perl - -> 运算符在 Perl 中有什么作用？

Question

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10 年前关闭。

Possible Duplicate:
What does the -> arrow do in Perl?

我没有 Perl 经验，我需要阅读一些脚本。

我找不到“->”运算符的解释。

你能解释一下'->'运算符在这一行中的作用吗？

$sftp->doSomething( $sPerson, $sCredentials )

Answer 1

见 The Arrow Operator在 perlop:

"-> " is an infix dereference operator, just as it is in C and C++. If the right side is either a [...] , {...} , or a (...) subscript, then the left side must be either a hard or symbolic reference to an array, a hash, or a subroutine respectively. (Or technically speaking, a location capable of holding a hard reference, if it's an array or hash reference being used for assignment.) See perlreftut and perlref.

Otherwise, the right side is a method name or a simple scalar variable containing either the method name or a subroutine reference, and the left side must be either an object (a blessed reference) or a class name (that is, a package name). See perlobj.