ -0,0 +1,9 @@
+const fs = require('fs');
+const path = require('path');
+
+const data = "I AM A MAN WHO DRINKS TEA.";
+const filePath = path.join(__dirname, 'write.txt');
+fs.writeFile(filePath, data, "utf8" , function (err) {
+  if (err) throw err;
+  console.log("Wrote to the file successfully.");
+}); 

02-async-js/easy/write.txt

@@ -0,0 +1 @@
+I AM A MAN WHO DRINKS TEA.

02-async-js/medium/clean.txt

@@ -0,0 +1,3 @@
+I             AM    A LOW    
+  KEY SOFTWARE DEVELOPER      
+     AND A    HACKER.

02-async-js/medium/cleaned.txt

@@ -0,0 +1 @@
+I AM A LOW KEY SOFTWARE DEVELOPER AND A HACKER.

02-async-js/medium/clock.js

@@ -0,0 +1,40 @@
+
+function printTime() {
+    var d = new Date();
+    var hours = d.getHours();
+    var minutes = d.getMinutes();
+    var seconds = d.getSeconds();
+    var ampm;
+    if (hours >= 12) {
+      ampm = 'PM';
+    } else {
+      ampm = 'AM';
+    }
+
+    // Convert hours from 24-hour to 12-hour format and prepend 0 if needed
+    hours = hours % 12;
+    if (hours === 0) {
+      hours = 12;
+    }
+    // Prepend 0 to minutes and seconds if needed
+    if (hours < 10) {
+      hours = '0' + hours;
+    }
+
+    if (minutes < 10) {
+      minutes = '0' + minutes;
+    }
+
+    if (seconds < 10) {
+      seconds = '0' + seconds;
+    }
+    var time = hours + ":" + minutes + ":" + seconds + " " +  ampm;
+    console.log(time);
+  }
+
+  function clock(){
+    console.clear();
+    printTime();
+  }
+
+  setInterval(clock, 1000);