blocks|key|3112257|text|您声明了fruit_color，但引用了fruit_colors+(请注意后面的S)|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3112258|如果您使用了警告和限制，您就会注意到这一点。|3112259|use+warnings;
use+strict;


Global+symbol+"%25fruit_colors"+requires+explicit+package+name+at+C:\temp\test.pl+line+4.
Global+symbol+"%25fruit_colors"+requires+explicit+package+name+at+C:\temp\test.pl+line+5.|code-block|syntax|javascript|3112260|entityMap^0|4|B|K|C|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]|$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|T|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|U|8|@]|D|@]|E|$K|L]]|$1|M|3|-4|5|6|7|V|8|@]|D|@]|E|$]]]|N|$]]

You're declaring <code>fruit_color</code> but referencing <code>fruit_colors</code> (notice the trailing S)

You would have noticed this had you used warnings and stricture.

<pre><code>use warnings;
use strict;


Global symbol "%fruit_colors" requires explicit package name at C:\temp\test.pl line 4.
Global symbol "%fruit_colors" requires explicit package name at C:\temp\test.pl line 5.
</code></pre>

blocks|key|3112262|text|你有一个打字错误：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3112263|my+%25fruit_color+=+("apple",+"red",+"banana",+"yellow");|code-block|syntax|javascript|3112264|应该是|3112265|my+%25fruit_colors+=++("apple",+"red",+"banana",+"yellow");|3112266|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

You have a typo:

<pre><code>my %fruit_color = ("apple", "red", "banana", "yellow");
</code></pre>

should be 

<pre><code>my %fruit_colors = ("apple", "red", "banana", "yellow");
</code></pre>

blocks|key|4898402|text|第一个错误是没有将以下代码作为第一行：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4898403|use+strict;
use+warnings;|code-block|syntax|javascript|4898404|其次，你有一个拼写错误(如果你一直在使用strict模块，这个错误会更容易被发现)。|4898405|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

The first mistake is not having this as the first lines:

<pre><code>use strict;
use warnings;
</code></pre>

Second, you have a typo ( which would have been easier to spot if you had been using the strict module ).

blocks|key|2826740|text|你的代码中有一个拼写错误，如果你有以下情况，你就会注意到：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2826741|use+warnings;
use+strict;|code-block|syntax|javascript|2826742|在你的代码中。你一直都应该这么做。|2826743|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

You have a typo in your code, which you would have noticed if you had had:

<pre><code>use warnings;
use strict;
</code></pre>

in your code. Which you always should.

blocks|key|4898483|text|伙计，你们这些人真快。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4898484|正如其他人所说：|4898485|4898486|您创建了一个具有一个名称的列表，但随后引用了另一个名称。|unordered-list-item|4898487|如果您使用use+warnings和use+strict，则会收到一条错误消息，告知您该错误。|offset|length|style|CODE|4898488|4898489|要编写清晰且相对无bug的Perl代码，有许多提示和技巧。例如，我不在变量名中使用复数。因此，如果这是一个“水果”或“水果”的问题，我知道它应该是“水果”。我也倾向于使用诸如"fruitColorHash“vs."FruitColorList“即使(驼峰式大小写isNotInStyleAnyMore，然后是Im_an_old_grouchy_developer_who_is_set_in_his_ways).|4898490|Damian+Conway的书Perl+Best+Practices是一本优秀的书，它将帮助您学习所有这些技巧和技巧，从而帮助您避免类似的问题。事实上，这本书被认为是好的Perl编程的试金石，现在有一整节专门介绍Damian+Conway的书，名为Perlstyle，还有一个名为tidyperl的程序，它将帮助重新格式化并指出不遵循Conway示例的地方。|4898491|因此，请继续查看Perldoc中的最佳实践部分(您了解perldoc文档，不是吗？键入命令perldoc并查看所获得的内容)，然后吸收其中的知识。那就去拿康威的书。|4898492|entityMap|0|LINK|mutability|MUTABLE|url|http://oreilly.com/catalog/9780596001735|1|http://perldoc.perl.org/perlstyle.html|2|http://perltidy.sourceforge.net/^0|0|0|0|0|5|C|I|A|0|0|0|F|J|0|3G|9|1|3W|8|2|0|R|7|19|7|0^^$0|@$1|2|3|4|5|6|7|16|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|17|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|18|8|@]|9|@]|A|$]]|$1|E|3|F|5|G|7|19|8|@]|9|@]|A|$]]|$1|H|3|I|5|G|7|1A|8|@$J|1B|K|1C|L|M]|$J|1D|K|1E|L|M]]|9|@]|A|$]]|$1|N|3|-4|5|6|7|1F|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|1G|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|1H|8|@]|9|@$J|1I|K|1J|1|1K]|$J|1L|K|1M|1|1N]|$J|1O|K|1P|1|1Q]]|A|$]]|$1|S|3|T|5|6|7|1R|8|@$J|1S|K|1T|L|M]|$J|1U|K|1V|L|M]]|9|@]|A|$]]|$1|U|3|-4|5|6|7|1W|8|@]|9|@]|A|$]]]|V|$W|$5|X|Y|Z|A|$10|11]]|12|$5|X|Y|Z|A|$10|13]]|14|$5|X|Y|Z|A|$10|15]]]]

Man, you people are quick.

As others have stated:

<ul>
<li>You created a list with one name, but then referenced it to another.</li>
<li>If you used <code>use warnings</code> and <code>use strict</code>, you would have gotten an error message telling you about the error.</li>
</ul>

There are lots of hints and tricks to writing legible and relatively bug free Perl code. For example, I don't use plurals in variable names. Thus, if it's a question of "fruit" or "fruits", I know it should be "fruit". I also tend to say the name of my data types by using terms like "fruitColorHash" vs. "FruitColorList" even though (Camel Casing isNotInStyleAnyMore, but then Im_an_old_grouchy_developer_who_is_set_in_his_ways).

Damian Conway's book <a href="http://oreilly.com/catalog/9780596001735" rel="nofollow">Perl Best Practices</a> is an excellent book that will help you learn all of those tricks and tips that will help you avoid issues like this. In fact, the book is considered such a touchstone of good Perl programming, that there's now an entire section devoted to Damian Conway's book called <a href="http://perldoc.perl.org/perlstyle.html" rel="nofollow">Perlstyle</a>, and a program called <a href="http://perltidy.sourceforge.net/" rel="nofollow">tidyperl</a> that will help reformat and point out places that don't follow Conway's examples.

So, go ahead and look at the Best Practices section in Perldoc (You know about the <code>perldoc</code> documentation, don't you? Type in the command <code>perldoc</code> and see what you get) and absorb the knowledge placed there in. Then get Conway's book.

I tried this code. This isn't working. I am getting no result at output. What mistake am I making?

<pre><code>my %fruit_color = ("apple", "red", "banana", "yellow");
my @fruits = keys %fruit_colors;
my @colors = values %fruit_colors;
print @fruits;
print @colors;
</code></pre>

Codepad link: <a href="http://codepad.org/vDVAxJcp" rel="nofollow">http://codepad.org/vDVAxJcp</a>

What mistake am I making in this Perl code?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

文章

问答

视频

学习中心

腾讯云实验室

直播

竞赛

腾讯云代码分析专区

腾讯iOA零信任安全管理系统专区

腾讯云架构师技术同盟交流圈

腾讯云数据库专区

腾讯云顾问专区

腾讯云原生专区

腾讯混元专区

腾讯云TCE专区

腾讯云Lighthouse专区

腾讯云HAI专区

腾讯云Edgeone专区

腾讯云存储专区

腾讯云智能专区

腾讯轻联专区 

腾讯云开发专区

TAPD专区

腾讯轻量云游戏服专区

腾讯云最具价值专家

腾讯云架构师技术同盟

腾讯云创作之星

腾讯云开发者先锋

腾讯云代码助手

云原生构建

TAPD 敏捷项目管理

Cloud Studio

SDK中心

API中心

命令行工具

涵盖代码开发、场景应用、自动测试全流程，助你从零构建专属AI助手

一站式MCP教程库，解锁AI应用新玩法

我试过这个代码。这不管用。我在输出时没有得到任何结果。我犯了什么错误？my %fruit_color = ("apple", "red", "banana", "yellow");my @fruits = keys %fruit_colors;my @colors = values %fruit_colors;prin...

问我在这段Perl代码中犯了什么错误？
EN

Stack Overflow用户

社区

活动

圈层

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问我在这段Perl代码中犯了什么错误？EN