How to Generate a SHA256 HMAC Hash from a String in Go
In Golang, using the crypto/hmac library is the easiest way to generate a SHA256 HMAC Hash from a string.
In cryptography, an HMAC (hash-based message authentication code) is a specific type of message authentication code (MAC) involving a cryptograp...
How to Get a SHA256 Hash from a String in Go
In Golang, using the Sum256 function is the easiest way to get a SHA256 hash from a string.Go implements several hash functions in various crypto/* packages.
Using Sum256 Function
The sha256.Sum256() function returns the SHA256 checksum of the data...
How to Get a MD5 Hash from a String in Go
In Golang, using the Sum function is the easiest way to get a MD5 hash from a string.
Using Sum Function
The md5.Sum() function returns the MD5 checksum of the data.
The following example should cover whatever you are trying to do:
package mai...
How to Get the Full URL in PHP
In PHP, using the $_SERVER variable is the easiest way to get the full URL.
Using $_SERVER Variable
$_SERVER is an array containing information such as headers, paths, and script locations.
The following example should cover whatever you are trying...
How to Iterate Over a String by Character in Rust
In Rust, there are 3 ways to iterate over a string by character.
Using chars Method
The chars() method returns an iterator over the chars of a string slice. See the following example:
fn main() {
let s = "abc";
for c in s.chars() {
pr...
How to Update a Value in a Mutable HashMap in Rust
In Rust, there are 3 ways to update a value in a mutable HashMap.
Using get_mut Method
The get_mut() method returns a mutable reference to the value corresponding to the key. See the following example:
use std::collections::HashMap;
fn main()...
How to Count the Occurrences of a List Item in Python
In Python, there are 3 ways to count the occurrences of a list item.
Using count Method
The str.count() method returns the number of non-overlapping occurrences of substring sub in the range [start, end]. Optional arguments start and end are interpr...
How to Remove Duplicates Strings from Slice in Go
In Golang, there are 2 ways to remove duplicates strings from slice.Using a Hash Map
We have defined a function where we are passing the slice values and using the map function we are checking the duplicates and removing them. The ones that are curr...
How to check if key exists in HashMap in Rust
In Rust, there are 2 ways to check if key exists in HashMap.
Using HashMap::contains_key Method
The contains_key method return true if the map contains a value for the specified key.
use std::collections::HashMap;
fn main() {
let mut map = Hash...
How to create a multiline string in Rust
In Rust, there are 4 ways to create multiple lines string.Using triple-quotes
A string literal is a sequence of any Unicode characters enclosed within two U+0022 (double-quote) characters, with the exception of U+0022 itself, which must be escaped b...
How to use hash function in Python
Secure hashes and message digests.Hash algorithms
The hashlib module implements a common interface to many different secure hash and message digest algorithms. Included are the FIPS secure hash algorithms SHA1, SHA224, SHA256, SHA384, and SHA512 (def...
Built-in Types in Python
Python’s Core Data Types.Core Data Types
The principal built-in types are numerics, sequences, mappings, classes, instances and exceptions.
Built-in objects preview:
Object type:
Numbersint, float, complex.Strings'spam', "Bob's", b'a\x01c', u'sp\xc4m...
How to use of hash functions in PHP
How Hashing Function Works and its Syntax.
MD5 Function
The md5() calculates the md5 hash of a string. Returns the hash as a 32-character hexadecimal number.
$str = "Google";
// 8b36e9207c24c76e6719268e49201d94
echo md5($str);
// bool(true)
md...
How to handle If-modified-since header in PHP
Reduce Bandwidth Usage by Supporting If-Modified-Since in PHP.
If-Modified-Since
The If-Modified-Since request HTTP header makes the request conditional: the server sends back the requested resource, with a 200 status, only if it has been last modif...
How to use the curl command in Linux
command line tool and library for transferring data with URLs.
cURL (pronounced 'curl') is a computer software project providing a library (libcurl) and command-line tool (curl) for transferring data using various network protocols. The name ...