perl - Perl 的 IO::File 等价于 open($fh, ">:utf8",$path) 是什么？

Question

可以将编码为 utf-8 的文件白化，如下所示:

open my $fh,">:utf8","/some/path" or die $!;

如何使用 IO::File 获得相同的结果，最好是 1 行？
我得到了这个，但它是否也能做到这一点，并且可以在 1 行中完成吗？

my $fh_out = IO::File->new($target_file, 'w');
$fh_out->binmode(':utf8');

作为引用，脚本开始如下:

use 5.020;
use strict;
use warnings;
use utf8;
# code here

Answer 1

是的，您可以 do it in one line .

open accepts one, two or three parameters. With one parameter, it is just a front end for the built-in open function. With two or three parameters, the first parameter is a filename that may include whitespace or other special characters, and the second parameter is the open mode, optionally followed by a file permission value.

[...]

If IO::File::open is given a mode that includes the : character, it passes all the three arguments to the three-argument open operator.

所以你只要这样做。

my $fh_out = IO::File->new('/some/path', '>:utf8');

和你的第一个 open 一样线，因为它通过了。