Introduction to JavaScript

Author: felipevcc

README.md

@@ -20,6 +20,7 @@ Repository with several projects and programming exercises in Python and SQL car
 * [SQL - Introduction](./SQL_introduction)
 * [SQL - More queries](./SQL_more_queries)
 * [Python - Object-relational mapping](./python-object_relational_mapping)
+* [JavaScript - Warm up](./javascript-warm_up)
 
 ## Author
 * Felipe Villamizar - [GitHub](https://github.com/felipevcc)

javascript-warm_up/0-javascript_is_amazing.js

@@ -0,0 +1,4 @@
+#!/usr/bin/node
+// Prints a str
+const myVar = 'JavaScript is amazing';
+console.log(myVar);

javascript-warm_up/1-multi_languages.js

@@ -0,0 +1,5 @@
+#!/usr/bin/node
+// Prints 3 lines
+console.log('C is fun');
+console.log('Python is cool');
+console.log('JavaScript is amazing');

javascript-warm_up/10-factorial.js

@@ -0,0 +1,11 @@
+#!/usr/bin/node
+// Computes and prints a factorial
+const num = parseInt(process.argv[2]);
+function factorial (n) {
+  if (!n) {
+    return 1;
+  } else {
+    return n * factorial(n - 1);
+  }
+}
+console.log(factorial(num));

javascript-warm_up/11-second_biggest.js

@@ -0,0 +1,19 @@
+#!/usr/bin/node
+// Searches the secord biggest integer in args
+const args = process.argv.slice(2);
+if (args.length < 2) {
+  console.log(0);
+} else {
+  let biggest = Number.MIN_SAFE_INTEGER;
+  let secBiggest = Number.MIN_SAFE_INTEGER;
+  for (let i = 0; i < args.length; i++) {
+    const num = parseInt(args[i]);
+    if (num > biggest) {
+      secBiggest = biggest;
+      biggest = num;
+    } else if (num > secBiggest) {
+      secBiggest = num;
+    }
+  }
+  console.log(secBiggest);
+}

javascript-warm_up/12-object.js

@@ -0,0 +1,11 @@
+#!/usr/bin/node
+// Replace a value in myObject
+const myObject = {
+  type: 'object',
+  value: 12
+};
+console.log(myObject);
+
+myObject.value = 89;
+
+console.log(myObject);

javascript-warm_up/13-add.js

@@ -0,0 +1,5 @@
+#!/usr/bin/node
+// Export a function that returns an addition
+exports.add = function (a, b) {
+  return a + b;
+};

javascript-warm_up/13-main.js

@@ -0,0 +1,4 @@
+#!/usr/bin/node
+// Call a function that is in another file
+const add = require('./13-add').add;
+console.log(add(3, 5));

javascript-warm_up/2-arguments.js

@@ -0,0 +1,10 @@
+#!/usr/bin/node
+// Prints a msg depending of the number of args passed
+const args = process.argv;
+if (args.length === 3) {
+  console.log('Argument found');
+} else if (args.length > 3) {
+  console.log('Arguments found');
+} else {
+  console.log('No argument');
+}

javascript-warm_up/3-value_argument.js

@@ -0,0 +1,8 @@
+#!/usr/bin/node
+// Prints the first argument passed
+const args = process.argv;
+if (args[2]) {
+  console.log(args[2]);
+} else {
+  console.log('No argument');
+}