How to Use bytes.Buffer in Golang
Golang bytes.Buffer Examples
Examples of Golang bytes.Buffer
The bytes package provides the Buffer type for efficient manipulation of byte slices. A Buffer starts out empty but grows as data of types like string, byte, and []byte are written to it.
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How to Clear a bytes.Buffer in Go
In Golang, using the buffer.Reset function is the easiest way to clear a bytes.Buffer
Using buffer.Reset Function
The buffer.Reset() function resets the buffer to be empty, but it retains the underlying storage for use by future writes. Reset is the...
How to Pipe Several Commands in Go
In Golang, there are 2 ways to pipe several commands.
Using piped commands
For example, this function retrieves the CPU model name using piped commands:
package main
import (
"fmt"
"os/exec"
)
func main() {
cmd := "cat /proc/cpuinfo | eg...
How to Execute a Shell Command in Go
In Golang, using the exec.Command() function is the easiest way to execute a shell command
Using exec.Command Function
Command returns the Cmd struct to execute the named program with the given arguments.
You can execute a shell command using the e...
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 Check If an Object Is of a Given Type in Python
In Python, there are 2 ways to check if an object is of a given type.
Using isinstance Method
The isinstance(object, classinfo) method returns True if the object argument is an instance of the classinfo argument, or of a (direct, indirect, or virtua...
How to Read a Whole File into a String Variable in Go
In Golang, there are 3 ways to read a whole file into a string variable.
Using ioutil.ReadFile Function
ReadFile reads the file named by filename and returns the contents. A successful call returns err == nil, not err == EOF. Because ReadFile reads...
How to Pretty-Print Json in Go
In Golang, there are 2 ways to pretty-print json.
Using json.MarshalIndent Function
MarshalIndent is like Marshal but applies Indent to format the output. Each JSON element in the output will begin on a new line beginning with prefix followed by one...
How to Read a File Line-by-Line in Go
In Golang, there are 2 ways to read a file line-by-line.
Using bufio.Scanner Function
Scanner provides a convenient interface for reading data such as a file of newline-delimited lines of text. The ones that are currently implemented are:
packa...
How to use the grep command in Linux
Search for PATTERN in each FILE or standard input.
grep is a command-line utility for searching plain-text data sets for lines that match a regular expression. Its name comes from the ed command g/re/p (globally search for a regular expression and p...
How to use the free command in Linux
Display amount of free and used memory in the system.
free displays the total amount of free and used physical and swap memory in the system, as well as the buffers and caches used by the kernel. The information is gathered by parsing /proc/meminfo....
How to use the find command in Linux
search for files and directories based on their permissions, type, date, ownership, size, and more.
find is a command-line utility that locates files based on some user-specified criteria and either prints the pathname of each matched object or, if ...
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 ...
How to install Babylon.js
Babylon.js is a real time 3D engine using a JavaScript library for displaying 3D graphics in a web browser via HTML5. The source code is available on GitHub and distributed under the Apache License 2.0.--pname-- is a powerful, beautiful, simple, and ...
