Some changes on exercise 8. #9
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| <!doctype html> | ||
| <html lang="en"> | ||
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| <head> | ||
| <meta charset="utf-8"> | ||
| <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"> | ||
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| <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" | ||
| integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous"> | ||
| <link rel="stylesheet" href="style.css"> | ||
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| <title>Stefanos' Javascript Calculator</title> | ||
| <script src="https://kit.fontawesome.com/b039c65688.js" crossorigin="anonymous"></script> | ||
| </head> | ||
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| <body> | ||
| <div class="container text-center background"> | ||
| <div class="row justify-content-center"> | ||
| <div class="screen m-3 rounded"> | ||
| <div data-previous-operand class="previous-operand"></div> | ||
| <div data-current-operand class="current-operand"></div> | ||
| </div> | ||
| </div> | ||
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| <div class="row justify-content-center"> | ||
| <button type="button" class="btn btn-dark btn-lg m-1 p-auto clear" data-all-clear>AC</button> | ||
| <button type="button" class="btn btn-dark btn-lg m-1 p-auto" data-delete><i | ||
| class="fas fa-backspace"></i></button> | ||
| <button type="button" class="btn btn-dark btn-lg m-1 p-auto" data-operation>÷</button> | ||
| </div> | ||
| <div class="row justify-content-center"> | ||
| <button type="button" class="btn btn-dark btn-lg m-1 p-auto" data-number>7</button> | ||
| <button type="button" class="btn btn-dark btn-lg m-1 p-auto" data-number>8</button> | ||
| <button type="button" class="btn btn-dark btn-lg m-1 p-auto" data-number>9</button> | ||
| <button type="button" class="btn btn-dark btn-lg m-1 p-auto" data-operation>×</button> | ||
| </div> | ||
| <div class="row justify-content-center"> | ||
| <button type="button" class="btn btn-dark btn-lg m-1 p-auto" data-number>4</button> | ||
| <button type="button" class="btn btn-dark btn-lg m-1 p-auto" data-number>5</button> | ||
| <button type="button" class="btn btn-dark btn-lg m-1 p-auto" data-number>6</button> | ||
| <button type="button" class="btn btn-dark btn-lg m-1 p-auto" data-operation>-</button> | ||
| </div> | ||
| <div class="row justify-content-center"> | ||
| <button type="button" class="btn btn-dark btn-lg m-1 p-auto" data-number>1</button> | ||
| <button type="button" class="btn btn-dark btn-lg m-1 p-auto" data-number>2</button> | ||
| <button type="button" class="btn btn-dark btn-lg m-1 p-auto" data-number>3</button> | ||
| <button type="button" class="btn btn-dark btn-lg m-1 p-auto" data-operation>+</button> | ||
| </div> | ||
| <div class="row justify-content-center"> | ||
| <button type="button" class="btn btn-dark btn-lg m-1 p-auto" data-number>0</button> | ||
| <button type="button" class="btn btn-dark btn-lg m-1 p-auto" data-number>00</button> | ||
| <button type="button" class="btn btn-dark btn-lg m-1 p-auto" data-number>.</button> | ||
| <button type="button" class="btn btn-dark btn-lg m-1 p-auto equals" data-equals><i | ||
| class="fas fa-equals"></i></button> | ||
| </div> | ||
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| </div> | ||
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| <!-- Optional JavaScript --> | ||
| <!-- jQuery first, then Popper.js, then Bootstrap JS --> | ||
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| <script src="https://code.jquery.com/jquery-3.4.1.slim.min.js" | ||
| integrity="sha384-J6qa4849blE2+poT4WnyKhv5vZF5SrPo0iEjwBvKU7imGFAV0wwj1yYfoRSJoZ+n" | ||
| crossorigin="anonymous"></script> | ||
| <script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js" | ||
| integrity="sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo" | ||
| crossorigin="anonymous"></script> | ||
| <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js" | ||
| integrity="sha384-wfSDF2E50Y2D1uUdj0O3uMBJnjuUD4Ih7YwaYd1iqfktj0Uod8GCExl3Og8ifwB6" | ||
| crossorigin="anonymous"></script> | ||
| <script src="main.js"></script> | ||
| </body> | ||
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| </html> |
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| class Calculator { | ||
| constructor(previousOperandTextElement, currentOperandTextElement) { | ||
| this.previousOperandTextElement = previousOperandTextElement | ||
| this.currentOperandTextElement = currentOperandTextElement | ||
| this.clear() | ||
| } | ||
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| clear() { | ||
| this.currentOperand = "" | ||
| this.previousOperand = "" | ||
| this.operation = undefined | ||
| } | ||
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| delete() { | ||
| this.currentOperand = this.currentOperand.toString().slice(0, -1) | ||
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| } | ||
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| appendNumber(number) { | ||
| if (number === "." && this.currentOperand.includes(".")) return | ||
| this.currentOperand = this.currentOperand.toString() + number.toString() | ||
| } | ||
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| chooseOperation(operation) { | ||
| if (this.currentOperand === "") return | ||
| if (this.previousOperand !== "") { | ||
| this.compute() | ||
| } | ||
| this.operation = operation | ||
| this.previousOperand = this.currentOperand | ||
| this.currentOperand = "" | ||
| } | ||
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| compute() { | ||
| let computation | ||
| const prev = parseFloat(this.previousOperand) | ||
| const curr = parseFloat(this.currentOperand) | ||
| if (isNaN(prev) || isNaN(curr)) return | ||
| switch (this.operation) { | ||
| case "+": | ||
| computation = prev + curr | ||
| break; | ||
| case "-": | ||
| computation = prev - curr | ||
| break; | ||
| case "×": | ||
| computation = prev * curr | ||
| break; | ||
| case "÷": | ||
| computation = prev / curr | ||
| break; | ||
| default: | ||
| return | ||
| } | ||
| this.currentOperand = computation | ||
| this.operation = undefined | ||
| this.previousOperand = "" | ||
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| } | ||
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| getDisplayNumber(number) { | ||
| const stringNumber = number.toString() | ||
| const integerDigits = parseFloat(stringNumber.split(".")[0]) | ||
| const decimalDigits = stringNumber.split(".")[1] | ||
| let integerDisplay | ||
| if (isNaN(integerDigits)) { | ||
| integerDisplay = "" | ||
| } else { | ||
| integerDisplay = integerDigits.toLocaleString("en", { maximumFractionDigits: 0 }) | ||
| } | ||
| if (decimalDigits != null) { | ||
| return `${integerDisplay}.${decimalDigits}` | ||
| } else { | ||
| return integerDisplay | ||
| } | ||
| } | ||
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| updateDisplay() { | ||
| this.currentOperandTextElement.innerText = this.getDisplayNumber(this.currentOperand) | ||
| if (this.operation != null) { | ||
| this.previousOperandTextElement.innerText = `${this.getDisplayNumber(this.previousOperand)} ${this.operation}` | ||
| } else { | ||
| this.previousOperandTextElement.innerText = "" | ||
| } | ||
| } | ||
| } | ||
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| const numberButtons = document.querySelectorAll('[data-number]'); | ||
| const operationButtons = document.querySelectorAll('[data-operation]'); | ||
| const equalsButton = document.querySelector('[data-equals]'); | ||
| const deleteButton = document.querySelector('[data-delete]'); | ||
| const allClearButton = document.querySelector('[data-all-clear]'); | ||
| const previousOperandTextElement = document.querySelector('[data-previous-operand]'); | ||
| const currentOperandTextElement = document.querySelector('[data-current-operand]'); | ||
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| const calculator = new Calculator(previousOperandTextElement, currentOperandTextElement) | ||
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| numberButtons.forEach(button => { | ||
| button.addEventListener("click", () => { | ||
| calculator.appendNumber(button.innerText) | ||
| calculator.updateDisplay() | ||
| }) | ||
| }) | ||
| operationButtons.forEach(button => { | ||
| button.addEventListener("click", () => { | ||
| calculator.chooseOperation(button.innerText) | ||
| calculator.updateDisplay() | ||
| }) | ||
| }) | ||
| equalsButton.addEventListener("click", button => { | ||
| calculator.compute() | ||
| calculator.updateDisplay() | ||
| }) | ||
| allClearButton.addEventListener("click", button => { | ||
| calculator.clear() | ||
| calculator.updateDisplay() | ||
| }) | ||
| deleteButton.addEventListener("click", button => { | ||
| calculator.delete() | ||
| calculator.updateDisplay() | ||
| }) | ||
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| @import url('https://fonts.googleapis.com/css?family=Orbitron&display=swap'); | ||
| @import url('https://fonts.googleapis.com/css?family=Montserrat&display=swap'); | ||
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| html{height:100%;} | ||
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| body { | ||
| background: rgb(162,159,139); | ||
| background: radial-gradient(circle, rgba(162,159,139,1) 0%, rgba(214,212,195,1) 0%, rgba(162,159,139,1) 100%); | ||
| } | ||
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| div.background{ | ||
| background-color:#55818D; | ||
| width: 290px; | ||
| min-height:500px; | ||
| position: center; | ||
| margin-top: 25px; | ||
| border-radius: 4%; | ||
| padding-top: 10px; | ||
| padding-bottom: 10px; | ||
| } | ||
| div.screen { | ||
| width:300px; | ||
| min-height: 120px; | ||
| max-height: 160px; | ||
| background-color: rgba(0,0,0,0.9); | ||
| border: 1px solid black; | ||
| font-family: 'Orbitron', sans-serif; | ||
| letter-spacing:2px; | ||
| text-align: right; | ||
| display: flex; | ||
| align-items: flex-end; | ||
| justify-content: space-around; | ||
| flex-direction: column; | ||
| padding: 10px; | ||
| word-wrap: break-word; | ||
| word-break: break-all; | ||
| overflow: hidden; | ||
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| } | ||
| div.previous-operand { | ||
| color: rgba(255,255,255,0.6); | ||
| font-size: 1.2rem; | ||
| } | ||
| div.current-operand { | ||
| color: white; | ||
| font-size: 2.0rem; | ||
| } | ||
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| button { | ||
| width:60px; | ||
| height:60px; | ||
| background-color: #172027!important; | ||
| font-family: 'Montserrat', sans-serif; | ||
| font-size: 1.4rem!important; | ||
| font-weight: bolder!important; | ||
| outline: none; | ||
| } | ||
| button:hover { | ||
| background-color: #283742!important; | ||
| border: 1px solid #283742!important; | ||
| } | ||
| button:active { | ||
| background-color: #475d6d!important; | ||
| border: 1px solid #475d6d!important; | ||
| } | ||
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| button.equals { | ||
| background-color: #fa5f18!important; | ||
| border: 1px solid #fa5f18!important; | ||
| } | ||
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| button.equals:hover { | ||
| background-color: #f7814a!important; | ||
| border: 1px solid #f7814a!important; | ||
| } | ||
| button.equals:active { | ||
| background-color: #f59b72!important; | ||
| border: 1px solid #f59b72!important; | ||
| } | ||
| button.clear { | ||
| color: rgb(236, 60, 60); | ||
| width: 128px; | ||
| } | ||
| button.clear:hover{ | ||
| color: rgb(250, 86, 86); | ||
| } | ||
| button.clear:focus{ | ||
| color: rgb(250, 103, 103); | ||
| } | ||
| button.clear:active { | ||
| color: rgb(250, 103, 103); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,9 @@ | ||
| "use strict"; | ||
| let items = []; | ||
| console.log("[]"); | ||
| console.log(items); | ||
| let animals = ["cat", "dog", "rabbit"]; | ||
| console.log(animals); | ||
| animals.push("piglet"); | ||
| console.log(animals); | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,7 @@ | ||
| "use strict"; | ||
| //Variables | ||
| let array1 = ["A", "B", "C", "D"]; | ||
| let array2 = [1, 2, 3, 4, 5, 6, 7]; | ||
| //Console log | ||
| console.log(array1.length); | ||
| console.log(array2.length); | ||
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,2 @@ | ||
| 'use strict' | ||
| console.log("I'm awesome"); |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,12 @@ | ||
| 'use strict' | ||
| console.log("Hello, world!");//English | ||
| console.log("Hola, mundo!");//Spanish | ||
| console.log("Ciao, mondo!");//Italian | ||
| console.log("Ola, mundo!");//Portuguese | ||
| console.log("こんにちは世界!");//Japanese | ||
| console.log("Selam Dünya!");//Turkish | ||
| console.log("Hallo Wereld!");//Dutch | ||
| console.log("Привет, мир!");//Russian | ||
| console.log("Hallo Welt!");//German | ||
| console.log("Salve mundi!");//Latin(!) | ||
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,7 @@ | ||
| 'use strict' | ||
| let numberX; | ||
| console.log("undefined"); | ||
| console.log(numberX); | ||
| numberX = 77; | ||
| console.log("The number I assigned to the variable:"); | ||
| console.log(numberX); |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,4 @@ | ||
| "use strict"; | ||
| //1. The answer is 1. The number 6 can be divided by 3 so the remainder after the division is 1. | ||
| //2. The answer is 1. The number 20 can be divided by 4 so the remainder after the division is 1. | ||
| //3. The answer is 1. The number 12 can be divided by 2 so the remainder after the division is 1. | ||
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There was a problem hiding this comment. Correct! Here is also the way you can find every remainder (including huge number): |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,7 @@ | ||
| 'use strict' | ||
| let myString = "Stefanos Leventis"; | ||
| console.log("My full name"); | ||
| console.log(myString); | ||
| myString = "The Arkitekt"; | ||
| console.log("My nickname as a music producer"); | ||
| console.log(myString); | ||
|
There was a problem hiding this comment. In line 2, the value of the variable In the line 6, same as above, the new value of the ;-D ...yeah yeah I know.... |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,7 @@ | ||
| 'use strict' | ||
| let z = 7.25; | ||
| console.log(z); | ||
| let a = Math.round(z); | ||
| console.log(a); | ||
| let x = Math.max(a, z); | ||
| console.log(x); |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,4 @@ | ||
| "use strict"; | ||
| let mySentence = "Programming is so interesting!"; | ||
| let howLongIsIt = mySentence.length; | ||
| console.log(howLongIsIt); |
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Good job but you forgot the last question of the exercise:
Write a conditional statement that checks if both are of equal length..., thus should also include in your code: