Knowledge Factory

How to make the first letter of a string uppercase, but not change the case of any of the other letters? For Example: "go language is awesome" → "Go language is awesome" "hello world" → "Hello world" Solution 1: Easy package main import ( "unicode" ) // Main function func main() { str := "go language is awesome" runes := []rune(str) if len(runes) > 0 { runes[ 0 ] = unicode.ToUpper(runes[ 0 ]) } println(string(runes)) } Output: Solution 2: Easy package main import "strings" // Main function func main() { str := "go language is awesome" str = strings.ToUpper(string(str[ 0 ])) + str[ 1 :] println(str) } Output: Solution 3: Normal package main import ( "unicode" "unicode/utf8" ) // Main function func main() { str := "go language is awesome" println(firstToUpper(str)) } func firstToUpper(s string ) string {

Split a String import java.util.Arrays ; import java.util.stream.Collectors ; public class Main { public static void main ( String [] args) { String str = "I love my country" ; Arrays . stream ( str .split( " " )) .collect( Collectors . toList ()) .forEach( System . out ::println); } } Declare String which we are going to split. The stream here is created from an existing array using the Arrays.stream() method . All array elements are converted to stream elements. Here, split() method converts String based on whitespace and returns array of String. You need to pass a special object to the method collect(). This object reads all the data from the stream, converts it to a specific collection, and returns it.  toList() method Returns a Collector that accumulates the input elements into a new List. Finally, Iterate over List and print each elements to the console. Console Output:  I love my country More examples,

Example 1: Using Collections.frequency() To find frequency of a particular element we can use the frequency() method: import java.util.Arrays; import java.util.Collections; import java.util.List; import java.util.stream.Collectors; public class DriverClass { public static void main( String [] args) { List < String > obj = Arrays.asList( "ant" , "1" , "cat" , "ant" , "we" , "java" , "cat" ); obj.stream().filter(i -> Collections. frequency(obj, i) > 1 ).collect(Collectors.toSet()) .forEach(System.out :: println); } } Output: ant cat Example 2: Using Collectors.groupingBy() We can also use the Collectors.groupingBy() method to count the frequency of elements present in a stream.  import java.util.Arrays; import java.util.List; import java.util.Map; import java.util.Set; import java.util.function.Function; import java

Hello everyone, today we will learn how to develop a  web application that is a basic User Management Application using MongoDB , Vue.js , Python , and Flask . GitHub repository link is provided at the end of this tutorial. You can download the source code. More Related Topics, React.js + Python + MongoDB CRUD application Python + MongoDB + Vue.js CRUD Application  Angular10 + Python + MongoDB CRUD application Python-Create a CRUD Restful Service API using FLASK and MYSQL Python-Simple CRUD Web App with Python, Flask, and Mysql Python with MongoDB Atlas - CRUD After completing this tutorial what we will build? We will build a full-stack web application that is a basic User Management Application with CRUD features:       • Create User     • List User     • Update User     • Delete User User Interfaces -Retrieve all Users: -Add a User: -Update User: We divided this tutorial into two parts.  PART 1 - Rest APIs Development using Python and Flask PART 2 - UI development using Vue.js PART 1