Perl:$hashName {"a","b","c"} = "d"是什么意思；？

Question

我正在尝试将大型 perl 程序转换为 Java。在初始化函数中，它使用括号创建一个散列，然后开始赋值。但是随后键变成了逗号分隔的字符串对和三元组。这是什么意思？

 %par=( ...  )

 $par{"symbolChainAny"}=     "*";   # chain name if ...
 $par{"acc2Thresh"}=         16;    # threshold for...
 $par{"txt","copyright"}=       "elided";
 $par{"txt","contactEmail"}=    "elided";

 $par{"txt","modepred","sec"}=  "prediction of secondary structure";
 $par{"txt","modepred","cap"}=  "prediction of secondary structure caps";```

Answer 1

$foo{$x, $y, $z}

相当于

$foo{join($;, $x, $y, $z)}

哪里$;默认为控制字符( "\x1C" )。

不只是相似...

$ diff \
   <( perl -MO=Concise,-exec -e'$foo{$x,$y,$z}' 2>&1 ) \
   <( perl -MO=Concise,-exec -e'$foo{join($;,$x,$y,$z)}' 2>&1 ) \
   && echo identical
identical