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    "url": "\/study-help\/questions\/im-really-stuck-on-this-javascript-assignment-the-clocks-app-13561027",
    "question_creation_date_js": "2024-09-26T00:02:27-04:00",
    "question_creation_date": "Sep 26, 2024 12:02 AM",
    "meta_title": "[Solved] I'm really stuck on this JavaScript assig | SolutionInn",
    "meta_description": "Answer of - I'm really stuck on this JavaScript assignment. The clock's app stopwatch has to be enhanced. I already added the read | SolutionInn",
    "meta_keywords": "m,stuck,javascript,assignment,clock,s,app,stopwatch,enhanced,added,read-,property",
    "question_title_h1": "I'm really stuck on this JavaScript assignment. The clock's app stopwatch has to be enhanced. I already added the read-only property in the library_stopwatch.js file,",
    "question_title": "I'm really stuck on this JavaScript assignment. The clock's app stopwatch has",
    "question_title_for_js_snippet": "I'm really stuck on this JavaScript assignment  The clock's app stopwatch has to be enhanced  I already added the read only property in the library stopwatch js file, but I'm not even sure if I added it correctly  Here are the steps below    Note that there is a new library file named library stopwatch augment js  In the HTML file, note that the script tag for this new library comes after the script tag for the stopwatch library  Also note that theres a new span tag for the hours value of the stopwatch with a default value of 00    Change the library stopwatch js file so the module object has a read only property that exposes the values of the private elapsed object  NOTE  Because elapsed is an object, if you return it directly, its properties can be changed even if the property that returns it is non configurable  Thus, youll need to return an object that contains copies of the values in the elapsed objects properties    In the library stopwatch augment js file, add code that augments the stopwatch module by adding a method named getElapsedTimeWithHours  Within this new method, get the object from the read only property from the previous step, add an hours property to it, calculate the number of elapsed hours, adjust the number of elapsed minutes, and return the adjusted object    Change the code in the clock js file so the displayTick callback function uses the getElapsedTimeWithHours function from step 3 to display the hours in the s hours span tag  Be sure to reset this span tag in the resetStopwatch callback function  CLOCK CSS body   font family  Arial, Helvetica, sans serif  background color  white  margin  0 auto  width  450px  border  3px solid blue  padding  0 2em 1em    h1   color  blue    label   float  left  width  11em  text align  right  padding bottom   5em    input   margin right  1em  margin bottom   5em    fieldset   margin bottom  1em     date   margin left  2em    INDEX HTML Clock Digital clock with stopwatch Clock     Stop Watch 00   00   00   000 CLOCK JS  use strict   (function()      aliases var t   myapp time  var u   myapp utility     callback function for displaying clock time var displayTime   function(now)   u $( hours ) firstChild nodeValue   now hours  u $( minutes ) firstChild nodeValue   u padSingleDigit(now minutes)  u $( seconds ) firstChild nodeValue   u padSingleDigit(now seconds)  u $( ampm ) firstChild nodeValue   now ampm     display date in  m d yyyy  format   correct for zero based month var date   (now getMonth()   1)         now getDate()         now getFullYear()  u $( date ) firstChild nodeValue   date        callback function for displaying stopwatch elapsed time var displayTick   function(elapsed)   u $( s minutes ) firstChild nodeValue   u padSingleDigit(elapsed minutes)  u $( s seconds ) firstChild nodeValue   u padSingleDigit(elapsed seconds)  u $( s ms ) firstChild nodeValue   elapsed milliseconds        callback function for clearing stopwatch elapsed time display var resetStopwatch   function()   u $( s minutes ) firstChild nodeValue    00   u $( s seconds ) firstChild nodeValue    00   u $( s ms ) firstChild nodeValue    000         onload event handler window onload   function()      start clock t clock start(displayTime)     set up stopwatch event handlers u $( start ) onclick   function()   t stopwatch start(displayTick)     u $( stop ) onclick   function()   t stopwatch stop()     u $( reset ) onclick   function()   t stopwatch reset(resetStopwatch)         )()  LIBRARY CLOCK JS  use strict   myapp time clock   (function()      private state var displayTimeCallbackFunction  var displayCurrentTime   function()   var now   new Date()     add own properties to instance of Date object now hours   now getHours()  now minutes   now getMinutes()  now seconds   now getSeconds()  now ampm    AM      set default value    correct hours and AM PM value for display if (now hours   12)      convert from military time now hours   now hours   12  now ampm    PM     else      adjust 12 noon and 12 midnight switch (now hours)   case 12     noon now ampm    PM   break  case 0     midnight now hours   12  now ampm    AM          use callback function to display time if (displayTimeCallbackFunction    typeof displayTimeCallbackFunction     'function')   displayTimeCallbackFunction(now)          public methods return   start  function(callback)   displayTimeCallbackFunction   callback     store callback for later use by timer displayCurrentTime()  setInterval(displayCurrentTime, 1000)        )()  LIBRARY STOPWATCH JS  use strict   myapp time stopwatch   (function()      private state var timer  var elapsed     minutes 0, seconds 0, milliseconds 0    var displayTickCallbackFunction  var tickStopwatch   function()      increment milliseconds by amount of interval elapsed milliseconds   elapsed milliseconds   10     roll over milliseconds to seconds, seconds to minutes if (elapsed milliseconds     1000)   elapsed seconds    elapsed milliseconds   0    if (elapsed seconds     60)   elapsed minutes    elapsed seconds   0       use callback to display new stopwatch time if (displayTickCallbackFunction    typeof displayTickCallbackFunction     'function')   displayTickCallbackFunction(elapsed)          public methods return   start  function(callback)   displayTickCallbackFunction   callback     store callback for later use by timer tickStopwatch()  timer   setInterval(tickStopwatch, 10)  return this   , stop  function()   clearInterval(timer)  return this   , setMinutes  function(min)   if ( isNaN(min))   if (min    0    min",
    "question_description": "<p>I'm really stuck on this JavaScript assignment. The clock's app stopwatch has to be enhanced. I already added the read-only property in the library_stopwatch.js file, but I'm not even sure if I added it correctly. Here are the steps below:<\/p> <p>- Note that there is a new library file named library_stopwatch_augment.js. In the HTML file, note that the script tag for this new library comes after the script tag for the stopwatch library. Also note that theres a new span tag for the hours value of the stopwatch with a default value of 00.<\/p> <p>- Change the library_stopwatch.js file so the module object has a read-only property that exposes the values of the private elapsed object. NOTE: Because elapsed is an object, if you return it directly, its properties can be changed even if the property that returns it is non-configurable. Thus, youll need to return an object that contains copies of the values in the elapsed objects properties.<\/p> <p>- In the library_stopwatch_augment.js file, add code that augments the stopwatch module by adding a method named getElapsedTimeWithHours. Within this new method, get the object from the read-only property from the previous step, add an hours property to it, calculate the number of elapsed hours, adjust the number of elapsed minutes, and return the adjusted object.<\/p> <p>- Change the code in the clock.js file so the displayTick callback function uses the getElapsedTimeWithHours function from step 3 to display the hours in the s_hours span tag. Be sure to reset this span tag in the resetStopwatch callback function.<\/p> <p>CLOCK.CSS<\/p> <p>body {<\/p> <p> font-family: Arial, Helvetica, sans-serif;<\/p> <p> background-color: white;<\/p> <p> margin: 0 auto;<\/p> <p> width: 450px;<\/p> <p> border: 3px solid blue;<\/p> <p> padding: 0 2em 1em;<\/p> <p>}<\/p> <p>h1 {<\/p> <p> color: blue;<\/p> <p>}<\/p> <p>label {<\/p> <p> float: left;<\/p> <p> width: 11em;<\/p> <p> text-align: right;<\/p> <p> padding-bottom: .5em;<\/p> <p>}<\/p> <p>input {<\/p> <p> margin-right: 1em;<\/p> <p> margin-bottom: .5em;<\/p> <p>}<\/p> <p>fieldset {<\/p> <p> margin-bottom: 1em;<\/p> <p>}<\/p> <p>#date {<\/p> <p> margin-left: 2em;<\/p> <p>}<\/p> <p>INDEX.HTML<\/p> <p><!DOCTYPE html><\/p> <p><html><\/p> <p><head><\/p> <p> <meta charset=\"UTF-8\"> <\/p> <p> <title>Clock<\/title><\/p> <p> <link rel=\"stylesheet\" href=\"clock.css\"><\/p> <p> <script src=\"library_namespace.js\"><\/script><\/p> <p> <script src=\"library_utility.js\"><\/script><\/p> <p> <script src=\"library_clock.js\"><\/script><\/p> <p> <script src=\"library_stopwatch.js\"><\/script><\/p> <p> <script src=\"library_stopwatch_augment.js\"><\/script><\/p> <p> <script src=\"clock.js\"><\/script><\/p> <p><\/head><\/p> <p><body><\/p> <p> <main><\/p> <p> <h1>Digital clock with stopwatch<\/h1><\/p> <p> <fieldset><\/p> <p> <legend>Clock<\/legend><\/p> <p> <span id=\"hours\"> <\/span>:<\/p> <p> <span id=\"minutes\"> <\/span>:<\/p> <p> <span id=\"seconds\"> <\/span> <\/p> <p> <span id=\"ampm\"> <\/span><\/p> <p> <span id=\"date\"> <\/span><\/p> <p> <\/fieldset><\/p> <p> <\/p> <p> <fieldset><\/p> <p> <legend>Stop Watch<\/legend><\/p> <p> <input type=\"button\" id=\"start\" value=\"Start\"><\/p> <p> <input type=\"button\" id=\"stop\" value=\"Stop\"><\/p> <p> <input type=\"button\" id=\"reset\" value=\"Reset\"><\/p> <p> <span id=\"s_hours\">00<\/span>:<\/p> <p> <span id=\"s_minutes\">00<\/span>:<\/p> <p> <span id=\"s_seconds\">00<\/span>:<\/p> <p> <span id=\"s_ms\">000<\/span><\/p> <p> <\/fieldset> <\/p> <p> <\/main><\/p> <p><\/body><\/p> <p><\/html><\/p> <p>CLOCK.JS<\/p> <p>\"use strict\";<\/p> <p>(function() {<\/p> <p> \/\/ aliases <\/p> <p> var t = myapp.time;<\/p> <p> var u = myapp.utility;<\/p> <p> <\/p> <p> \/\/ callback function for displaying clock time <\/p> <p> var displayTime = function(now) {<\/p> <p> u.$(\"hours\").firstChild.nodeValue = now.hours;<\/p> <p> u.$(\"minutes\").firstChild.nodeValue = u.padSingleDigit(now.minutes);<\/p> <p> u.$(\"seconds\").firstChild.nodeValue = u.padSingleDigit(now.seconds);<\/p> <p> u.$(\"ampm\").firstChild.nodeValue = now.ampm;<\/p> <p> <\/p> <p> \/\/ display date in \"m\/d\/yyyy\" format - correct for zero-based month<\/p> <p> var date = (now.getMonth() + 1) + \"\/\" + now.getDate() + \"\/\" + now.getFullYear();<\/p> <p> u.$(\"date\").firstChild.nodeValue = date;<\/p> <p> };<\/p> <p> \/\/ callback function for displaying stopwatch elapsed time <\/p> <p> var displayTick = function(elapsed) {<\/p> <p> u.$(\"s_minutes\").firstChild.nodeValue = u.padSingleDigit(elapsed.minutes);<\/p> <p> u.$(\"s_seconds\").firstChild.nodeValue = u.padSingleDigit(elapsed.seconds);<\/p> <p> u.$(\"s_ms\").firstChild.nodeValue = elapsed.milliseconds;<\/p> <p> };<\/p> <p> \/\/ callback function for clearing stopwatch elapsed time display<\/p> <p> var resetStopwatch = function() {<\/p> <p> u.$(\"s_minutes\").firstChild.nodeValue = \"00\";<\/p> <p> u.$(\"s_seconds\").firstChild.nodeValue = \"00\";<\/p> <p> u.$(\"s_ms\").firstChild.nodeValue = \"000\";<\/p> <p> };<\/p> <p> <\/p> <p> \/\/ onload event handler<\/p> <p> window.onload = function() {<\/p> <p> \/\/ start clock<\/p> <p> t.clock.start(displayTime);<\/p> <p> <\/p> <p> \/\/ set up stopwatch event handlers<\/p> <p> u.$(\"start\").onclick = function() {<\/p> <p> t.stopwatch.start(displayTick);<\/p> <p> };<\/p> <p> u.$(\"stop\").onclick = function() {<\/p> <p> t.stopwatch.stop();<\/p> <p> };<\/p> <p> u.$(\"reset\").onclick = function() {<\/p> <p> t.stopwatch.reset(resetStopwatch);<\/p> <p> };<\/p> <p> }; <\/p> <p>})();<\/p> <p>LIBRARY_CLOCK.JS<\/p> <p>\"use strict\";<\/p> <p>myapp.time.clock = (function() {<\/p> <p> \/\/ private state<\/p> <p> var displayTimeCallbackFunction; <\/p> <p> <\/p> <p> var displayCurrentTime = function() {<\/p> <p> var now = new Date();<\/p> <p> <\/p> <p> \/\/ add own properties to instance of Date object<\/p> <p> now.hours = now.getHours();<\/p> <p> now.minutes = now.getMinutes();<\/p> <p> now.seconds = now.getSeconds();<\/p> <p> now.ampm = \"AM\"; \/\/ set default value<\/p> <p> <\/p> <p> \/\/ correct hours and AM\/PM value for display<\/p> <p> if (now.hours > 12) { \/\/ convert from military time<\/p> <p> now.hours = now.hours - 12;<\/p> <p> now.ampm = \"PM\";<\/p> <p> } else { \/\/ adjust 12 noon and 12 midnight<\/p> <p> switch (now.hours) {<\/p> <p> case 12: \/\/ noon<\/p> <p> now.ampm = \"PM\";<\/p> <p> break;<\/p> <p> case 0: \/\/ midnight<\/p> <p> now.hours = 12;<\/p> <p> now.ampm = \"AM\";<\/p> <p> }<\/p> <p> }<\/p> <p> \/\/ use callback function to display time<\/p> <p> if (displayTimeCallbackFunction && typeof displayTimeCallbackFunction === 'function') {<\/p> <p> displayTimeCallbackFunction(now);<\/p> <p> }<\/p> <p> };<\/p> <p> <\/p> <p> \/\/ public methods<\/p> <p> return {<\/p> <p> start: function(callback) {<\/p> <p> displayTimeCallbackFunction = callback; \/\/ store callback for later use by timer<\/p> <p> displayCurrentTime();<\/p> <p> setInterval(displayCurrentTime, 1000);<\/p> <p> }<\/p> <p> };<\/p> <p> <\/p> <p>})();<\/p> <p>LIBRARY_STOPWATCH.JS<\/p> <p>\"use strict\";<\/p> <p>myapp.time.stopwatch = (function() {<\/p> <p> \/\/ private state<\/p> <p> var timer;<\/p> <p> var elapsed = { minutes:0, seconds:0, milliseconds:0 }; <\/p> <p> var displayTickCallbackFunction;<\/p> <p> <\/p> <p> var tickStopwatch = function() { <\/p> <p> \/\/ increment milliseconds by amount of interval<\/p> <p> elapsed.milliseconds = elapsed.milliseconds + 10;<\/p> <p> <\/p> <p> \/\/ roll over milliseconds to seconds, seconds to minutes<\/p> <p> if (elapsed.milliseconds === 1000) {<\/p> <p> elapsed.seconds++;<\/p> <p> elapsed.milliseconds = 0;<\/p> <p> }<\/p> <p> if (elapsed.seconds === 60) {<\/p> <p> elapsed.minutes++;<\/p> <p> elapsed.seconds = 0;<\/p> <p> }<\/p> <p> <\/p> <p> \/\/ use callback to display new stopwatch time<\/p> <p> if (displayTickCallbackFunction && typeof displayTickCallbackFunction === 'function') {<\/p> <p> displayTickCallbackFunction(elapsed);<\/p> <p> }<\/p> <p> };<\/p> <p> <\/p> <p> \/\/ public methods<\/p> <p> return {<\/p> <p> start: function(callback) {<\/p> <p> displayTickCallbackFunction = callback; \/\/ store callback for later use by timer<\/p> <p> tickStopwatch();<\/p> <p> timer = setInterval(tickStopwatch, 10);<\/p> <p> return this;<\/p> <p> },<\/p> <p> stop: function() {<\/p> <p> clearInterval(timer);<\/p> <p> return this;<\/p> <p> },<\/p> <p> setMinutes: function(min) {<\/p> <p> if (!isNaN(min)) {<\/p> <p> if (min >= 0 && min <= 60) {<\/p> <p> elapsed.minutes = min;<\/p> <p> }<\/p> <p> } <\/p> <p> return this;<\/p> <p> },<\/p> <p> reset: function(callback) {<\/p> <p> clearInterval(timer);<\/p> <p> elapsed = { minutes:0, seconds:0, milliseconds:0 }; <\/p> <p> <\/p> <p> \/\/ use callback to reset stopwatch display<\/p> <p> if (callback && typeof callback === 'function') {<\/p> <p> callback();<\/p> <p> }<\/p> <p> return this;<\/p> <p> }<\/p> <p> };<\/p> <p> \/\/read-only<\/p> <p> Object.defineProperties(stopwatch, {<\/p> <p> \"getElapsed\": {<\/p> <p> get: function() { return <\/p> <p> minutes = elapsed.minutes;<\/p> <p> seconds = elapsed.minutes;<\/p> <p> milliseconds = elapsed.milliseconds }<\/p> <p> }<\/p> <p> }); <\/p> <p> return: stopwatch;<\/p> <p>})();<\/p> <p>LIBRARY_STOPWATCH_AUGMENT.JS<\/p> <p>\"use strict\";<\/p> <p> <\/p> <p>LIBRARY_NAMESPACE.JS<\/p> <p>\"use strict\";<\/p> <p> <\/p> <p>\/\/ create the namespace and nested namespace creator method<\/p> <p>var myapp = myapp || {};<\/p> <p> <\/p> <p>myapp.addNamespace = function (namespace) {<\/p> <p> var currentName;<\/p> <p> var parent = this;<\/p> <p> var names = namespace.split(\".\");<\/p> <p> <\/p> <p> for (var i in names) {<\/p> <p> currentName = names[i];<\/p> <p> parent[currentName] = parent[currentName] || {};<\/p> <p> parent = parent[currentName];<\/p> <p> }<\/p> <p> return this;<\/p> <p>}.bind(myapp);<\/p> <p> <\/p> <p>\/\/ add the namespaces the application will use<\/p> <p> myapp.addNamespace(\"time.clock\").addNamespace(\"time.stopwatch\")<\/p> <p> .addNamespace(\"utility\");<\/p> <p> <\/p> <p>LIBRARY_UTILITY.JS<\/p> <p>\"use strict\";<\/p> <p>myapp.utility.padSingleDigit = function(num) {<\/p> <p> return (num < 10) ? \"0\" + num : num;<\/p> <p>};<\/p> <p>myapp.utility.$ = function(id) { return document.getElementById(id); };<\/p>",
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    "related_book": {
        "title": "Essentials of Database Management",
        "isbn": "133405680, 9780133547702 , 978-0133405682",
        "edition": "1st edition",
        "authors": "Jeffrey A. Hoffer, Heikki Topi, Ramesh Venkataraman",
        "cover_image": "https:\/\/dsd5zvtm8ll6.cloudfront.net\/si.question.images\/book_images\/1792.jpg",
        "uri": "\/textbooks\/essentials-of-database-management-1st-edition-1792",
        "see_more_uri": "\/textbooks\/computer-science-visual-objects-2530"
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