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旧暦 [n年日記] [更新:"2006/09/09 10:38:48"]

[Unix] /bin/sh の変数 $* と $@ の違い

*: Expands to the positional parameters, starting from one. When the expansion occurs within a double-quoted string it expands to a single field with the value of each parameter separated by the first character of the IFS variable, or by a <space> if IFS is unset.
@: Expands to the positional parameters, starting from one. When the expansion occurs within double-quotes, each posi- tional parameter expands as a separate argument. If there are no positional parameters, the expansion of @ generates zero arguments, even when @ is double-quoted. What this basically means, for example, is if $1 is ``abc'' and $2 is ``def ghi'', then "$@" expands to the two arguments: "abc" "def ghi"

2006年09月09日(土) 旧暦 [n年日記] [更新:"2006/09/09 10:38:48"]