Merge d21d6a30a0 into 09f408a1b7

01_Day_JavaScript_Refresher/01_javascript_refresher.md

@@ -236,7 +236,7 @@ Open the browser console to see the output from the console.log()
 #### External Script
 
 Similar to the internal script, the external script link can be on the header or body, but it is preferred to put it in the body.
-First, we should create an external JavaScript file with .js extension. All files ending with .js extension. All files ending with .js extension are JavaScript files. Create a file named introduction.js inside your project directory and write the following code and link this .js file at the bottom of the body.
+First, we should create an external JavaScript file with .js extension. All files ending with .js extension are JavaScript files. Create a file named introduction.js inside your project directory and write the following code and link this .js file at the bottom of the body.
 
 ```js
 console.log('Welcome to 30DaysOfJavaScript')

solutions/day-01/arraysExercise1.js

@@ -0,0 +1,60 @@
+// declare empty array
+let arr = new Array();
+let arr1 = new Array(6)
+
+// find length of array
+console.log(arr1.length)
+
+// get the first, middle and last item of the array
+arr1 = [1,2,3,4,5,6]
+let first = arr1[0];
+let last = arr1[arr1.length-1] 
+let middle = arr1[arr1.length/2-1]
+
+console.log(`first: ${first} \nmiddle: ${middle} \nlast: ${last}`)
+
+// 
+itCompanies = ['Facebook','Google','Microsoft','Apple','IBM','Oracle','Amazon']
+console.log(itCompanies)
+
+// print each company
+for(const company of itCompanies){
+    console.log(company)
+}
+
+console.log("\n")
+
+itCompanies.forEach(element => {
+    console.log(element)
+});
+
+// change the company name to uppercase and print one by one
+itCompanies.forEach(element => {
+    element = element.toUpperCase()
+    console.log(element)
+});
+
+let company1 = 'Amazon'
+let company2 = 'PayPal'
+
+if(itCompanies.includes(company2)){
+    console.log("The IT company is " + company1)
+}
+else{
+    console.log("It is not an IT company")
+}
+
+// Filter out companies which have more than one 'o' without the filter method
+
+// sort the array using sort method - the sorting is based on alphabetical order
+console.log(itCompanies.sort())
+
+// slicing the first three companies from the array
+console.log(itCompanies.splice(0,3))
+
+// slicing the last three companies from the array
+console.log(itCompanies.splice(arr.length-3))
+
+// -----------------------------------------------------------------------------
+// EXERCISE: LEVEL 2
+

solutions/day-01/practicing-data-types.js

@@ -0,0 +1,108 @@
+let challenge = '30 Days of JavaScript'
+console.log(challenge)
+console.log(challenge.length)
+
+let capital = challenge.toUpperCase()
+let small = challenge.toLowerCase()
+
+let firstWord = challenge.substring(0,2)
+console.log(firstWord)
+
+let phrase = challenge.replace("30 ","")
+console.log(phrase)
+
+// includes check if the string contains a specified substring
+let containsScript = challenge.includes("Script")
+console.log("Does string contains Script? " + containsScript)
+
+// split string to array using split()
+let arr = challenge.split(" ")
+console.log(arr)
+
+// split the string at the comma and change it to an array.
+let companyName = "Facebook, Google, Microsoft, Apple, IBM, Oracle, Amazon"
+let compArr = companyName.split(",")
+console.log(compArr)
+
+// What is character at index 15 in '30 Days Of JavaScript' string? Use charAt() method.
+const charAt15 = challenge.charAt(15)
+console.log(charAt15)
+
+// What is the character code of J in '30 Days Of JavaScript' string using charCodeAt()
+const indexOfJ = challenge.indexOf("J")
+const charCodeOfJ = challenge.charCodeAt(indexOfJ)
+console.log(charCodeOfJ)
+
+// determine the first index of "a"
+const firstIndexOfa = challenge.indexOf("a")
+console.log(firstIndexOfa)
+
+const sentence = "You cannot end a sentence with because because because is a conjunction"
+
+const firstIndexOfbecause = sentence.indexOf("because")
+const lastIndexOfbecause = sentence.lastIndexOf("because")
+
+console.log(`first occurence: ${firstIndexOfbecause} and lastIndex: ${lastIndexOfbecause}`)
+
+// match "a" in the string
+const pattern = /a/g;
+const matches = challenge.match(pattern)
+if(matches){
+    for(const mat of matches){
+        console.log(mat)
+    }
+}
+
+let challenge2 = ("30 Days of").concat("JavaScript")
+console.log(challenge2)
+
+console.log(challenge.repeat(2))
+
+// -------------------------------------------------------------------
+// Level 2
+console.log("The quote 'There is no exercise better for the heart than reaching down and lifting people up.' by John Holmes teaches us to help one another.")
+
+// Check if typeof '10' is exactly equal to 10. If not make it exactly equal.
+console.log('"Love is not patronizing and charity isn\'t about pity, it is about love. Charity and love are the same -- with charity you give love, so don\'t just give money but reach out your hand instead."')
+if(typeof "10" === typeof 10){
+    console.log("They both are equal")
+}
+else{
+    if(typeof(parseInt("10")) === typeof 10){
+        console.log("They are made equal")
+    }
+}
+
+// Check if 'on' is found in both python and jargon
+if(("python").includes("on") && ("jargon").includes("on")){
+    console.log("They both include 'on'")
+}
+
+let randomNumber = Math.floor(Math.random()*101);
+console.log(randomNumber)
+
+// random number between 51 and 100
+let randomNumber2 = Math.floor(Math.random()*50 + 51)
+console.log(randomNumber2)
+
+// random number between 0 and 255
+let randomNumber3 = Math.floor(Math.random()*256)
+
+// random number between 0 and length of the string
+let randomIndex = Math.floor(Math.random()*("JavaScript").length)
+let randomChar = "JavaScript".charAt(randomIndex)
+console.log(randomChar)
+
+// creating a pattern
+console.log(
+    "1\t1\t1\t1\t1\t\n2\t1\t2\t4\t8\t \n"
+)
+
+// 'Love is the best thing in this world. Some found their love and some are still looking for their love.' Count the number of word love in this sentence.
+const sentence2 = 'Love is the best thing in this world. Some found their love and some are still looking for their love.'
+let pattern1 = /love/g;   // the 'g' is to search in the entire string
+let pattern2 = /love/gi;  // the 'i' is for case sensitive
+let arr1 = sentence2.match(pattern)
+let arr2 = sentence2.match(pattern2)
+console.log(arr1.length)
+console.log(arr2.length)

solutions/day-01/tempCodeRunnerFile.js

@@ -0,0 +1,5 @@
+if(itCompanies.includes(company1)){
+//     console.log("The IT company is" + company1)
+// }
+// else{
+//     co