一個奇怪的問題：

#!/bin/bash
set -x
function run {
    local table_arr=(
    "movie"
    "tvplay"
    "comic"
    "shows"
    )

    for val in ${table_arr[@]}; do
        echo $val
    done
}

run
echo ${table_arr[1]}

最終輸出

+ run
+ local 'table_arr=(movie tvplay comic shows)'
+ for val in '${table_arr[@]}'
+ echo '(movie'
(movie
+ for val in '${table_arr[@]}'
+ echo tvplay
tvplay
+ for val in '${table_arr[@]}'
+ echo comic
comic
+ for val in '${table_arr[@]}'
+ echo 'shows)'
shows)
+ echo

可以發(fā)現(xiàn) movie和shows輸出并不正確，
但是如果去掉local關鍵字之后，就沒有這個問題了，很奇怪。

之后我在另外一臺機器測試了一下，沒有這個問題
于是對比了一下兩臺機器bash的版本發(fā)現(xiàn)，

# 有bug的機器
$bash --version
GNU bash(bdsh), version 3.00.22(2)-release (x86_64-redhat-linux-gnu)
Copyright (C) 2004 Free Software Foundation, Inc.

# 無bug的
$ bash --version
GNU bash(bdsh), version 4.1.17(2)-release (x86_64-unknown-linux-gnu)
Copyright (C) 2009 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>

This is free software; you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

最終發(fā)現(xiàn)是版本的問題，更新就OK了