Ruby on rails Rails-在助手方法中使用gsub时无效值表达式_Ruby On Rails_Ruby

Ruby on rails Rails-在助手方法中使用gsub时无效值表达式

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Ruby on rails Rails-在助手方法中使用gsub时无效值表达式,ruby-on-rails,ruby,Ruby On Rails,Ruby,我正试图将gsub应用于以下数据： 7:30 AM - 5:00 PM (M-F) 7:30 AM - 12 PM (Sat) 我将按如下方式显示它： <% @region.locations.each do |location | %> <%= location.hours_operation %> <% end %> def break(string) initial1 = string result1 = string.to_s.gsub(/(

我正试图将gsub应用于以下数据：

7:30 AM - 5:00 PM (M-F) 7:30 AM - 12 PM (Sat)

我将按如下方式显示它：

<% @region.locations.each do |location | %>
 <%= location.hours_operation %>
<% end %>

def break(string)
 initial1 = string
 result1 = string.to_s.gsub(/(?<=\) )/, "\n")
 if result1.nil?
   initial1
 else
   result1
 end
end

我在助手中是否做错了什么，或者是否有更简单的方法来应用gsub？

break

是Ruby中的保留关键字，在其实现中定义，您可以查看以下内容：

struct kwtable;
%%
__ENCODING__, {keyword__ENCODING__, keyword__ENCODING__}, EXPR_END
__LINE__, {keyword__LINE__, keyword__LINE__}, EXPR_END
__FILE__, {keyword__FILE__, keyword__FILE__}, EXPR_END
BEGIN, {keyword_BEGIN, keyword_BEGIN}, EXPR_END
END, {keyword_END, keyword_END}, EXPR_END
alias, {keyword_alias, keyword_alias}, EXPR_FNAME|EXPR_FITEM
and, {keyword_and, keyword_and}, EXPR_VALUE
begin, {keyword_begin, keyword_begin}, EXPR_BEG
break, {keyword_break, keyword_break}, EXPR_MID
case, {keyword_case, keyword_case}, EXPR_VALUE
class, {keyword_class, keyword_class}, EXPR_CLASS
def, {keyword_def, keyword_def}, EXPR_FNAME
defined?, {keyword_defined, keyword_defined}, EXPR_ARG
do, {keyword_do, keyword_do}, EXPR_BEG
else, {keyword_else, keyword_else}, EXPR_BEG
elsif, {keyword_elsif, keyword_elsif}, EXPR_VALUE
end, {keyword_end, keyword_end}, EXPR_END
ensure, {keyword_ensure, keyword_ensure}, EXPR_BEG
false, {keyword_false, keyword_false}, EXPR_END
for, {keyword_for, keyword_for}, EXPR_VALUE
if, {keyword_if, modifier_if}, EXPR_VALUE
in, {keyword_in, keyword_in}, EXPR_VALUE
module, {keyword_module, keyword_module}, EXPR_VALUE
next, {keyword_next, keyword_next}, EXPR_MID
nil, {keyword_nil, keyword_nil}, EXPR_END
not, {keyword_not, keyword_not}, EXPR_ARG
or, {keyword_or, keyword_or}, EXPR_VALUE
redo, {keyword_redo, keyword_redo}, EXPR_END
rescue, {keyword_rescue, modifier_rescue}, EXPR_MID
retry, {keyword_retry, keyword_retry}, EXPR_END
return, {keyword_return, keyword_return}, EXPR_MID
self, {keyword_self, keyword_self}, EXPR_END
super, {keyword_super, keyword_super}, EXPR_ARG
then, {keyword_then, keyword_then}, EXPR_BEG
true, {keyword_true, keyword_true}, EXPR_END
undef, {keyword_undef, keyword_undef}, EXPR_FNAME|EXPR_FITEM
unless, {keyword_unless, modifier_unless}, EXPR_VALUE
until, {keyword_until, modifier_until}, EXPR_VALUE
when, {keyword_when, keyword_when}, EXPR_VALUE
while, {keyword_while, modifier_while}, EXPR_VALUE
yield, {keyword_yield, keyword_yield}, EXPR_ARG
%%
#endif

如果要在使用的参数为nil时检查并返回特定值，则可以在gsub操作之前添加一个返回：

def method_name(string)
  return string if string.nil?
  string.to_s.gsub(/(?<=\) )/, "\n")
end

def方法名称（字符串）
如果string.nil返回字符串？
string.to_s.gsub（/（？我不建议使用break作为方法名。它似乎是一个保留关键字。首先将break更改为其他名称。它在
struct kwtable;
%%
__ENCODING__, {keyword__ENCODING__, keyword__ENCODING__}, EXPR_END
__LINE__, {keyword__LINE__, keyword__LINE__}, EXPR_END
__FILE__, {keyword__FILE__, keyword__FILE__}, EXPR_END
BEGIN, {keyword_BEGIN, keyword_BEGIN}, EXPR_END
END, {keyword_END, keyword_END}, EXPR_END
alias, {keyword_alias, keyword_alias}, EXPR_FNAME|EXPR_FITEM
and, {keyword_and, keyword_and}, EXPR_VALUE
begin, {keyword_begin, keyword_begin}, EXPR_BEG
break, {keyword_break, keyword_break}, EXPR_MID
case, {keyword_case, keyword_case}, EXPR_VALUE
class, {keyword_class, keyword_class}, EXPR_CLASS
def, {keyword_def, keyword_def}, EXPR_FNAME
defined?, {keyword_defined, keyword_defined}, EXPR_ARG
do, {keyword_do, keyword_do}, EXPR_BEG
else, {keyword_else, keyword_else}, EXPR_BEG
elsif, {keyword_elsif, keyword_elsif}, EXPR_VALUE
end, {keyword_end, keyword_end}, EXPR_END
ensure, {keyword_ensure, keyword_ensure}, EXPR_BEG
false, {keyword_false, keyword_false}, EXPR_END
for, {keyword_for, keyword_for}, EXPR_VALUE
if, {keyword_if, modifier_if}, EXPR_VALUE
in, {keyword_in, keyword_in}, EXPR_VALUE
module, {keyword_module, keyword_module}, EXPR_VALUE
next, {keyword_next, keyword_next}, EXPR_MID
nil, {keyword_nil, keyword_nil}, EXPR_END
not, {keyword_not, keyword_not}, EXPR_ARG
or, {keyword_or, keyword_or}, EXPR_VALUE
redo, {keyword_redo, keyword_redo}, EXPR_END
rescue, {keyword_rescue, modifier_rescue}, EXPR_MID
retry, {keyword_retry, keyword_retry}, EXPR_END
return, {keyword_return, keyword_return}, EXPR_MID
self, {keyword_self, keyword_self}, EXPR_END
super, {keyword_super, keyword_super}, EXPR_ARG
then, {keyword_then, keyword_then}, EXPR_BEG
true, {keyword_true, keyword_true}, EXPR_END
undef, {keyword_undef, keyword_undef}, EXPR_FNAME|EXPR_FITEM
unless, {keyword_unless, modifier_unless}, EXPR_VALUE
until, {keyword_until, modifier_until}, EXPR_VALUE
when, {keyword_when, keyword_when}, EXPR_VALUE
while, {keyword_while, modifier_while}, EXPR_VALUE
yield, {keyword_yield, keyword_yield}, EXPR_ARG
%%
#endif

def method_name(string)
  return string if string.nil?
  string.to_s.gsub(/(?<=\) )/, "\n")
end