最近Stack Overflow上有一群讨厌perl的人,所以我想我应该把我的“关于你最喜欢的语言你讨厌的五件事”的问题带到Stack Overflow上。拿你最喜欢的语言来说,告诉我你讨厌它的五件事。这些可能只是让你烦恼的事情,承认的设计缺陷,公认的性能问题,或任何其他类别。你只需要讨厌它,它必须是你最喜欢的语言。

不要拿它和其他语言比较,也不要谈论你已经讨厌的语言。不要用你最喜欢的语言谈论你喜欢的事情。我只是想听到你讨厌但能容忍的东西,这样你就可以使用所有其他的东西,我想听到你希望别人使用的语言。

每当有人试图把他们最喜欢的语言强加给我时,我就会问这个问题,有时是面试问题。如果有人找不出他最喜欢的工具的5个缺点,那他对它还不够了解,不能提倡它,也不能利用它赚大钱。他还没有在足够多的不同情况下使用它来充分探索它。他把它作为一种文化或宗教来倡导,这意味着如果我不选择他最喜欢的技术,我就错了。

我不在乎你用什么语言。不想使用特定的语言?那就不要。你通过尽职调查做出了明智的选择,但仍然没有使用它?好吧。有时正确的答案是“你有一个强大的编程团队,有良好的实践和丰富的Bar经验。改成Foo是愚蠢的。”


This is a good question for code reviews too. People who really know a codebase will have all sorts of suggestions for it, and those who don't know it so well have non-specific complaints. I ask things like "If you could start over on this project, what would you do differently?" In this fantasy land, users and programmers get to complain about anything and everything they don't like. "I want a better interface", "I want to separate the model from the view", "I'd use this module instead of this other one", "I'd rename this set of methods", or whatever they really don't like about the current situation. That's how I get a handle on how much a particular developer knows about the codebase. It's also a clue about how much of the programmer's ego is tied up in what he's telling me.

憎恨并不是衡量人们了解多少的唯一尺度,但我发现它是一个相当不错的尺度。他们讨厌的事情也让我知道他们对这个话题的思考有多好。


当前回答

Lua

If you do foo.bar(1,2) then 'self' is nil inside the bar method. You must remember to do foo:bar(1,2) instead. I'd rather have that switched ('self' should be defined by default unless you use the ':' operator, or you call a function that isn't a method). Variables are global by default. I'd rather ditch the 'local' keyword and have a 'global' one instead. Undeclared variables are assigned the nil. I'd rather receive an error message. You can sidestep this by manipulating the global env's metatable, but I'd rather have it implemented by default and be able to deactivate it. Multiple returned values on parameters are not handled very nicely. Say you have a function foo() that returns 1,2,3 (three values) and bar() returns 4,5 (two values). If you do print(foo(),bar()) you will get "1,4,5" ... only the "last" tuple is expanded on calls. The # (table length) operator only works in tables indexed with continuous integers. If your table isn't like that and you want to know how many elements does it have, you need to either parse it with a loop, or update a counter each time you insert/remove an element from it.

其他回答

Perl

Mixed use of sigils my @array = ( 1, 2, 3 ); my $array = [ 4, 5, 6 ]; my $one = $array[0]; # not @array[0], you would get the length instead my $four = $array->[0]; # definitely not $array[0] my( $two, $three ) = @array[1,2]; my( $five, $six ) = @$array[1,2]; # coerce to array first my $length_a = @array; my $length_s = @$array; my $ref_a = \@array; my $ref_s = $array; For example none of these are the same: $array[0] # First element of @array @array[0] # Slice of only the First element of @array %array[0] # Syntax error $array->[0] # First element of an array referenced by $array @array->[0] # Deprecated first element of @array %array->[0] # Invalid reference $array{0} # Element of %array referenced by string '0' @array{0} # Slice of only one element of %array referenced by string '0' %array{0} # Syntax error $array->{0} # Element of a hash referenced by $array @array->{0} # Invalid reference %array->{0} # Deprecated Element of %array referenced by string '0' In Perl6 it is written: my @array = ( 1, 2, 3 ); my $array = [ 4, 5, 6 ]; my $one = @array[0]; my $four = $array[0]; # $array.[0] my( $two, $three ) = @array[1,2]; my( $five, $six ) = $array[1,2]; my $length_a = @array.length; my $length_s = $array.length; my $ref_a = @array; my $ref_s = $array; Lack of true OO package my_object; # fake constructor sub new{ bless {}, $_[0] } # fake properties/attributes sub var_a{ my $self = shift @_; $self->{'var_a'} = $_[0] if @_; $self->{'var_a'} } In Perl6 it is written: class Dog is Mammal { has $.name = "fido"; has $.tail is rw; has @.legs; has $!brain; method doit ($a, $b, $c) { ... } ... } Poorly designed regex features /(?=regexp)/; # look ahead /(?<=fixed-regexp)/; # look behind /(?!regexp)/; # negative look ahead /(?<!fixed-regexp)/; # negative look behind /(?>regexp)/; # independent sub expression /(capture)/; # simple capture /(?:don't capture)/; # non-capturing group /(?<name>regexp)/; # named capture /[A-Z]/; # character class /[^A-Z]/; # inverted character class # '-' would have to be the first or last element in # the character class to include it in the match # without escaping it /(?(condition)yes-regexp)/; /(?(condition)yes-regexp|no-regexp)/; /\b\s*\b/; # almost matches Perl6's <ws> /(?{ print "hi\n" })/; # run perl code In Perl6 it is written: / <?before pattern> /; # lookahead / <?after pattern> /; # lookbehind / regexp :: pattern /; # backtracking control / ( capture ) /; # simple capture / $<name>=[ regexp ] /; # named capture / [ don't capture ] /; # non-capturing group / <[A..Z]> /; # character class / <-[A..Z]> /; # inverted character class # you don't generally use '.' in a character class anyway / <ws> /; # Smart whitespace match / { say 'hi' } /; # run perl code Lack of multiple dispatch sub f( int $i ){ ... } # err sub f( float $i ){ ... } # err sub f($){ ... } # occasionally useful In Perl6 it is written: multi sub f( int $i ){ ... } multi sub f( num $i ){ ... } multi sub f( $i where $i == 0 ){ ... } multi sub f( $i ){ ... } # everything else Poor Operator overloading package my_object; use overload '+' => \&add, ... ; In Perl6 it is written: multi sub infix:<+> (Us $us, Them $them) | (Them $them, Us $us) { ... }

C++

太容易随机破坏内存并创建几乎不可能找到的错误(尽管Valgrind在修复这个问题上走了很长的路)。 模板错误消息。 在使用模板时,很容易将所有内容都包含在一个文件中,然后进行愚蠢的编译。 标准库在现代是一个笑话(默认情况下仍然没有线程或网络?) 大量令人讨厌的C语言(特别是所有在short/int/unsigned/等之间的转换)。

Self

没有真正的代码浏览器 数百个小窗户飞舞 周围。 只是一个研究项目, 不够稳定,没有活动 社区。 没有相当快的版本 适用于Linux或Windows。只有Mac OS X。 不支持标准键盘 命令。 哦!关于编写本地插件的文档也太过时了!

R

不是我最喜欢的语言,但我经常使用它,有很多抱怨……

S3对象只是美化了的列表,S4类仍然将所有数据公开给用户 赋值操作符可以是<- ->或=,参见Mike Dewar的咆哮 我的。var是一个非常令人困惑的OO语言变量命名约定,参见谷歌的风格指南 我不应该后悔使用循环 神秘的错误消息

Python:

You usually have the entry point of the program at the end of the file. (Because if it calls any function defined in the module, it has to occur after those functions in the sources.) I hate it when you have to spend time looking for the entry point of a program, so I always have a simple main.py file with: def main(): ... if __name__ == '__main__': main() When an exception is raised, it can only be catched by the main thread. Or something like that. Destructors are quite useless, because when written in Python they may break garbage collection IIRC. I've never figured out how relative imports work in Python 2. I'd like to see more collections in the standard library. For example: linked lists, thread-safe collections, ...