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@Code-Hex

Code-Hex/doublemap.pl

Created November 11, 2014 14:05
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二重mapの動きを知るためのコード
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doublemap.pl
#!/usr/bin/perl
use strict;
use warnings;
my $num = 0;
map{$num += $_} map{$num += $_} 1..2;
print $num;
@Code-Hex
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簡単に、1~2までを扱うことにしました。
それぞれ二つのmapを左map、右mapとします。

  1. 右mapに1を $_ に代入。（この時、$num = 1）
  2. 左mapに1を $_ に代入。（この時、$num = 2）
  3. 右mapに2を $_ に代入。（この時、$num = 4）
  4. 左mapに1を $_ に代入。（この時、$num = 5）
  5. 左mapに2を $_ に代入。（この時、$num = 7）

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