regex - 拆分大写字母和数字

Question

我怎样才能用大写字母和数字拆分一个变量，我的变量看起来像这样

$Var = "HvacSystem8000Series";

需要的结果是:

$Var = "Hvac System 8000 Series";

代码:

$Var =~ s/^[A-Z]/ /igs;

Answer 1

评论中的解释:

$Var = "HvacSystem8000Series";
$Var =~ s/(?<=[[:lower:]])   # Low case before,
          (?=[[:upper:]0-9]) # upper case or digit after;
          |                  # OR
          (?<=[0-9])         # digit before,
          (?=[[:upper:]])    # upper case after?
          /\ /xg;            # Replace with a space.