14、数据处理全解析：从数组操作到文件格式处理

数据处理全解析：从数组操作到文件格式处理

1. 数组排序与搜索

1.1 数组排序函数 isort

isort 函数用于对命令行参数进行排序。以下是该函数的代码：

isort()
{
  local -a a
  a=( "$1" ) ## put first argument in array for initial comparison
  shift      ## remove first argument
  for e      ## for each of the remaining arguments…
  do
    if [ "$e" \< "${a[0]}" ]                ## does it precede the first element?
    then
      a=( "$e" "${a[@]}" )                  ## if yes, put it first
    elif [ "$e" \> "${a[${#a[@]}-1]}" ]     ## if no, does it go at the end?
    then
      a=( "${a[@]}" "$e" )                  ## if yes, put it at the end
    else                                    ## otherwise,
      n=0
      while [ "${a[$n]}" \< "