docs:dollarstern
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- | http://buy-levaquin.science/#2268 levaquin buy, | + | ====== $* und $@ - Shell Uebergabeparameter ====== |
+ | |||
+ | Um in einem Shell-Script oder einer Shell-Funktion deren Uebergabeparameter | ||
+ | zu erhalten, gibt es die Variablen $* und *@ . | ||
+ | Diese verhalten sich verschieden. Zusaetzlich variiert das Verhalten je nach Quoting. | ||
+ | |||
+ | Oft findet man die Verwendung von $* **obwohl** dies bei Paramtern mit Leerzeichen | ||
+ | Fehler erzeugt. | ||
+ | |||
+ | Tatsaechlich wird man in den allermeisten Faellen " | ||
+ | |||
+ | Samples: | ||
+ | |||
+ | < | ||
+ | for i in "2 3 4" "5 6 7" ; do echo $i ; done | ||
+ | -> | ||
+ | 2 3 4 | ||
+ | 5 6 7 | ||
+ | |||
+ | x () { for i in $* ; do echo $i; done; } | ||
+ | x "2 3 4" "5 6 7" | ||
+ | -> | ||
+ | 2 | ||
+ | 3 | ||
+ | 4 | ||
+ | 5 | ||
+ | 6 | ||
+ | 7 | ||
+ | |||
+ | x () { for i in " | ||
+ | x "2 3 4" "5 6 7" | ||
+ | -> | ||
+ | 2 3 4 5 6 7 | ||
+ | |||
+ | x () { for i in $@ ; do echo $i; done; } | ||
+ | x "2 3 4" "5 6 7" | ||
+ | -> | ||
+ | 2 | ||
+ | 3 | ||
+ | 4 | ||
+ | 5 | ||
+ | 6 | ||
+ | 7 | ||
+ | |||
+ | x () { for i in " | ||
+ | x "2 3 4" "5 6 7" | ||
+ | -> | ||
+ | 2 3 4 | ||
+ | 5 6 7 | ||
+ | </code> |
docs/dollarstern.txt · Last modified: 2016/03/15 00:12 by 91.89.129.106