str=("hello" "world" "!") #結(jié)果: str: 3 #普通的字符串數(shù)組
echo "str: " ${#str[@]}
str1=("hello world !") #結(jié)果: str1: 1 #普通的字符串數(shù)組
echo "str1: "${#str1[@]}
str2=(`echo "Hello world !"`) #結(jié)果: str2: 3 #等價于 str
echo "str2: " ${#str2[@]} 


function strDeal(){
  param=("$@")
  echo ${param[@]}
  echo $1
  echo $2
  echo $3
}
echo "-----------first----------------"
strDeal "Hello world !" 
echo "-----------second----------------"
strDeal "Hello" "world" "!"
echo "-----------third----------------"
strDeal $str1  #等價于second

#!/bin/sh
#filename:demo.sh
cityRes=""
cityColNum=5
function getCurValue(){
  curValue=""
  colIndex=$1
  rowIndex=$2
  idx=$[$cityColNum*$colIndex+$rowIndex-1]  #通過行列進行計算目標位置
  if [ $idx -le ${#cityRes[@]} ] ;then
    echo ${cityRes[$idx]} #獲取目標結(jié)果
  fi
}

#獲取city表總行數(shù)
function getCityRowNum(){
  echo $[${#cityRes[@]}/$cityColNum-1]
}


cityRes=(`mysql -uroot -p123456 world -e "select * from city"`)  #查詢結(jié)果以數(shù)組來保存，等價于上面的str2
curValue=`getCurValue $1 $2`  #$1為行數(shù) $2為列數(shù)
echo $curValue
rowNum=`getCityRowNum` #獲取總行數(shù)
echo $rowNum

sh demo.sh 1 2