Join the two data structures together, and thereafter find the lowest and the largest number literal from the combined number literals. "price":2.5 If the two values are the same, then return triples their sum. In doing so,use a case class to represent a Car type that needs to have a name property of typeString, and a price property of type Double. Due to it is recommendable use the main method , we create another file called DataFrame2.scala. Output: Write a Scala program to get the absolute difference between n and 51. Technology and Finance Consultant with over 14 years of hands-on experience building large scale systems in the Financial (Electronic Trading Platforms), Risk, Insurance and Life Science sectors. To verify your uuid method, you can define thefollowing car sample: More Scala User-defined Functions Programs Scala program to print numbers from 1 to 10 using while, do-while, and for loop, Scala program to implement infinite loop using while and do-while loop, Scala program to demonstrate the nested while and do-while loop, Scala program to demonstrate the break statement in while and do-while loop, Scala program to execute do-while loop at least 1 time on false condition, Scala program to demonstrate the match statement, Scala program to return match case value from a method, Scala program to read a weekday number and print weekday name using match case, Scala program to check the given character is vowel and consonant, Scala program to implement an arithmetic calculator using a match case, Scala program to find the odd occurrences in an array, Scala program to convert multiline strings to an array. Click me to see the sample solution, 19. Write a Scala program to check whether one of the given temperatures is less than 0 and the other is greater than 100. Go to the editor Next, create a new class named VehicleInventorServicethat has a type parameter for all sub-types of Vehicle. First Name: Nadim Click me to see the sample solution, 18. We create a file called Repartition1.scala, We create a file called Repartition2.scala. Besides the "BasketValidator" class, you should also define its companion object, along withthe relevant apply() method. You can assume that the price of each Glazed donut item is at $2.50. [An editor is available at the bottom of the page to write and execute the scripts. Java 3 chocolate biscuits at $3.99 each Next, create two case classes, named, Car, and Bike, to model a given Vehicle -using, of course, the Vehicle type. 5 cupcakes at $4.99 each. Output:SESICREXE-ALACS/MOC.ALACSTUOBALLA//:PTTH. Solution: Problem 4: Create a Scala program to find the 8th character in the String: "http://allaboutscala". Common items are: Problem 11:Assume a shopping basket with the following items: "Milk", "Cheese", "Donuts", "Apples", "Bananas". a car whose make is: bmw 3 series Define another method named "toLower" which accepts a String as input parameterand formats the input to lower case as output. Adding Lollipop(Lollipop) to shopping cart - bmw car 5 series & ans. , please select source and choose scala version 2.12.12 and press finish and choose the new project in a new window. - a vw passat priced at 10,000 If you do not have Apache Hadoop installed, follow this link to download and install. Adding oops something is not right! "Vest", "Small", 5.99 In order to start a shell, go to your SPARK_HOME/bin directory and type " spark-shell2 ". Solution: Problem 7:Create a Scala program to output your name and favorite movie. pen is required in the classroom. Calculating cost for Chocolate, quantity = 10 car uuid = vw golf - 790852193 Jill is a primary school student of 8 years old and whose type should be the PrimarySchoolStudent class. vehicleA = honda bike firestorm Output: How to get the first element of list in Scala? Output: Donut Purchased: 10, Problem 9: Create a Scala program and use an appropriate data structure to present the following key and value pairs of children and their ages: Bill is 9 years old, Jonny is 8 years old, Tommy is 11 years old, and Cindy is 13 years old. Note that the printVehicles() method willhave no return type defined as such. 25 Scala programs / examples: This section contains solved Scala programs/examples on the various topics such as basic programs, conditions & control statement-based programs, looping programs, array & string programs, structure programs, function & package-based programs, etc. Next, you should extend - so to speak - the Car typeby having a uuid method, but without modifying the source code of the Car class. Write a Scala program to check which number is nearest to the value 100 among two given integers. Output: You can use whichever data structure from thestandard Scala collection types. combines functional programming and object-oriented programming. This command loads the Spark and displays what version of Spark you are using. partitions in a uniform way. You should of course also create a List data structure to store the above-mentioned students. Let us assume you have already installed property Intellij and winutils for Spark on your computer and downloaded spark you can follow this tutorial. 100 joe Scala . Then, use an appropriate data structure to capture the following numeric values: 10, 77, 90, 50, 100, 110. polo-shirt is priced at $4.99 for the Large size. Checking vehicle stock for vehicle = Bike(honda bike firestorm) Go to the editor vehicleB = bmw car 5 series checking stock for vehicle = Car(mazda 3 series) With the above objects created, create an object, or instance, of the VehicleInventorySystem,and pass-through the bmw car to the create() method, the mazda car to the read() method,the honda bike to the update() method, and the bmw bike to the delete method. The format for each coupon code should be as follows: "coupon code - i", where thenumber i is derived from the length of each corresponding coupon code. Output: Transformations output is an input of Actions. Usean appropriate data structure, and store the above-mentioned students. Thereafter you should define analiased type named CarStock that will in effect, alias, Scala's Tuple2 typeand represent a tuple or pair of Car and Int. Making vehicle = bmw car 5 series Using the typesfrom the previous scala exercises - that is, the Donut, VanillaDonut, GlazedDonut, and Pastry classes -try to define a Pastry object that has an upper type bound to the Lollipop type. Finally, create an object, or instance, of the VehicleInventorSystem and call the create(), read(), update(), and delete() methods by passing through a "bmw 3 series" car, "mazda 3 series" car, a "honda bike firestorm", and a "bmw bike r 2000". Go to the editor - a mazda 3 priced at 15,000 DDDD - 4 Write a Scala program to check two given integers whether either of them is in the range 100..200 inclusive. Finally, output all itemswith the literal " is required in the classroom.". SEO Found a valid item = Cupcake Update vehicle = Vehicle(bmw car 5 series) Create vehicle = Vehicle(bmw car 5 series) : Next, extend the VehicleInventory traitwith a class named VehicleInventorySystem that will, of course, provideimplementation details to the create(), read(), update(), and delete() methods from theVehicleInventory trait. Output: - Joe who is a secondary student and is 14 years old. and as you see you can run this program because you have already loaded the libraries. Scala programs / examples: This section contains solved Scala programs/examples on the various topics such as basic programs, conditions & control statement-based programs, looping programs, array & string programs, structure programs, function & package-based programs, etc. checking stock for vehicle = Bike(honda bike firestorm) It further defines the following methods: create(), read(), update(), delete(), and each of the methods have a Vehicle type as input parameter, and with no return type. Removing vehicle = Bike(bmw bike r 2000), Problem 23:In this Scala exercise, we will reuse most of the constructs from the previous exercise,and extend it to focus on one - out of the many - built-in patterns for dependency injectionin Scala. Certificates Return true if 1 or more of them are in the said range otherwise false. to shopping cart It is recommended to do these exercises by yourself first before checking the solution. You should omit the last numeric item of 150, and each numeric item should have a 10 numeric interval. Output: Define a trait named VehicleInventory that will define the methods only - that is, without anyimplementations - for typical Create, Read, Update, and Delete (CRUD) methods nsmed create(), read()update(), and delete(). This book is on our 2020 roadmap in collaboration with a leading data scientist. If there is nocouponCode parameter, then the total cost for a given CartItem will be basically the associatedprice of the CartItem multiplied by its quantity. T-SHIRT is priced at $10.99 for the Medium size. For your Scala program, you can thereafter define the following students, and whileexplicitly defining their types: buying vehicle Bike(honda bike firestorm) Spark RDD reduceByKey() transformation is used to merge the values of each key using an associative reduce function. Modify the VehicleMaker class from the previous Scala exercise, and make its constructorargument optional, and do remember that the VehicleMaker had a type parameter with aconstraint to the Vehicle type. Using cache() and persist() methods, Spark provides an optimization mechanism to store the intermediate computation of a Spark DataFrame so they can be reused in subsequent actions. As a hint or tip, you should keep in mind that the type parameter for the School classshould make use of Scala's built-in variance features in order to restrict only types and sub-typesof the abstract Student class. Finally, you should output each car's uuid methodas shown below. Each of the methods should further simply output some print statements of its respective operations as per the output below. Problem 13:Write a Scala program and use the Tuple type to represent items in a shopping baskets: It is recommended to do these exercises by yourself first before checking the solution. Name Jack is valid = true Go to the editor Java let back to the class lets use the navigate to test action. Favorite snack is cupcake, name = Jill is 10 years old. JACK, Problem 7:Write a Scala program and use a case class structure to represent the followingstudents: (1) John who is 7 years old, (2) Jack who is 13 years old, (3) Joe who is15 years old, (4) Jill who is 15 years old, and (5) James who is 11 years old. Write a Scala program to convert the last 4 characters of a given string in upper case. C# DBMS Student(James,11) However in the case of Apache Spark jobs, documentation states that applications should define a main() method instead of extending scala.App. bmw g 310 r bike How to count the number of characters in a string in Scala? Example programs on Scala programming Language Scala program to print your name. Next,create a singleton object named VehicleReport that will define a printVehicles methodthat will have as input a List of Vehicle types, and any of its sub-types or sub-classes. Discussion. The student Joe now wants to add his favorite snack and it is a cupcake. For this task we have used Spark on Hadoop YARN cluster. BB - 2 Furthermore, and unlike the previous scala practice exercise, you should usean implicit class as opposed to an implicit function to solve this particularproblem set. Cloud Computing The VehicleMaker class should have a make() method with a generic return type V - that is, of course,based from and relative to its class type parameter. SparkSession it is an entry point to underlying Spark functionality in order to programmatically create Spark RDD, DataFrame and DataSet. The second example foreach(f: (T) Unit): Where unit Iterates all elements in the dataset by applying function f to all elements. [SecondarySchoolStudent] - name: Jack - age: 15 You should usea case class to model a Car object with a name property of type String, and a priceproperty of type Double. - a vw golf with price of 12,000 and stock of 50 As a tip, there is no need to manually create a data structure to representall the number literals, such as, 300, 301, 302, etc. - a bmw 5 series with price of 50,000 and stock of 75 Data Structure The former is obviously the above-mentionedCar type, and the Int type represents the current stock inventory for a particular Car item. Go to the editor Scala, an acronym for "scalable language," is a general-purpose, concise, high-level programming language that combines functional programming and object-oriented programming. You can use the following List data structure as your inputto the above-mentioned "validate" method: List("Cupcake", 2.99, 100L, 7, "Ice Cream"). Write a Scala program to check whether two given positive integers have the same last digit. Go to the editor The "validate" method should identify items of type String, Double and Int. Return 0 if the two numbers are equal. Next, create a singleton object named ShoppingCart and define a totalCost() methodthat has two parameters - the first is the above CartItem type, and the second is a couponCodeof type String, but which is optional. Read vehicle = Car(mazda 3 series) Click me to see the sample solution, 24. Output: If the length of the string has less than 4 then uppercase all the characters. Code samples demonstrate concepts along the way. CS Basics Favorite snack is chocolate. Features of Scala. "T-Shirt", "Medium", 10.99 The Car type itself has two further subsequent sub-types, namely, a BmwCarand a MazdaCar. "James", 7, The return type of the totalCost() method will be aDouble type. Click me to see the sample solution, 9. The uuid method should have an output with the combined car name and the car name's hashCode. Android Lowest number literal = -1.0 HR Privacy policy, STUDENT'S SECTION Narrow transformations are the result of map() and filter() functions and these compute data that live on a single partition meaning there will not be any data movement between partitions to execute narrow transformations. car uuid = vw passat - 44703299 Scala Stands for Scalable Language. JavaScript Output: car uuid = vw passat - 44703299 Output: In the previous code we have created an application by using the main(), we have initialized SparkSession. Output: 10, 11, 12 as String literals = 10 :: 11 :: 12, Problem4:Write a Scala program and create a class that will be called BasketValidator. CS Organizations spark-shell create RDD The best way we learn anything is by practice and exercise questions. Use an appropriate data structure from Scala's collection types to storethe above car sample. Create a method named orderByLowestStock which will have as input the Collectiondata structure of cars to stock, and will order the car items from the collectionby the lowest or minimum stock quantity. Output: 2 3 4 Spread the word Books - a bmw 3 series priced at 20,000 You can use the following vehicle samples to modelyour data points: A tag already exists with the provided branch name. C#.Net The String is of course to illustrate the point that you have to understand the lower type bound constraint, and determine that it is right for your particular use case. The output for yourScala program should be as follows: Next, you should use an implicit function thatdefines a uuid method for each Car object, but without manually modifying the aboveCar type and definition. In addition, create another method named makeBikes() that also has twoinput parameters for two Vehicle types. bmw 5 series stock = 75 Output:Does magic number 77 exist within the numerical value of 10,77,90,50,100,110? Name: Nadim Bahadoor - a bmw 5 series priced at 50,000 - a bmw 3 series with price of 20,000 and stock of 200 "Bob", 13, 10, Problem 8:Write a Scala program and use a Sequence data structure to store a combination of names to ages as follows: You should then define a create the following car stock items, and use an appropriatedata structure from Scala's Collection types. For Double types, it will output: "Item [the item]of type Double is not valid". Java name = John, age = 8 Spark Context Ajax More Scala scala.math Package Programs Scala program to read data from a text file, Scala program to read data from a file line by line, Generally Accepted Accounting Principles MCQs, Marginal Costing and Absorption Costing MCQs, Run-length encoding (find/print frequency of letters in a string), Sort an array of 0's, 1's and 2's in linear time complexity, Checking Anagrams (check whether two string is anagrams or not), Find the level in a binary tree with given sum K, Check whether a Binary Tree is BST (Binary Search Tree) or not, Capitalize first and last letter of each word in a line, Greedy Strategy to solve major algorithm problems. * We are creating our first scala class Go to the editor Number literals in set one but not in set two = HashSet(5, 10, 1, 3) Aptitude que. Few of the reasons are mentioned below: . You will have to respectively pass-through corresponding objects - that is, a VanillaDonut, and a GlazedDonut - to the two Pastry instances, and thereafter call the Pastry's name() method. With the above-mentioned defined,you will need to create a new trait named VehicleSystem that has a type parameter for allsub-types of Vehicle. Click me to see the sample solution, 11. RDD Transformations are lazy operations meaning none of the transformations get executed until you call an action on Spark RDD. Student(Joe,15) Sum of ages = 48, Problem 9:Write a Scala program and list all the odd numbers between 300 and 350. This partial function will not have any other matching clauses. Shopping Basket One = Cake - Milk - Cheese - Toilet Paper Go to the editor Do not submit any solution of the above exercises at here, if you want to contribute go to the appropriate exercise page. Instructions for sharing are on thescala-exercisessection. Click me to see the sample solution, 14. Use these new above-mentioned classes, and create two lazy objects, or instances,in a new trait named VehicleServices with a type parameter for all sub-types of Vehicle. Age: 38 You can use the test inputs for, say, "Bob","Joe", and "Jack", and make sure that the output is as shown below. Write a Scala program to exchange the first and last characters in a given string and return the new string. Update vehicle = Bike(honda bike firestorm) Lets create, The last step of our current project is write, Finally I would like finish to this discussion of scala and sparkk with the example to, We create a single file called Save2.scala, I would like to say that during the developing of our programs, it is recommendable assign the priority to transformations that cost less network cost as, And always try to keep in mind to distribute the computation charge around all possible. They assume you have an Apache Hadoop ecosystem setup and have some sample data files created. Output: Similar to SQL GROUP BY clause, Spark groupBy() function is used to collect the identical data into groups on DataFrame/Dataset and perform aggregate functions on the grouped data. ], Scala Programming Basic [ 26 Exercises with Solution ], Scala Programming String [ 46 Exercises with Solution ], Scala Programming Array [ 40 Exercises with Solution ], Scala Programming List [ 24 Exercises with Solution ], CoffeeScript Exercises, Practice, Solution, Twitter Bootstrap Exercises, Practice, Solution, C Programming Exercises, Practice, Solution, C# Sharp Programming Exercises, Practice, Solution, R Programming Exercises, Practice, Solution, SQL Exercises, Practice, Solution - JOINS, SQL Exercises, Practice, Solution - SUBQUERIES, JavaScript basic - Exercises, Practice, Solution, Java Array: Exercises, Practice, Solution, C Programming Exercises, Practice, Solution : Conditional Statement, HR Database - SORT FILTER: Exercises, Practice, Solution, C Programming Exercises, Practice, Solution : String, Python Data Types: Dictionary - Exercises, Practice, Solution, Python Programming Puzzles - Exercises, Practice, Solution, JavaScript conditional statements and loops - Exercises, Practice, Solution, C# Sharp Basic Algorithm: Exercises, Practice, Solution, Python Lambda - Exercises, Practice, Solution, Python Pandas DataFrame: Exercises, Practice, Solution. Output: The Vehicle type has two sub-classes, namely,a Car, and a Bike. The 8th character literal in http://allaboutscala.com 5 cupcakes at $4.99 each, Use an appropriate data structure to store the above-mentioned shopping cart items. Problem 16:Write a Scala program and use a case class to model a Lollipop type with a name propertyof type String. Similar to the previous partial function,it will not have any other matching clauses. vw passat stock = 100 Let's see some examples. For all other types, it should output: "Item [the item] should be removed from the basket.". Web programming/HTML Favorite snack is cupcake, name = James is 10 years old. Click me to see the sample solution, 15. Use the List data structure from Scala's collection type and store the above-mentionedvehicles. How to create a range of characters (Lists, Sequence) in Scala? Define another method named"formatNames" which also has an input String called "name". C You are free to use whichever data structure is appropriate to store the above-mentioned items. Using the combined single partial function, test the following name inputs to producethe resulting output as shown below. The smallest item in the Vector = -98 DOS Spark DataFrame or Dataset cache() method by default saves it to storage level MEMORY_AND_DISK because recomputing the in-memory columnar representation of the underlying table is expensive. Output: The second partial function will be called "nameIsJoe" and it will have a String input parameter,and will output true only for the String literal "Joe". These methods will, however, not provide any implementation details. Output: and finally, we will also see how to do group and aggregate on multiple columns. 10 useful Scala solved programs Making vehicle = honda bike firestorm and then you get you first run Hello world. Since RDDs are immutable, any transformations on it result in a new RDD leaving the current one unchanged. When we need to load our passwords or configuration parameters of our program in scala. Write a Scala program to create a new string which is n (non-negative integer ) copies of a given string. EEEEE - 5. Thereaftercreate two sub classes of the Student class, namely, a PrimaryStudent, and a SecondaryStudent. Favorite snack is nothing! This section contains the solutions to the Scala exercises, and problem sets from our scala-exercises section. CCC - 3 Problem 24: This Scala exercise is yet another example of Scala's built-in . BOB You can use the followingshopping cart item as an example: A packet of rice at $10.99 and quantity bought is 5.
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