Updates

bingxie · bingxie · commit e0fe34156940 · 2020-08-24T13:14:12.000+10:00
diff --git a/01 - JavaScript Drum Kit/index-FINISHED.html b/01 - JavaScript Drum Kit/index-FINISHED.html
@@ -60,24 +60,28 @@
 <script>
   function removeTransition(e) {
     if (e.propertyName !== 'transform') return;
+
     e.target.classList.remove('playing');
   }
 
   function playSound(e) {
     const audio = document.querySelector(`audio[data-key="${e.keyCode}"]`);
     const key = document.querySelector(`div[data-key="${e.keyCode}"]`);
+
     if (!audio) return;
 
     key.classList.add('playing');
+
     audio.currentTime = 0;
     audio.play();
   }
 
   const keys = Array.from(document.querySelectorAll('.key'));
   keys.forEach(key => key.addEventListener('transitionend', removeTransition));
-  window.addEventListener('keydown', playSound);
-</script>
 
+  document.addEventListener('keydown', playSound);
+
+</script>
 
 </body>
 </html>
diff --git a/02 - JS and CSS Clock/index-START.html b/02 - JS and CSS Clock/index-START.html
@@ -62,13 +62,37 @@
       background: black;
       position: absolute;
       top: 50%;
+      transform-origin: 100%;
+      transform: rotate(90deg);
+      transition: all 0.05s;
+      transition-timing-function: cubic-bezier(0.1, 2.7, 0.58, 1);
     }
 
   </style>
 
   <script>
+    const secondHand = document.querySelector('.second-hand');
+    const minsHand = document.querySelector('.min-hand');
+    const hourHand = document.querySelector('.hour-hand');
 
+    function setDate() {
+      const now = new Date();
 
+      const seconds = now.getSeconds();
+      const secondsDegrees = (seconds / 60) * 360 + 90;
+      secondHand.style.transform = `rotate(${secondsDegrees}deg)`;
+
+      const mins = now.getMinutes();
+      const minsDegrees = ((mins / 60) * 360) + ((seconds/60)*6) + 90;
+      minsHand.style.transform = `rotate(${minsDegrees}deg)`;
+
+      const hour = now.getHours();
+      const hourDegrees = ((hour / 12) * 360) + ((mins/60)*30) + 90;
+      hourHand.style.transform = `rotate(${hourDegrees}deg)`;
+    }
+
+    setInterval(setDate, 1000);
+    setDate();
   </script>
 </body>
 </html>
diff --git a/04 - Array Cardio Day 1/index-START.html b/04 - Array Cardio Day 1/index-START.html
@@ -31,29 +31,70 @@
 
     // Array.prototype.filter()
     // 1. Filter the list of inventors for those who were born in the 1500's
+    const fifteen = inventors.filter(inventor => (inventor.year >= 1500 && inventor.year < 1600));
+    console.table(fifteen);
 
     // Array.prototype.map()
     // 2. Give us an array of the inventors first and last names
+    const names = inventors.map(inventor => {
+      return `${inventor.first} ${inventor.last}`;
+    });
+    console.table(names);
 
     // Array.prototype.sort()
     // 3. Sort the inventors by birthdate, oldest to youngest
+    const ordered = inventors.sort((a, b) => a.year > b.year ? 1 : -1);
+    console.table(ordered);
 
     // Array.prototype.reduce()
     // 4. How many years did all the inventors live all together?
+    const totalYears = inventors.reduce((total, inventor) => {
+      return total + (inventor.passed - inventor.year);
+    }, 0);
+    console.log(totalYears);
 
     // 5. Sort the inventors by years lived
+    const oldest = inventors.sort(function(a, b) {
+      const aAge = a.passed - a.year;
+      const bAge = b.passed - b.year;
+
+      return aAge > bAge ? -1 : 1;
+    });
+    console.table(oldest);
 
     // 6. create a list of Boulevards in Paris that contain 'de' anywhere in the name
     // https://en.wikipedia.org/wiki/Category:Boulevards_in_Paris
 
+    // const category = document.querySelector('.mw-category');
+    // const links = Array.from(category.querySelectorAll('a'));
+    // const de = links
+    //             .map(link => link.textContent)
+    //             .filter(streetName => streetName.includes('de'));
+
 
     // 7. sort Exercise
-    // Sort the people alphabetically by last name
+    // Sort the people alphabetically by first name
+    const sortedPeople = people.sort(function(a, b){
+      const [aLast, aFirst] = a.split(', ');
+      const [bLast, bFirst] = b.split(', ');
+
+      return aFirst > bFirst ? 1 : -1;
+    });
+    console.table(sortedPeople);
 
     // 8. Reduce Exercise
     // Sum up the instances of each of these
     const data = ['car', 'car', 'truck', 'truck', 'bike', 'walk', 'car', 'van', 'bike', 'walk', 'car', 'van', 'car', 'truck' ];
 
+    const transportation = data.reduce(function(hash, item) {
+      if (!hash[item]) {
+        hash[item] = 0;
+      }
+      hash[item]++;
+
+      return hash;
+    }, {});
+    console.table(transportation);
   </script>
 </body>
 </html>
diff --git a/06 - Type Ahead/index-START.html b/06 - Type Ahead/index-START.html
@@ -17,6 +17,43 @@
 <script>
 const endpoint = 'https://gist.githubusercontent.com/Miserlou/c5cd8364bf9b2420bb29/raw/2bf258763cdddd704f8ffd3ea9a3e81d25e2c6f6/cities.json';
 
+const cities = [];
+fetch(endpoint).then(response => response.json()).then(json => console.log(cities.push(...json)))
+
+function findMatches(wordToMatch, cities) {
+  return cities.filter(place => {
+    const regex = new RegExp(wordToMatch, 'gi');
+    return place.city.match(regex) || place.state.match(regex);
+  });
+}
+
+function numberWithCommas(x) {
+  return x.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ',');
+}
+
+function displayMatches() {
+  const matchArray = findMatches(this.value, cities);
+  const html = matchArray.map(place => {
+    const regex = new RegExp(this.value, 'gi');
+    const cityName = place.city.replace(regex, `<span class="hl">${this.value}</span>`)
+    const stateName = place.state.replace(regex, `<span class="hl">${this.value}</span>`)
+
+    return `
+      <li>
+        <span class="name">${cityName}, ${stateName}</span>
+        <span class="population">${numberWithCommas(place.population)}</span>
+      </li>
+    `;
+  }).join('');
+
+  suggestions.innerHTML = html;
+}
+
+const searchInput = document.querySelector('.search');
+const suggestions = document.querySelector('.suggestions');
+
+searchInput.addEventListener('change', displayMatches);
+searchInput.addEventListener('keyup', displayMatches);
 </script>
 </body>
 </html>
diff --git a/07 - Array Cardio Day 2/index-START.html b/07 - Array Cardio Day 2/index-START.html
@@ -25,16 +25,35 @@
     ];
 
     // Some and Every Checks
-    // Array.prototype.some() // is at least one person 19 or older?
+    // Array.prototype.some() // is at least one person 19 or older?  Ruby: any
+    const anyAudults = people.some(person => ((new Date()).getFullYear() - person.year) > 19);
+    console.log({anyAudults});
     // Array.prototype.every() // is everyone 19 or older?
+    const allAudult = people.every(person => ((new Date()).getFullYear() - person.year) > 19);
+    console.log({allAudult});
 
     // Array.prototype.find()
     // Find is like filter, but instead returns just the one you are looking for
     // find the comment with the ID of 823423
+    // like: Ruby array #find
+    const comment = comments.find(comment => comment.id === 823423);
+    console.log(comment);
 
     // Array.prototype.findIndex()
     // Find the comment with this ID
     // delete the comment with the ID of 823423
+    // like: Ruby array #find_index
+    const index = comments.findIndex(comment => comment.id === 823423);
+    console.log({index});
+
+    // const deleted_comment = comments.splice(index, 1) // in place
+    // console.log(deleted_comment);
+
+    const newComments = [
+      ...comments.slice(0, index),
+      ...comments.slice(index + 1)
+    ]
+    console.table(newComments); // This wont change the comments
 
   </script>
 </body>
diff --git a/08 - Fun with HTML5 Canvas/app.js b/08 - Fun with HTML5 Canvas/app.js
@@ -0,0 +1,45 @@
+const canvas = document.querySelector("#draw");
+const ctx = canvas.getContext("2d");
+
+canvas.width = window.innerWidth;
+canvas.height = window.innerHeight;
+
+ctx.strokeStyle = "#BADA55";
+ctx.lineJoin = "round";
+ctx.lineCap = "round";
+ctx.lineWidth = 10;
+// ctx.globalCompositeOperation = "multiply";
+
+let isDrawing = false;
+let lastX = 0;
+let lastY = 0;
+let hue = 0;
+
+function draw(e) {
+  if (!isDrawing) return; // when not moused down.
+  console.log(e);
+
+  ctx.strokeStyle = `hsl(${hue}, 100%, 50%)`;
+  ctx.beginPath();
+  // start from
+  ctx.moveTo(lastX, lastY);
+  // go to
+  ctx.lineTo(e.offsetX, e.offsetY);
+  ctx.stroke();
+
+  [lastX, lastY] = [e.offsetX, e.offsetY];
+
+  hue++;
+  if (hue >= 360) {
+    hue = 0;
+  }
+}
+canvas.addEventListener("mousedown", e => {
+  isDrawing = true;
+  [lastX, lastY] = [e.offsetX, e.offsetY];
+});
+
+canvas.addEventListener("mousemove", draw);
+
+canvas.addEventListener("mouseup", () => (isDrawing = false));
+canvas.addEventListener("mouseout", () => (isDrawing = false));
diff --git a/08 - Fun with HTML5 Canvas/index-START.html b/08 - Fun with HTML5 Canvas/index-START.html
@@ -6,8 +6,7 @@
 </head>
 <body>
 <canvas id="draw" width="800" height="800"></canvas>
-<script>
-</script>
+<script src="./app.js"></script>
 
 <style>
   html, body {
diff --git a/29 - Countdown Timer/scripts-START.js b/29 - Countdown Timer/scripts-START.js
@@ -0,0 +1,67 @@
+let countdown;
+const timerDisplay = document.querySelector(".display__time-left");
+const endTime = document.querySelector(".display__end-time");
+const buttons = document.querySelectorAll("[data-time]");
+
+function timer(seconds) {
+  clearInterval(countdown);
+
+  const now = Date.now();
+  const then = now + seconds * 1000; // ms
+
+  displayTimeLeft(seconds);
+  displayEndTime(then);
+
+  countdown = setInterval(() => {
+    const secondsLeft = Math.round((then - Date.now()) / 1000);
+
+    if (secondsLeft < 0) {
+      clearInterval(countdown);
+      return;
+    }
+    displayTimeLeft(secondsLeft);
+  }, 1000);
+}
+// setInterval() does not run sometimes
+// On iOS when you are scrolling, it will pause all of your intervals
+
+function displayTimeLeft(seconds) {
+  const minutes = Math.floor(seconds / 60);
+  const remainderSeconds = seconds % 60;
+
+  const display = `${minutes}:${
+    remainderSeconds < 10 ? "0" : ""
+  }${remainderSeconds}`;
+
+  timerDisplay.textContent = display;
+
+  document.title = display;
+
+  console.log({ minutes, remainderSeconds });
+}
+
+function displayEndTime(timestamp) {
+  const end = new Date(timestamp);
+  const hour = end.getHours();
+  const minutes = end.getMinutes();
+
+  endTime.textContent = `Be Back At: ${hour}:${
+    minutes < 10 ? "0" : ""
+  }${minutes}`;
+}
+
+function startTimer(event) {
+  timer(event.target.dataset.time);
+}
+
+buttons.forEach(button => button.addEventListener("click", startTimer));
+
+document.customForm.addEventListener("submit", function(e) {
+  e.preventDefault();
+
+  const minutes = document.customForm.minutes.value;
+
+  timer(minutes * 60);
+
+  e.target.reset();
+});
