如何获取Perl中的字符串的长度？

发布时间：2020-12-15 21:25:59 所属栏目：大数据来源：网络整理

导读：什么是perl等价于strlen()？解决方法 perldoc -f length length EXPR length Returns the length in characters of the value of EXPR. If EXPR is omitted,returns length of $_. Note that this cannot be used on an entire array or hash to find out h

什么是perl等价于strlen()？

解决方法

perldoc -f length

   length EXPR
   length  Returns the length in characters of the value of EXPR.  If EXPR is
           omitted,returns length of $_.  Note that this cannot be used on an
           entire array or hash to find out how many elements these have.  For
           that,use "scalar @array" and "scalar keys %hash" respectively.

           Note the characters: if the EXPR is in Unicode,you will get the num-
           ber of characters,not the number of bytes.  To get the length in
           bytes,use "do { use bytes; length(EXPR) }",see bytes.

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