A concept problem

i have concept @(...) , $(...)
if have 2 script codes.
one @("bbb","aaa","ccc" | sort)[0]
the other $("bbb","aaa","ccc" | sort)[0]
the above outcome aaa

however if change below
one @("aaa" | sort)[0]
the other $("aaa" | sort)[0]
the outcome different.
i not understand different @(...) , $(...). kindly explain me?
thanks,

@() array notation, forces result an array.
 $() sub-expression notation. you can write multiple commands (expressions) inside. result can 1 object or more.


1. @("bbb","aaa","ccc" | sort)[0]
2. $("bbb","aaa","ccc" | sort)[0]


in case of 2 commands above, both returns collection of objects , ask first item in index 0 (e.g. 'aaa').
when change commands to:


1. @("aaa" | sort)[0]
2. $("aaa" | sort)[0]

there nothing sort cause there's 1 object (scalar), when ask powershell return first item gives first char in string, if did:

ps > "aaa"[0]
a

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shay levy [mvp]
http://blogs.microsoft.co.il/blogs/scriptfanatic
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