Tanmay451

/*
The provided Go code demonstrates the use of a decorator pattern to implement authorization checks for HTTP endpoints. The main components of the code include:

isAuthorized Function:
It takes an HTTP handler function (endpoint) as a parameter and returns an http.Handler.
The returned http.Handler is a function that checks for the presence of an "Authorized" header in the incoming HTTP request.
If the header is present and set to "true," the original endpoint function is called, allowing the request to proceed.
If the header is not present or set to a value other than "true," a "Not Authorized" message is sent as the response.
homePage Function:
This is a sample HTTP handler function representing the home page.

Tanmay451

# https://www.iana.org/domains/root/servers
# https://blog.bytebytego.com/p/why-the-internet-is-both-robust-and

# Query sent to a root nameserver (198.41.0.4).
# Root server doesn't have the answer for "google.com", but provides a referral to the .com TLD nameservers.
# Response includes a list of .com TLD nameservers (e.g., e.gtld-servers.net, b.gtld-servers.net).
➜  ~ dig @198.41.0.4 google.com

; <<>> DiG 9.10.6 <<>> @198.41.0.4 google.com
; (1 server found)

Tanmay451

// In the PrintSlice function, T is a type parameter, and any is a type constraint.
// The any constraint is built into the language and allows any type to be used.
// The function can be called with any slice type, such as []int or []string.

package main

import "fmt"

// PrintSlice prints each element of a slice of any type.
func PrintSlice[T any](s []T) {

Tanmay451

package main

import (
    "fmt"
    "io"
    "log"
    "net/http"
    "net/url"
    "time"

Tanmay451

// https://gist.github.com/hongster/04660a20f2498fb7b680
// https://github.com/arpitbbhayani/tcpserver/blob/master/main.go

package main

import (
    "fmt"
    "log"
    "net"
    "time"

Tanmay451

package main

import (
	"fmt"
)

// Define some basic arithmetic operations as first-class functions.
// These functions can be assigned to variables, passed as arguments, and returned from other functions.
var sum = func(a, b int) int { return a + b }
var minus = func(a, b int) int { return a - b }

Tanmay451

package main

import (
	"fmt"
)

// testFunction returns a closure. A closure is a function that captures variables from its surrounding scope.
// In this case, 'y' is captured and maintained between function calls.
func testFunction() func(int) int {
	var y int // 'y' is initialized in the enclosing function's scope.

Tanmay451

YouTube