#!/bin/bash
# 
# Decription: 
#  A Shell script used to download the imges from Internet.
# Author:
#  Long Luo
# Date:
#  2014-09-11 00:16:59
#

BASE_URL="https://s.yimg.com/zz/combo?a/i/us/nws/weather/gr/"

# declare STIRNG variable
STRING="Beginning Image download..."

#print var on screen 
echo $STRING

sleep 1
echo "...."

BIG_PNG="ds.png"
PNG=".png"

echo "url="${BASE_URL}
echo "big png="${BIG_PNG}

for ((i=0; i<49;i++)); do
 echo IMG_URL=${BASE_URL}${i}${BIG_PNG}
 echo "final url="${IMG_URL}

 curl ${BASE_URL}${i}${BIG_PNG} -o small/${i}${PNG}
 sleep 1

done

# Method 2

URL_ARRAY=(
'https://s.yimg.com/zz/combo?a/i/us/nws/weather/gr/0d.png'
'https://s.yimg.com/zz/combo?a/i/us/nws/weather/gr/1d.png'
)

NAME_ARRAY=(
'file1.jpg'
'file2.jpg'
)

ELEMENTS=${#URL_ARRAY[@]}

for (( i=0;i<ELEMENTS;i++)); do
 echo ${URL_ARRAY[${i}]}
 echo "saved as ${NAME_ARRAY[${i}]}"
 curl ${URL_ARRAY[${i}]} -o images/${NAME_ARRAY[${i}]}
 sleep 1

done