通配符

seven-elven

while read word && [[ $word != end ]]
do......

请问各位大虾,这里的 [[  ]] 是什么意思,最好给个详细的解释.谢谢了.

liying_gg

用于比较字符串的，不叫通配符。
1 [[ $a == z* ]] # True if $a starts with an "z" (pattern matching).
2 [[ $a == "z*" ]] # True if $a is equal to z* (literal matching).
3
4 [ $a == z* ] # File globbing and word splitting take place.
5 [ "$a" == "z*" ] # True if $a is equal to z* (literal matching).

seven-elven

那为什么不能用[[$word -ne end]]  
用!= 而不用-ne呢

liying_gg

ne是用来比较interger的

seven-elven

谢谢了~：）

liying_gg