resolvendo exercicios do dia 1

solutions/day-01/script.js

@@ -0,0 +1,72 @@
+// Exercise: Level 1
+
+const countries = [
+    'Albania',
+    'Bolivia',
+    'Canada',
+    'Denmark',
+    'Ethiopia',
+    'Finland',
+    'Germany',
+    'Hungary',
+    'Ireland',
+    'Japan',
+    'Kenya',
+  ]
+  
+  const webTechs = [
+    'HTML',
+    'CSS',
+    'JavaScript',
+    'React',
+    'Redux',
+    'Node',
+    'MongoDB',
+  ]
+
+// Declare an empty array;
+const emptyArray = [];
+
+// Declare an array with more than 5 number of elements
+const arrayWithFiveElements = [5, 4, 3, 2, 1];
+
+// Find the length of your array
+arrayWithFiveElements.length;
+
+// Get the first item, the middle item and the last item of the array
+const firtItem = arrayWithFiveElements[0];
+const middleItem = arrayWithFiveElements[Math.floor(arrayWithFiveElements.length / 2)];
+const lastItem = arrayWithFiveElements[arrayWithFiveElements.length - 1];
+
+// Declare an array called mixedDataTypes, put different data types in the array and find the length of the array. The array size should be greater than 5
+const mixedDataTypes = ['hi', 5, true, 'book', { 1: 5, 2: 3, 3: 2}, 4, 1];
+mixedDataTypes.length;
+
+// Declare an array variable name itCompanies and assign initial values Facebook, Google, Microsoft, Apple, IBM, Oracle and Amazon
+let itCompanies = ['Facebook', 'Google', 'Microsoft', 'Apple', 'IBM', 'Oracle','Amazon'];
+
+// Print the array using console.log()
+console.log(itCompanies);
+
+// Print the number of companies in the array
+console.log(itCompanies.length);
+
+// Print the first company, middle and last company
+const firstCompany = itCompanies[0];
+const middleCompany = itCompanies[Math.floor(itCompanies.length / 2)];
+const lastCompany = itCompanies[Math.floor(itCompanies.length - 1)]
+
+// Print out each company
+// Change each company name to uppercase one by one and print them out
+// Print the array like as a sentence: Facebook, Google, Microsoft, Apple, IBM,Oracle and Amazon are big IT companies.
+// Check if a certain company exists in the itCompanies array. If it exist return the company else return a company is not found
+// Filter out companies which have more than one 'o' without the filter method
+// Sort the array using sort() method
+// Reverse the array using reverse() method
+// Slice out the first 3 companies from the array
+// Slice out the last 3 companies from the array
+// Slice out the middle IT company or companies from the array
+// Remove the first IT company from the array
+// Remove the middle IT company or companies from the array
+// Remove the last IT company from the array
+// Remove all IT companies