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Commit 36144b5

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4 files changed

+193
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4 files changed

+193
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lines changed

‎Loops2.js‎

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var arr = [23, 45, 67, 56, 78, 21, 12]
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var arr1 = []
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var arr2 = []
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var arr3 = []
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let str = ''
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for(let i of arr)
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{
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arr1.push(i)
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}
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arr.forEach(i=>{
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str = str + i +','
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})
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for(let i=arr.length-1;i>=0;i--)
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{
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arr3.push(arr[i])
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}
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console.log(arr1)
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console.log(arr2)
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console.log(arr3)
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console.log(str)

‎basics1_Variables.js‎

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console.log("Hello World");
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let a = 4
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const b = 5.67
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var c = "Ambuja"
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let d = true;
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const e = null;
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let f;
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console.log(typeof(a));
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console.log(typeof(b));
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console.log(typeof(c));
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console.log(typeof(d));
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console.log(typeof(e));
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console.log(typeof(f));
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console.log(!d);
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const t1 = Symbol(7878)
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console.log(t1)
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console.log(t1.description)
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console.log(t1.toString)
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const student = {
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fname: 'Chitta',
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lname: 'Swain',
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age: 34,
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weight: '78'
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}
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student.fname = 'Ranjan'
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console.log(student.fname)
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console.log(student)
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console.log(typeof(student.age))
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console.log(typeof(student.fname))
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console.log(++student.age)
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console.log(2=='2')
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console.log(2==='2')
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console.log(student.fname=='Ranjan')
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delete student.fname
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console.log(student.fname)
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console.log(student)
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console.log(Number(student.weight))
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console.log(student.weight===78)
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console.log(student.weight===String(78))
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console.log(student.age.toString())
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console.log(parseInt('20.66'))
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var aa = parseFloat('20.66')
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console.log(typeof(aa))
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‎basics2_Loops.js‎

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const flag = true;
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if(!flag)
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{
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console.log("Condition met !");
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}
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else{
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console.log("Condition not met !");
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}
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let i=0;
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while(i<100)
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{
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console.log(i);
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i++;
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}
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let a=0;
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do{
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console.log("inside do while loop");
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a++;
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}while(a<10)
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for(let k=1;k<=100;k++)
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{
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if(k%2==0 && k%5==0)
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{
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console.log(k)
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}
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}
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‎basics3_Arrays.js‎

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var marks = Array(6);
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var marks = new Array(20,34,45,56,67,78);
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var list = [20,34,45,56,67,78];
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var list1 = [];
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console.log(list[2]);
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list1[0]=10;
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console.log(list.length);
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list1.push(20); // Add an element at the end
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console.log(list1[1]);
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list.pop(); //delete last added element
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console.log(list);
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list1.unshift(5); //Add an element as the start
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console.log(list1);
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console.log(marks.indexOf(45)); //in which index the value is
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console.log(marks.includes(123)); //check whether the element is part of that array or not
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submarks = marks.slice(2,5); //Will print from 2 to 4 in marks array
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console.log(submarks);
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//Add all the elements present in the array
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var sum=0;
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for(let i=0;i<marks.length;i++)
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{
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//console.log(marks[i]);
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sum=sum+marks[i]
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}
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console.log(sum);
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//reduce filter map
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let TotalMark = marks.reduce((sum,TotalMarks)=>sum+TotalMarks,0);
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console.log(TotalMark);
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//Print even numbers
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var scores = [12,13,14,16]
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var nscores=[];
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for(let i=0;i<scores.length;i++)
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{
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if(scores[i]%2==0)
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nscores.push(scores[i]);
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}
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console.log(nscores);
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//Now lets do the same using filter method
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let newFilterScores = scores.filter(score=>score%2==0);
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//it is filtering all the element on a certain condition
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console.log(newFilterScores);
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//Map Array function - - Array multiplied by 3 - [36,42,48]
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let newMultArr = newFilterScores.map(score=>score*3);
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//it is mapping all the elements by a certain operation
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console.log(newMultArr);
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let TotalVal = newMultArr.reduce((sum,eachVal)=>sum+eachVal,0); //Now sum them
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console.log(TotalVal);
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//We can use filter, map, reduce in a sequence also - like below
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let finalVal = scores.filter(score=>score%2==0).map(score=>score*3).reduce((sum,eachVal)=>sum+eachVal,0)
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console.log(finalVal);
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//Sorting an array with Strings
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//Sorting an array with Numbers
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let fruits = ["banana","kiwi","apple","jamun","papaya"]
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fruits.sort();
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console.log(fruits);
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console.log(fruits.reverse());
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var list = [20,13,34,23,45,44,56,102,67,78];
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console.log(list.sort()); //This sorts as per the digit value
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console.log(list.sort((a,b)=>a-b)); // This is bubble sort
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console.log(list.sort((a,b)=>b-a)); // in reverse order
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