Trending February 2024 # How Sorting Works In Golang With Its Methods In Go # Suggested March 2024 # Top 4 Popular

You are reading the article How Sorting Works In Golang With Its Methods In Go updated in February 2024 on the website Cancandonuts.com. We hope that the information we have shared is helpful to you. If you find the content interesting and meaningful, please share it with your friends and continue to follow and support us for the latest updates. Suggested March 2024 How Sorting Works In Golang With Its Methods In Go

Introduction to Golang Sort

In Go, language sorting allow us to sort numeric or string array in the format we want, for example, if we have a list of students with marks of the students and we want to sort the student list according to the roll number or according to the marks of the students then we can use the sort, sort contains various methods like methods to check if the given array of the students is sorted or not by returning the true and false value, the biggest benefit of the sort in the go language it can sort upto each letter of the string with writing the minimum code.

Start Your Free Software Development Course

Web development, programming languages, Software testing & others

Syntax sort.sort_function_name(array_of_list)

In the above, we have written a simple syntax for the go sort; we can explain each attribute of the below syntax,

sort: The sort is a package in go language that we need to import into our program to use the available features of the sorting.

sort_function_name: These attributes are the functions of the sort package of the go language; for example, if it has a function to check if the array is sorted or not, we have the function sort array according to alphabet cases.

array_of_lis: This is the list of the array on which we are going to perform our operation; for example, if we want to sort string, then we can use the array of the string students, and after sorting, the output with the sorted array will be there.

How does Sorting work in the Go language?

Before understanding the working of the sort in go language, let us understand the uses, suppose we have a huge list of the array or slice and data containing the information of the students with marks and registration numbers of the students and we won’t get the new array or slice in the sorted form either it can be sorted by marks or registration number for easy visibility of the data ..Working of the sorting in the go language is very simple we can explain in some important points,

First of all, before using the features of the sort in the go language, we need to import the main package of the sort.

On the sort, we can call the functions available in the go language, and these functions will get the array or slice.

Sorting operations can also perform on a slice other than an array with the help of the method slice.

Once we use the sort, it will expect its function for performing its task on the array or slice. We will discuss more in the example.

Sorting Methods in Go

Below are the methods of sorting in Go Language:

1. String

This method we used to sort the string containing arrays.

Example,

Let us discuss a little about the below example,

Here we have taken two arrays, and they are not sorted initially.

First, we printed the unsorted array.

Then we sorted them as the array contains the string name, so we used the method String on sort.

Please see the below example, along with the screen of the output.

Code:

package main import ( "fmt" "sort" ) func main() { Human := []string{"Ranjan", "Ajay", "Vijay", "Sujit", "Vikash", "Akash"} Animals := []string{"Cow", "Lion", "Tiger", "Cat", "Rabbit", "Panda"} fmt.Println("Printing the value of the human and animal list") fmt.Println("Human list before: ", Human) fmt.Println("Animal list before: ", Animals) sort.Strings(Human) sort.Strings(Animals) fmt.Println("Printing the Human and animals after sorting:") fmt.Println("Human list After: ", Human) fmt.Println("Animal list before: ", Animals) }

Output:

2. StringArraySorted

This method is used to check if the given array is sorted or not, it will take an array of the data and return the output as true and false.

Example,

Let me give a little brief about the below,

In the below example, we have taken two arrays, one of human and another with the animal array.

First, we printed then, and then we used the methodStringArraySorted; it returns the output in the form of boolean values like true and false on the basis of if the array is sorted or not.

Please see the below example, along with the screen of the output.

Code:

package main import ( "fmt" "sort" ) func main() { Human := []string{"Ranjan", "Ajay", "Vijay", "Sujit", "Vikash", "Akash"} Animals := []string{"Cow", "Lion", "Tiger", "Cat", "Rabbit", "Panda"} fmt.Println("Printing the value of the human and animal list") fmt.Println("Human list before: ", Human) fmt.Println("Animal list before: ", Animals) check1 := sort.StringsAreSorted(Human) check2 := sort.StringsAreSorted(Animals) fmt.Println("Printing the Human and animals after sorting:") fmt.Println("Checking if sorted: ", check1) fmt.Println("Checking if sorted", check2) }

Output:

3. Slice

Example,

We have created a slice of students with the student name, marks, and id of the students.

In the example, we are sorting the slice on the basis of the name (string), marks, and id of the students and printing the output of their sorting.

Please see the below example, along with the screen of the output.

Code:

package main import ( "fmt" "sort" ) func main() { Student := []struct { s_name string s_marks int s_id     int }{ {"Ranjan", 280, 1098}, {"Ajay", 280, 300}, {"Anita", 330, 109}, {"Kavita", 100, 107}, {"Ashima", 444, 258}, {"Rohit", 450, 188}, {"Vijay", 289, 118}, {"Dhanush", 239, 329}, {"Priya", 400, 123}, {"Nikita", 312, 111}, } sort.Slice(Student, func(i, j int) bool { return Student[i].s_name < Student[j].s_name }) fmt.Println("Print the out of sorted student according to name:") fmt.Println(Student) sort.Slice(Student, func(i, j int) bool { return Student[i].s_marks < Student[j].s_marks }) fmt.Println() fmt.Println("Print the out of sorted student according to marks:") fmt.Println(Student) sort.Slice(Student, func(i, j int) bool { return Student[i].s_id < Student[j].s_id }) fmt.Println() fmt.Println("Print Students after sorting by their id:") fmt.Println(Student) }

Output:

Conclusion – Golang Sort

From this tutorial, we learned about the basics of sort and its working in the go language; we also looked upon the syntax of the sort in the go language. We focus on some of the important examples and the function of the sort in the go language.

Recommended Articles

This is a guide to Golang Sort. Here we discuss an introduction to Golang Sort, syntax, and three different methods with examples to implement. You can also go through our other related articles to learn more –

You're reading How Sorting Works In Golang With Its Methods In Go

How Println Works In Kotlin With Examples?

Introduction to Kotlin println

Web development, programming languages, Software testing & others

Syntax

The kotlin language uses many default keywords, variables, and functions to implement the mobile-based applications, with some pre-defined keywords, including the functions. Like that, println() is the default function for handling and print the statements, which the coder declares.

{ val variablename= values println(“coder statements and ${variablename}””) var var2= values println(“coder statements and $var2”) }

The above codes are the basic syntax for utilising the println() method and its statements used by the kotlin language. Then, based on the user scenario, we can print the outputs on the console screen.

How does println work in Kotlin?

Using the println() method, the coder prints the statements and the outputs the programmer enters, and it depends on the application point of view. The programmer entered all the codes like keywords, variables, functions, and classes that have both primary and secondary classes. Some nested classes concept implements the parent class with the child class, and then it’s called by the specific packages. For each method, both default and customized methods used the println() statements.

The println() method has similar to the print() method but some difference is there like print() method prints the string inside of the quotes and println() method print the strings inside the quotes which is similar like print() method but the mouse cursor which automatically moves to the next line of the console screen. We can use the expressions and catch the exceptions and errors instance whenever it requires like the try-catch statement is used for handling the exceptions block, but the catch and finally blocks to capture and print the exceptions using the print and println() method. And also, when we want to print the variable inside the println() method, we can use the dollar($) symbol followed by either var and val names along with inside of the double-quoted string literals.

Examples of Kotlin println

Given below are the examples of Kotlin println:

Example #1

Code:

import java.util.Scanner class examp1{ fun demo() { val strinp="Welcome To My Domain its the first example that related to the kotlin println() statement" mlist.add("Please add the first input") mlist.add("Please add the second input") mlist.add("Please add the third input") mlist.add("Please add the fourth input") mlist.add("Please add the fifth input") println("Please follow the below loop iteration") for(vlist in mlist){ println(vlist) } println("Thank you users your mutablelist datas are entered successfully") println(mlist[1]) mlist.add(1,"June") println("We can modify the first mutable list value as mlist.add(1,"June")") for(vlist in mlist){ println(vlist) } mlist.add("July") println("Again we can add one more list values mlist.add("July")") for(vlist in mlist){ println(vlist) } mlist.addAll(2,finp1) println("We can add all the list values into the single list: mlist.addAll(1,finp1)") for(vlist in mlist){ println(vlist) } mlist.addAll(finp) println("We can add all the values and make it to the single list: mlist.addAll(finp)") for(vlist in mlist){ println(vlist) } mlist.remove("July") println("We can remove the specified values: mlist.remove("July")") for(vlist in mlist){ println(vlist) } } } val num = 41.83 println("Your input num is:") println("$num") println("num = $num") println("${num + num}") println(41.83) val sc = Scanner(System.`in`) print("Please enter your input number: ") var il:Int = sc.nextInt() println("You entered input is: $il") var ob=examp1() ob.demo() }

Output:

Example #2

Code:

import java.util.Date import java.text.SimpleDateFormat class Exam2() { var id: Int = 0 var sname: String = "" var city: String = "" fun demo2(){ val sinp="41,Sivaraman, Chennai" println(sinp) } } enum class Second(var sec: String) { demo("Welcome To My Domain its the second example that related to the kotlin println()"){ override fun sample() { println("Thank you users have a nice day") } }, demo1("We can override the sample method"){ override fun sample() { println("Current month is june") } }, demo2("Again we override the sample method"){ override fun sample() { println("Next month is july") } }; abstract fun sample() fun demo1(svalues: String): String{ return "Have a Nice day users" } } val inp1 = Exam2() var sinp=inp1.demo2() println(SimpleDateFormat("yyyy-MM-ddX").parse("2024-06-22+00")) println("Welcome To My Domain its the second example that related to the kotlin println() method, $sinp") println("Hello users") println(41) println(1234567L) println(0b01001111) println(41.32) println(41.762F) println('a') println(true) println() var st = "Hello users thank you for spenting ur time with us" println(st) println(st) }

Output:

In the second example, we used the date format package utilised in the kotlin codes with some operations like integer, string, float, double and boolean datatype values printed on the output console.

Example #3 import java.util.Scanner try { val inpread = Scanner(System.`in`) println("Welcome To My Domain its the third example that related to the kotlin println()") println("Please enter your inputs") var id = inpread.nextInt() println("Your input id is "+id) demo(41,83,lamb) val inpdata = 12 / 4 println(inpdata) } catch (e: NullPointerException) { println(e) } finally { println("finally block always executed whenever try is executing") } println("Have in Nice Day users please try again") } val result = in1 + in2 println(result) }

Output:

In the final example, we used the try-catch block for handling the exceptions and performed the arithmetic operations using the lambda expressions.

Conclusion

In kotlin language, we used many default methods, classes, and keywords to implement the application. So all the programming logic will be implemented using some codes like classes and methods eventhough some additional operations are performed, results are printed on the output console by using the print() and println() methods.

Recommended Articles

This is a guide to Kotlin println. Here we discuss the introduction, syntax, and working of println in Kotlin along with different examples and code implementation. You may also have a look at the following articles to learn more –

How Function Works In Scala With Examples

Definition of Scala Function

As the name suggests, Scala Function means a piece of code supposed to do a function. Like any other programming language scala, Function works in the same way. The function is nothing but a way to writing our logic in a separate part, or we can say a function is a group of statements that are responsible for performing some specific task. The function can be used where we have the same logic or repetitive code, so instead of writing the code again and again, we can create one function and call that from everywhere. Scala function is also responsible for performing a specific task.

Start Your Free Software Development Course

Web development, programming languages, Software testing & others

How to Define Functions in Scala? defname_of_function ([parametre_list]) : [return_type] = { }

Scala Function contained 6 parts while defining; let’s discuss them one by one.

def: It is a keyword that is available in scala. If you want to define any function, we have to use this keyword at the beginning.

name_of_function: This is the user-defined name of the function. It should be similar to the logic or task that the function is going to execute while calling. Also, it should be in a camel-case (lower).

return_type: return type means what we are expecting from the function in return after executing. It can be anything, but it is optional. In java, the default return type is void, and in scale, it is Unit if we do not specify.

parametre_list: This stands for what we are providing to our function while calling. We have to specify the data type of the parameters as well while declaring inside the square brackets []. We will see them into the practice syntax below.

 =: This can be used with the return type component. It specifies, if the = is there, it means our function is going to return some value. If not, then no value we want. It is like a default return type function.

function logic: Inside this, we write the whole logic that we want to perform on the calling of function. We can also call the different functions inside this function. Remember body should be enclosed with the {} curly braces.

defcalculateSum ([a:Int, b: Int]) : Int = { return a + b; }

This way, we can define it.

How does Function work in Scala?

The function is used to perform the task. To use any function, we need to call it. Scala provides us with different ways to call a function, i.e. we can call them directly or by using the class instance.

[instance].name_of_function

or

function(list_parameter)

In scala, we have two types of functions like any other programming language.

Parameterized functions: In this type of function, we pass the list of parameters.

Non-Parameterized functions: In this type of function, we do not pass any parameters to function. That will be empty. Also, we can pass any user-defined value as a parameter also.

Let’s take one example to understand its working;

object Main extends App{ calculateSum(10, 20) defcalculateSum(a : Int, b : Int){ var result = a + b ; println("Result is  :: "+ result) } }

Above we have defined one function name calculateSum, and it is taking two variables, a and b. Both are of the Integer type. Inside the function body, we have written the logic that we want to perform. We are adding these two values, a and b, holding the value into the third variable named result. After that, we are just printing the value that we obtained. But now we have to call this function, so in the above line, we are calling the function b its name and parameter specified. The number of Parameters we passed and the number defined in the function signature should be the same; otherwise, it will give a compile-time error.

Examples of Scala Function

Examples of (simple function, parameterized function, etc.).

Example #1

This example shows the use of functions without parameters.

object Main extends App{ simpleFunction() defsimpleFunction(){ println("This is simple function") println( "without parameter. ") } }

Output:

Example #2

Code:

object Main extends App{ sum(20 , 50, 100) defsum(x: Int, y : Int, z: Int){ println("This is parameter function") var result = x + y +z println("result obtained is  :::"  +result) } }

Output:

Example #3

In this example, we are making a mixed parameter list of a function. This takes integer and string as well.

Code:

object Main extends App{ mixedFunction(20 , 50, 100, "Ajay", "Indore") defmixedFunction(x: Int, y : Int, z: Int, name: String, address: String){ println("This is parameter function") var result = x + y +z println("result obtained is  :::"  +result) println("Employee name  :: " + name) println("Employee address  :: " + address) } }

Example #4

In this example, we are taking a user-defined object and printing its value. We can take any value as a parameter.

Code:

object Main extends App{ var emp1 = new Employee("Amita", 20, 30, "Indore") employeeInfo(emp1) defemployeeInfo(emp : Employee){ println("In this we are taking one user defined parameter.") println("Passing a user value ::") } } class Employee(name: String, Id:Int, Age: Int, address: String){ }

Output:

Conclusion

Functions are used to avoid the redundant code or repetitive code. It makes our code looks simple and more understandable. Also, we can easily debug our code and identified the error, if any. These Scala functions are the same as any other programming language. Keep in mind the return type and parameter list or signature of the function while working with them.

Recommended Articles

We hope that this EDUCBA information on “Scala Function” was beneficial to you. You can view EDUCBA’s recommended articles for more information.

How Union Works In Linq With Examples?

Introduction to LINQ Union

Web development, programming languages, Software testing & others

Syntax:

Let’s see the LINQ Union method syntax as follows,

If you are working with complex types of union collection, then you must make use of the IEqualityComparer interface to get an accurate result; otherwise, you will get only the incorrect result.

How does Union work in LINQ?

In LINQ Union method it only supports the method syntax; the query syntax will not be available in the union method. The Queryable and Enumerable classes will be acceptable in the union method. The Union operator or method is mainly used to combine the multiple collections into a single distinct collection; it returns only the unique elements; as a result, it removes the duplicate values from the collection. Let’s see one example as follows.

For Example,

Collection X= {20, 40, 60, 80, 100} Collection Y= {20, 40, 70} var _result = X.Union(Y);

The result is = {20, 40, 60, 70, 80, 100} in this resultant collection, the elements 20 and 40 appear in both the collection, so in the result, it returns only once because unique elements are only displayed it eliminates the duplications. Let’s see the working flow of the unique method as follows,

static public void Main() { string[] Department1 = { "JAVA", "DOTNET", "PHYTHON", "ANDROID" }; string[]Department2 = { "JAVA", "ANDROID", "DESIGNING" }; var unionResult = Department1.Union(Department2); foreach (var items in unionResult) { Console.WriteLine(items); } } string[]Department1 = { "JAVA", "DOTNET", "PHYTHON", "ANDROID" }; string[]Department2 = { "JAVA", "ANDROID", "DESIGNING" };

From this, we have to return only the unique elements from both the collections it removes the duplications from both collections, to get all the elements uniquely, we need to go with the Union () method,

var unionResult = Department1.Union(Department2);

It returns only the unique elements from the collection, in which it removes the repeated elements present in the collection it returns only once; let’s check the result here below,

Result is {"JAVA", "DOTNET","DESIGNING", "PHYTHON", "ANDROID"}; Usage of IEqualityComparer Interface

Here we introduce the IEqualityComparer Interface for the union method because the union method can’t be able to differentiate whether the two types are equal; it does not work with complex types of collection, so it returns the only incorrect result. For this purpose, we have to build a new comparer class to implement IEqualityComparer Interface to get an accurate result. IEqualityComparer Interface has two different methods, GetHashCode and Equals methods; we need to implement both methods compulsory. Let’s see one example for IEqualityComparer interface and lets us assume the Book Class contains BookID and BookName,

{ public bool Equals(Book x, Book y) { if (x.BookID == y.BookID && x.BookName.ToLower() == y. BookName.ToLower()) return true; return false; } public int GetHashCode(Student obj) { return obj. BookID.GetHashCode(); } }

Now can send the BookComparer class in the Union extension method to get the accurate results.

BookList _1.Add(new BookClass { BookID = 1001, BookName = “The Writer” }); BookList _1.Add(new BookClass { BookID = 1002, BookName = ” Success ” }); BookList _1.Add(new BookClass { BookID = 1003, BookName = “Life Secret ” }); BookList _2.Add(new BookClass { BookID = 1002, BookName = “Success” }); BookList _3.Add(new BookClass { BookID = 1005, BookName = “Team Lead ” }); var _resultUnion = BookList _1.Union(BookList _2, new BookComparer()); foreach (BookClass res in _resultUnion) Console.WriteLine(res. BookName);

The result will be” The Writer, Success, Life Secret, Team Lead,” it returns only the unique elements from the collection, in which it removes the repeated elements.

Example

Code:

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace Console_LINQUnion { class Linq_Union { internal class DoctorClass { public int DoctorID { get; set; } public string DoctorName { get; set; } } { public bool Equals(DoctorClass a, DoctorClass b) { if(a.DoctorID==b.DoctorID&&b.DoctorName.ToLower()==b.DoctorName.ToLower()) { return true; } return false; } public int GetHashCode(DoctorClass obj) { return obj.DoctorID.GetHashCode(); } } public class Program { public static void Main(string[] args) { DoctorList_1.Add(new DoctorClass { DoctorID = 1001, DoctorName = "Smith" }); DoctorList_1.Add(new DoctorClass { DoctorID = 1002, DoctorName = "Rio" }); DoctorList_1.Add(new DoctorClass { DoctorID = 1003, DoctorName = "Dev" }); DoctorList_1.Add(new DoctorClass { DoctorID = 1004, DoctorName = "Jack" }); DoctorList_1.Add(new DoctorClass { DoctorID = 1005, DoctorName = "Ricky" }); DoctorList_2.Add(new DoctorClass { DoctorID = 1002, DoctorName = "Rio" }); DoctorList_2.Add(new DoctorClass { DoctorID = 1003, DoctorName = "Dev" }); DoctorList_2.Add(new DoctorClass { DoctorID = 1007, DoctorName = "Peter" }); DoctorList_2.Add(new DoctorClass { DoctorID = 1009, DoctorName = "Raj" }); DoctorList_2.Add(new DoctorClass { DoctorID = 1001, DoctorName = "Smith" }); var _resultUnion = DoctorList_1.Union(DoctorList_2, new DoctorComparer()); Console.WriteLine("USING LINQ-UNION WITH IEqualityComparer"); Console.WriteLine("List of Unique Doctor-Namesn"); foreach (DoctorClass val in _resultUnion) Console.WriteLine(val.DoctorName); Console.ReadLine(); } } } }

Output:

Conclusion

The article LINQ Union essentially used to combine the collection of elements and returns distinct elements; as a result, when working on complex types of huge data, we need to implement the IEqualityComparer Interface. I hope the article helps out without any doubt by seeing the examples programmatically.

Recommended Articles

This is a guide to LINQ Union. Here we discuss the Introduction, syntax, How Union works in LINQ along with Examples and code implementation. You may also have a look at the following articles to learn more –

How Boolean Type Works In Perl With Examples

Introduction to Perl boolean

Perl boolean type is a type of value that, unlike other programming languages, behaves differently in a manner where the function using these values returns true or false. Perl programming language is not considered conventional when it comes for making the value as true or false. These values are used only for interpretation and significance that these are boolean values, not the actual values for manipulation. A boolean value is not majorly used in Perl language; rather, it is used only when the typical systems have made use of these as return types for identification and manipulation.

Start Your Free Software Development Course

Web development, programming languages, Software testing & others

Syntax:

use boolean; do &always if true_val; do &never if false_val;

The module as boolean makes use of basic as data type which is used for making the entire system comprising f values which is true or false depending on the value.

How boolean Type Works in Perl?

There are many ways to represent the boolean values in Perl for which the programmer depends or work for with the help of making the process of evaluating the conditional checking, system checking and many other factors which depends on the boolean type of Perl. These values are not any kind of special values that need to have value as true or false. On the other hand, there are a number of ways in which the value is being taken care of in terms of boolean.

There are some values that are always false in the Perl programming language, namely, ‘undef’, 0, 0.0, ‘’, ‘0’.

Boolean for Perl programming language uses other scalar values but not the naïve values like other programming languages.

Boolean in Perl can be of many types, like if in case the value comes out to be truth, then it needs conversion into the value as false depending on the type of requirement at the time of implementation.

Most often, the values come out to be false, but within that value of return, there might be some inbuild system variables which internally gets a comparison with the values and returns the value as true within it, which is mentioned in an example further.

There are times when boolean is used for undef and empty string; then, in that case, it is very much needed to make the entire set of boolean justifiable with the other values that need conversion and worthy for representation.

Using Strict and warnings for the values and the programs in execution is quite useful whenever needed to get the troubleshooting done correctly.

Strict and warning usage with the empty string in consideration sometimes provides the warning for any Perl program into execution. Also, it helps in making the overall result to be moved in some streamlined way.

There are some values as 0, which is true in some or the other way where the boolean values are text in the form of string and then when it is used, it gets converted into some type of number converted into some value with string.

There are some of the values which are considered as truth with respect to the usage of the unary operator and can be converted into a lie when used with a single operator; other than that, when double unary operator !! is used, it will be used for converting the entire value as a lie.

Examples of Perl boolean

Given below are the examples of Perl boolean:

Example #1

This program demonstrates the use of Perl statement, which is used as a conditional statement to check whether the value taken is true or false depending on the scenario and requirement.

Code:

#!/usr/bin/perl if ('even_no') { print 'true'; } else { print 'false'; }

Output:

Example #2

This program demonstrates the false values for the variable being assigned a value as 0, as shown in the output.

Code:

#!/usr/bin/perl $at_1 = 0; if ($at_1) { print "at_1 is Truen"; } else { print "at_1 is Falsen"; }

Output:

Example #3

This program demonstrates the use of undef with the condition in Perl, which is used for giving the output as shown.

Code:

#!/usr/bin/perl foreach my $vl_3 (undef, 0, 0.5, '', '8') { if ($vl_3) { print "truen"; } else { print "falsen"; } }

Example #4

This program demonstrates the empty string, which is used for checking the condition with the value to be returned as true or false as shown in the output.

Code:

#!/usr/bin/perl $bt_emp = ''; if ($bt_emp) { print "bt_emp is Truen"; } else { print "bt_emp is Falsen"; }

Output:

Example #5

This program is used for demonstrating the values by using warnings or strict as a standard file inclusion for a variable as shown in the output.

Code:

#!/usr/bin/perl use warnings; use strict; my $one_vr = undef; print $one_vr + 2;

Output:

Example #6

There are times when the value as string internally gets converted into the value as 0 and then when compared with the conditional check by evaluation is considered as shown in the output where the string is fed as an input to the value, and then it throws the value as true as shown.

Code:

#!/usr/bin/perl if ('0FR1RG') { print 'true'; } else { print 'false'; }

Output:

Example #7

This program demonstrates the use of unary operator ! which is used for making the value as truth from lie with the canonical format that is often used for manipulation.

Code:

#!/usr/bin/perl use Data::Dumper; print Dumper !!'Welcome_Everyone!';

Output:

Conclusion

Perl boolean is a type of boolean value used for making the Perl language use and identifies the return type by other methods and functions as true or false. Overall, Perl boolean, although not used so much significantly but once used, can solve many problems related to conditional check and evaluation, which programmers most often use.

Recommended Articles

This is a guide to Perl boolean. Here we discuss the introduction, how boolean type works in Perl? Along with examples, respectively. You may also have a look at the following articles to learn more –

How Schema Works In Mongodb?

Definition of MongoDB schema

MongoDB schema basically used in command-line tool or we can use it programmatically in our application at a module level. As we already know MongoDB is schema-less, at the time of creating any objects we cannot create any schema in MongoDB. We can enforce the schema for collection in MongoDB by using the MongoDB atlas cluster, for enforcing the document schema we need first to connect the database and collection. We can also create schema structure of collection by using create collection command, also we can check the index and collection field in MongoDB.

Start Your Free Data Science Course

Hadoop, Data Science, Statistics & others

Syntax:

Below is the syntax of the MongoDB schema.

1) To show the schema of index collection –

2) To show the schema of collections –

for (var key (Used to show key fields) in schematodo (Used to display schema field of collections)) { print (key, typeof key) ; }

3) Schema structure of document –

}

Parameter Description:

1) Name of collection – This is defined as the name of collection from which we have checked the schema structure of collection and indexes. We can check the schema structure of any collection in MongoDB.

2) getIndices – This is the method in MongoDB used to display schema structure of all indexes from specified schema which was we have used in our command.

3) findOne – This method is used to find single documents from collections. Using this method we also find all collection fields in MongoDB.

4) schematodo – This is used to display the schema structure of database collection in MongoDB. Using schematodo we can display all fields from collections.

5) Key – This parameter is defined as print the field from the specified collection which was we have used in our query.

6) Type of key – This parameter is defined as a type of key which was we have used in the query to display the schema structure.

7) Properties – This parameter is defined as the property of the document field which was we have used in our query.

8) Field name – This is defined as the name of the field which was we have used in our query. Using field name we can retrieve the document structure.

9) BSON type – This is defined as the document type which was we have used in the collection.

How schema works in MongoDB?

MongoDB is schema-less structure but we can enforce the collection by defining the document schema.

Schema is nothing but regular documents which was adhered to like the same specification of JSON schema.

We can also validate the schema in the MongoDB server. We can also use the type key to control the collection field value.

In MongoDB, document schema will represent any of the BSON type operators. We can define the schema structure of the following types.

10) UUID

To display the schema of indexes in MongoDB we need to first connect to the specific database. The below example shows that we need to connect the database to display the structure of indexes.

Code:

db.MongoDB_Update.getIndices ()

Figure – We need to connect the database to display the structure of indexes

In the above example when the first time execution of the query we have not connected to the database, so it will not show the result of the query. But after connecting to the specified database we can see the schema of indexes in MongoDB.

Binary encoded superset will support the additional data types in MongoDB.

We can enforce the document schema using MongoDB atlas. To create the enforcing schema first we need to connect the database and collections.

We don’t create a collection with schema in MongoDB, we can create an empty collection in MongoDB.

At the time of inserting documents, MongoDB automatically creates the schema for the collection.

We can say that MongoDB is schema-less database but we can implement our own class in our program to restrict the collection before inserting any data into the collection.

Example

Below example shows that enforce collection document schema using MongoDB atlas. We have used the below steps to enforce document schema.

1) Create a new application or open the existing application

Figure – Example to create new application to enforcing schema.

2) Add the collection and database

Figure – Example to add collection and database.

We have added the sample_training database and grades table to the application.

Figure – Check collection and database added to the application.

3) Generate schema

Figure – Generate schema.

4) Run the validation on generated schema

In the below example we have to check our validation on grades collection is working or not.

Figure – Example to run validation on schema.

5) Display the index schema details

In the below example, we have displayed the schema structure of indexes. We have displayed all the indexes structures from MongoDB_Update collections.

Code:

db.MongoDB_Update.getIndices ()

Figure – Example to display index schema structure details.

6) Display the schema fields from collections

In the below example, we have a display the schema of the collection. We can see that all the fields from MongoDB_Update fields will be displayed.

Code:

for (var key in schematodo) { print (key, typeof key) ; }

Figure – Example to Display the schema fields from collections.

Conclusion

Basically, MongoDB is schema-less database, we cannot create schema in MongoDB, but we enforce the collection documents in application code or using MongoDB atlas GUI tool. For generating schema first we need to connect to the specified database and collections in MongoDB.

Recommended Articles

This is a guide to Mongodb schema. Here we discuss the definition, How schema works in Mongodb? along with examples respectively. You may also have a look at the following articles to learn more –

Update the detailed information about How Sorting Works In Golang With Its Methods In Go on the Cancandonuts.com website. We hope the article's content will meet your needs, and we will regularly update the information to provide you with the fastest and most accurate information. Have a great day!