Merge pull request LaunchCodeEducation#15 from LaunchCodeEducation/exceptions

exceptions exercises and chapter examples

Author: jwoolbright23

exceptions/chapter-examples/finally/finally.js

@@ -0,0 +1,14 @@
+const input = require('readline-sync');
+
+let animals = [{name: 'cat'}, {name: 'dog'}];
+let index = Number(input.question("Enter index of animal:"));
+
+try {
+    console.log('animal at index:', animals[index].name);
+} catch(TypeError) {
+    console.log("We caught a TypeError, but our program continues to run!");
+} finally {
+    console.log("You tried to access an animal at index:", index);
+}
+
+console.log("the code goes on...");

exceptions/chapter-examples/finally/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "control-flow-type-error-finally",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "readline-sync": "^1.4.10"
+  }
+}

exceptions/chapter-examples/throw-default-error.js

@@ -0,0 +1 @@
+throw Error('You cannot divide by zero!');

exceptions/chapter-examples/try-catch/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "control-flow-type-error",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "readline-sync": "^1.4.10"
+  }
+}

exceptions/chapter-examples/try-catch/try-catch.js

@@ -0,0 +1,13 @@
+const input = require('readline-sync');
+
+let animals = [{name: 'cat'}, {name: 'dog'}];
+let index = Number(input.question("Enter index of animal:"));
+
+try {
+    console.log('animal at index:', animals[index].name);
+} catch(TypeError) {
+    console.log("We caught a TypeError, but our program continues to run!");
+    console.log("You tried to access an animal at index:", index);
+}
+
+console.log("the code goes on...");

exceptions/exercises/divide.js

@@ -0,0 +1,7 @@
+// Write a function called 'divide' that takes two parameters: a numerator and a denominator.
+
+// Your function should return the result of numerator / denominator.
+
+// However, if the denominator is zero you should throw the error, "Attempted to divide by zero."
+
+// Code your divide function here:

exceptions/exercises/test-student-labs.js

@@ -0,0 +1,24 @@
+function gradeLabs(labs) {
+  for (let i=0; i < labs.length; i++) {
+    let lab = labs[i];
+    let result = lab.runLab(3);
+    console.log(`${lab.student} code worked: ${result === 27}`);
+  }
+}
+
+let studentLabs = [
+  {
+    student: 'Carly',
+    runLab: function (num) {
+        return Math.pow(num, num);
+    }
+  },
+  {
+    student: 'Erica',
+    runLab: function (num) {
+        return num * num;
+    }
+  }
+];
+
+gradeLabs(studentLabs);