尝试比较多个点的版本号,我不知道该怎么做:
Perl 有一个
version
模块似乎可以完成这项工作,但我想知道:
DB<1> use version
DB<2> x '1.2.3' > '1.2.29'
0 ''
DB<3> x '1.2.3' >= '1.2.29'
0 1
DB<4> x '1.2.3' cmp '1.2.29'
0 1
DB<5> x '1.2.3' cmp '1.2.29'
0 1
DB<6> x qv(1.2.3)
0 v1.2.3
DB<7> x qv(1.2.3) > qv(1.2.29)
0 ''
DB<8> x qv(1.2.3) < qv(1.2.29)
0 1
DB<9> x '1.2.3' == '1.2.29'
0 1
DB<10> x v1.2.3
0 "\cA\cB\cC"
DB<11> print v1.2.3
DB<12> print qv(1.2.3)
v1.2.3
所以
qv(1.2.3)
被转换为 v1.2.3
,但是当我打印 v1.2.3
时,它被转换为三个二进制字节(