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solutions/day-01/countries.mjs

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+const countries = [
+    'Albania',
+    'Bolivia',
+    'Canada',
+    'Denmark',
+    'Ethiopia',
+    'Finland',
+    'Germany',
+    'Hungary',
+    'Ireland',
+    'Japan',
+    'Kenya',
+  ]
+  export default countries

solutions/day-01/level1.js

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+let arr1 = []
+  let arr2 = [10,20,30,40,50,60,70]
+  console.log(arr2.length)
+  console.log(arr2[0])
+  console.log(arr2[Math.floor((arr2.length-1)/2)])
+  console.log(arr2[arr2.length-1])
+
+  let mixedDataTypes = [1,"Ashim",['Apple','Mango','Jackfruit'],true,3.14,333]
+  console.log(mixedDataTypes.length)
+
+  let itCompanies = ["Facebook", "Google" , "Microsoft" , "Apple" , "IBM" , "Oracle", "Amazon", "Jio"]
+  console.log(itCompanies)
+  console.log("there are " + itCompanies.length + " IT Companies")
+  console.log("The first company is "+ itCompanies[0])
+  console.log("The last company is "+ itCompanies[itCompanies.length-1])
+  console.log("The middle company is "+ itCompanies[Math.floor((itCompanies.length-1)/2)])
+  console.log("All the IT companies are :"+ itCompanies.join(", "))
+  console.log(itCompanies[0].toUpperCase())
+  console.log(itCompanies[1].toUpperCase())
+  console.log(itCompanies[2].toUpperCase())
+  console.log(itCompanies[3].toUpperCase())
+  console.log(itCompanies[4].toUpperCase())
+  console.log(itCompanies[5].toUpperCase())
+console.log(itCompanies.toString())
+
+let index = itCompanies.includes("Apples")
+
+if(index){
+    console.log("The Item exists in the array")
+}else{
+    console.log("The Item does not exist")
+}
+let  reqComp = [];
+for(let i = 0 ; i < itCompanies.length ; i++){
+    if(itCompanies[i].includes('o')){
+       let company =  itCompanies[i].toLowerCase().split('')
+       //console.log(company)
+       let count = 0;
+       for(let j = 0 ; j < company.length ; j++){
+        if(company[j] == 'o'){
+         count += 1;
+        }
+       }
+       if(count > 1){
+        reqComp.push(itCompanies[i])
+      }
+    }
+}
+console.log(reqComp)
+
+console.log(itCompanies.sort())
+console.log(itCompanies.reverse())
+
+onsole.log(itCompanies.slice(0,3))
+//console.log(itCompanies.splice(4,))
+let length = itCompanies.length
+let lower = Math.floor((length-1)/2)
+let upper = Math.ceil((length-1)/2)
+console.log(lower)
+console.log(upper)
+console.log(itCompanies.slice(lower , upper+1))
+
+itCompanies.splice(0,1)
+console.log(itCompanies)
+
+let floorMid = Math.floor((length-1)/2)
+let ceilMid = Math.ceil((length-1)/2)
+if(length%2 == 0){
+    itCompanies.splice(floorMid,2)
+}else{
+    itCompanies.splice(floorMid,1)
+}
+console.log(itCompanies)
+
+itCompanies.splice(itCompanies.length-1,1)
+console.log(itCompanies)
+
+itCompanies.splice(0)
+console.log(itCompanies)

solutions/day-01/level2.mjs

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+import webTechs from "./web_techs.mjs";
+import countries from "./countries.mjs";
+
+// console.log(webTechs)
+// console.log(countries)
+
+let text =
+  'I love teaching and empowering people. I teach HTML, CSS, JS, React, Python.'
+
+  let words = text.split(" ") 
+console.log(words)
+console.log(words.length)
+
+const shoppingCart = ['Milk', 'Coffee', 'Tea', 'Honey']
+
+if(shoppingCart[0]!="Meat"){
+    shoppingCart.unshift("Meat")
+}console.log(shoppingCart)
+
+if(shoppingCart[shoppingCart.length-1]!="Sugar"){
+    shoppingCart.push("Sugar")
+}console.log(shoppingCart)
+
+
+const Allergy = true
+
+if(Allergy==true){
+    let i = shoppingCart.indexOf('Honey')
+    shoppingCart.splice(i,1)
+}console.log(shoppingCart)
+
+let index = shoppingCart.indexOf('Tea')
+shoppingCart[index] = 'Green Tea'
+console.log(shoppingCart)
+
+if(countries.includes("Ethiopia")){
+    console.log("ETHIOPIA")
+}else{
+    countries.push('Ethiopia')
+}
+
+if(webTechs.includes('Sass')){
+    console.log("sass is a css preprocessor")
+}else{
+    webTechs.push("Sass")
+}console.log(webTechs)
+
+const frontEnd = ['HTML', 'CSS', 'JS', 'React', 'Redux']
+const backEnd = ['Node', 'Express', 'MongoDB']
+let fullStack = frontEnd.concat(backEnd)
+console.log(fullStack)

solutions/day-01/web_techs.mjs

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+const webTechs = [
+    'HTML',
+    'CSS',
+    'JavaScript',
+    'React',
+    'Redux',
+    'Node',
+    'MongoDB',
+  ]
+ export default webTechs