perl 模块
!/usr/bin/perluse List::Util
####找最大、最小、求和等值
qw/max min sum maxstr minstr shuffle/;
@a = ('hello', 'ok', 'china', 'unix');
print max 1..10; #10
print min 1..10; #1
print sum 1..10; #55
print maxstr @a; #unix
print minstr @a; #china
print shuffle 1..10; #radom order
use List::Util qw(first max maxstr min minstr reduce shuffle sum);
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