October 2020
Beginner to intermediate
499 pages
9h 13m
Chinese
Content preview from Raku学习手册
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字符串
｜
77
my $string = ' ';
put $string;
Perl 6
的一个“字符”可能包括通用字符数据库（
Universal Character Database
，
UCD
）中的两个或多个元素。
Perl 6
将
UCD
中的元素称为编码（
code
），将其组合
称为“字符”。这不是最准确的术语。在这本书中，字符（
character
）是指字素，码
点（
code point
）表示
UCD
中的一个元素。
为什么这会有影响？
.chars
方法会按字素给出
Str
的长度，即包含多少个字素。考
虑对应“
caterpillar
”的希伯来语单词。它有
11
个字素，但是有
14
个码点：
% perl6
Why does any of that matter? The .chars method tells you the length of the Str in
graphemes. Consider the Hebrew word for “caterpillar.” It has 11 graphemes but 14
code points:
% perl6
> 'ראַלליפּרעטאַק'.chars
11
> 'ראַלליפּרעטאַק'.codes
14
Why the different counts? There are graphemes such as אַ that are more than one
code point (in that case, the two code points ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.