Drew LeSueur drewlesueur

Bash internal field separator (IFS) usage

The IFS internal variable is used to determine what characters Bash defines as word/item boundaries when processing character strings. By default set to whitespace characters of space, tab, and newline.

Running the example ifs.sh, comparing the difference between the default and setting only newline as a boundary we get the following output:

/path/to/first
file
/path/to/second

	I needed to install ffmpeg on my CentOS 7 server. The following web site shows how to install the nux repo.

	https://www.vultr.com/docs/how-to-install-ffmpeg-on-centos

	Here are the commands:

	sudo rpm --import http://li.nux.ro/download/nux/RPM-GPG-KEY-nux.ro

	sudo yum install http://li.nux.ro/download/nux/dextop/el7/x86_64/nux-dextop-release-0-5.el7.nux.noarch.rpm

	package main

	import (
	"fmt"
	"log"
	"os"
	"os/exec"
	"syscall"
	)

	/*<?php
	///public class PhpJava { public static void main(String[] args) { System.out.printf("/%s",
	//\u000A\u002F\u002A
	class PhpJava {
	static function main() {
	echo(//\u000A\u002A\u002F
	"Hello World!");
	}}
	//\u000A\u002F\u002A
	PhpJava::main();

	package main

	// @lizrice, mostly copied from @doctor_julz: https://gist.github.com/julz/c0017fa7a40de0543001

	import (
	"fmt"
	"os"
	"os/exec"
	"syscall"
	)

	#!/bin/bash -e

	echo '
	PATH=$HOME/go/bin:$PATH
	export GOPATH=$HOME
	export CDPATH=.:$HOME/src/golang.org/x:$HOME/go/src:$HOME/src/github.com:$HOME/src/github.com/nf:$HOME/src/github.com/adg
	export EDITOR=vim
	' >> ~/.profile

	sudo apt-get update

	package main

	import (
	"encoding/json"
	"fmt"
	"net/http"
	)

	type test_struct struct {
	Test string

	package main

	import (
	"compress/gzip"
	"io"
	"net/http"
	"strings"
	)

	// Gzip Compression

	package main

	import (
	"log"
	"net/http"
	"net/http/httputil"
	)

	func main() {
	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {

	package main

	import (
	"log"
	"math"
	)

	func Round(val float64, roundOn float64, places int ) (newVal float64) {
	var round float64
	pow := math.Pow(10, float64(places))