Done module-bash

Author: pinelli

ex01/hello_world.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/bash
+
+if [ "$1" ]
+   then
+     echo "Hello, $1!"
+   else
+    echo "Hello, World!"
+fi

ex02/ex02.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+ls_out=$(ls -R | xargs -n1)
+echo "$ls_out" > .assist
+found=false
+
+params=$(awk -F " " '{print $1" " $2}' <(echo $1))
+for var in $params
+do
+  grepped=$(grep "$var" .assist)
+  if [[ $grepped ]]; then
+    echo "$grepped"
+    found=true
+  fi
+done
+if [ "$found" = false ]; then 
+  echo "the searched PATH is unexisting"
+fi

ex03/ex03.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+if [ -z $1 ]; then 
+  exit 1
+fi
+touch .f
+for i in "${@:2}"
+do
+	grep -in $i $1 > .f
+	n=$(cat .f | wc -l)
+	echo "$i $n" 
+	awk -F: '{print $1}' .f	
+done
+rm .f

ex04/ex04.sh

@@ -0,0 +1,9 @@
+#!/usr/bin/bash
+if [ -z $1 ] || [ -z $2 ]; then 
+  exit 1
+fi
+echo "$2" | rev | cut -d"/" -f1 | rev
+grep -in $1 $2 > .f
+n=$(cat .f | wc -l)
+awk -F: '{print $1}' .f
+

ex05/ex05.sh

@@ -0,0 +1,54 @@
+#!/bin/bash
+keys=( -s -e -o -m )
+for k in ${keys[*]}
+do
+  key_found=false
+  if [ "$1" = "$k" ]; then
+    key_found=true
+    break
+  fi
+done
+if [ $key_found = false ]; then 
+  echo Error..
+  exit 1
+fi
+if [ -z $2 ]; then
+  :
+elif ! [ "$2" -eq "$2" >& /dev/null ]; then
+    echo "Error.."
+    exit 1
+fi
+cmd=$0
+op=$1
+shift
+res=0
+case $op in
+     "-s")
+         for i in $@
+         do
+           res=$(echo "$res + $i" | bc)  
+         done
+          ;;
+     "-e")
+         for i in $@
+         do
+           [ $((i%2)) -eq 0 ] && res=$(echo "$res + $i" | bc)  
+         done
+          ;;
+     "-o")
+         for i in $@
+         do
+          ! [ $((i%2)) -eq 0 ] && res=$(echo "$res + $i" | bc)  
+         done
+          ;;
+     "-m")
+         for i in $@
+         do
+           res=$(echo "$res + $i" | bc)  
+         done
+         res=$(echo $(( $res / $# ))) 
+         ;;
+        *)
+         ;;
+esac
+echo "$res"

ex06/ex06.sh

@@ -0,0 +1,10 @@
+#!/bin/bash
+map(){
+	com=$1
+	shift
+	for i in "$@"
+	do
+ 		eval "$com $i" 
+	done	
+}
+

ex07/ex07.sh

@@ -0,0 +1,10 @@
+#!/bin/bash
+if [[ -z "$1" ]] || [[ "$1" -eq 0 ]]; then
+	exit 1
+fi
+res=$(head "-$1" resourses/surnames.txt | grep -v 'Q-Chem' | sed "s/\.//g ; s/\-//g" | cat)
+if [[ $res ]]; then
+	echo "$res"
+else
+	echo ""
+fi

ex08/ex08.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+zer=$(grep -o "0" resources/digitfile.txt | wc -l)" zeroes"
+ones=$(grep -o "1" resources/digitfile.txt | wc -l)" ones"
+twos=$(grep -o "2" resources/digitfile.txt | wc -l)" twos"
+th=$(grep -o "3" resources/digitfile.txt | wc -l)" threes"
+ft=$(grep -o "4" resources/digitfile.txt | wc -l)" fours"
+fif=$(grep -o "5" resources/digitfile.txt | wc -l)" fives"
+six=$(grep -o "6" resources/digitfile.txt | wc -l)" sixs"
+sev=$(grep -o "7" resources/digitfile.txt | wc -l)" sevens"
+nin=$(grep -o "8" resources/digitfile.txt | wc -l)" eights"
+ten=$(grep -o "9" resources/digitfile.txt | wc -l)" nines"
+
+echo $zer, $ones, $twos, $th, $ft, $fif, $six, $sev, $nin, $ten
+

ex09/ex09.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+if [ -z $1 ] || [ -z $2 ]; then
+  exit 1
+fi
+if [ $1 = '-u' ] || [ $1 = '--url' ]; then
+  grep -Po '(^|\t)https:[A-Za-z0-9\/\.]+' $2
+elif [ $1 = '-e' ] || [ $1 = '--email' ]; then
+  grep -Po '(^|\t)[A-Za-z0-9\.]+@[A-Za-z0-9\.]+\.[A-Za-z0-9\.]+' $2
+else
+  exit 1
+fi

ex10/ex10.sh

@@ -0,0 +1,8 @@
+#!/bin/bash
+if [ -d $1 ]; then
+  exit 1
+fi
+for i in $@
+do
+  echo "$(awk 'END{print NR}' $i) $i"
+done