How to Count the Items in the Map in Go
In Golang, using the len function is the easiest way to count the items in the map structure.
Using len Function
The built-in function len take arguments of various types and return a result of type int. The implementation guarantees that the result...
How to Prettyprint a JSON File in Python
In Python, there are 2 ways to prettyprint a JSON file.
Using json module
The json module already implements some basic pretty printing in the dump and dumps functions, with the indent parameter that specifies how many spaces to indent by:
#!/us...
How to Access Command Line Parameters in Rust
In Rust, there are 2 ways to access command line parameters.
Using std::env::args Function
This function actually returns the arguments that this program was started with. See the following example:
use std::env;
fn main() {
for arg in env::...
How to Get the Directory of the Currently Running File in Go
In Golang, there are 3 ways to get the directory of the currently running file.Using os.Executable Function
Executable returns the path name for the executable that started the current process.
The easiest way to get the directory of the currently ...
How to print a formatted string in Rust
Rust String Formatting and Printing Best Practices.Using println!
Prints to the standard output, with a newline. Use the format! syntax to write data to the standard output. See std::fmt for more information.
fn main() {
let name = "Bob";
pri...
How to format a date or time in Go
In Golang, there are two ways to format the time.The layout string
Go doesn’t use yyyy-mm-dd layout to format a time. Instead, you format a special layout parameter.
2006-01-02 15:04:05.999999999 -0700 MST
package main
import (
"fmt"
"tim...
How to reverse a slice in Go
Reverse a Slice in Golang.Using a for Loop
The standard library does not have a built-in function for reversing a slice. Use a for loop to reverse a slice:
package main
import "fmt"
func main() {
s := []string{"b", "c", "d"}
for i := len(s)/...
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...
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 ...