代碼示例：
create_data_with(
first: "Lorem ipsum dolor sit amet, consectetur adipiscing elit.",
second: <<~TEXT
Aenean vel ex bibendum, egestas tortor sit amet, tempus lorem. Ut sit
amet rhoncus eros. Vestibulum ante ipsum primis in faucibus orci
luctus et ultrices posuere cubilia curae; Quisque non risus vel lacus
tristique laoreet. Curabitur quis auctor mauris, nec tempus mauris.
TEXT,
third: "Nunc aliquet ipsum at semper sodales."
)
此行中存在錯誤：
second: <<~TEXT
RuboCop 是這樣描述的：
Lint/Syntax: unterminated string meets end of file
(Using Ruby 3.1 parser; configure using TargetRubyVersion parameter, under AllCops)
second: <<~TEXT
你能告訴我應該是什么語法嗎？我需要保持<<~.
uj5u.com熱心網友回復：
另一種選擇是在方法呼叫之后移動heredoc。但是，由于heredoc 從其識別符號之后的行開始，因此您的方法呼叫不能跨越多行：
create_data_with(first: "foo", second: <<~TEXT, third: "bar")
Aenean vel ex bibendum, egestas tortor sit amet, tempus lorem. Ut sit
amet rhoncus eros. Vestibulum ante ipsum primis in faucibus orci
luctus et ultrices posuere cubilia curae; Quisque non risus vel lacus
tristique laoreet. Curabitur quis auctor mauris, nec tempus mauris.
TEXT
對于更長的值，您可以使用多個 heredocs：
create_data_with(first: <<~FIRST, second: <<~SECOND, third: <<~THIRD)
Lorem ipsum dolor sit amet, consectetur adipiscing elit.
FIRST
Aenean vel ex bibendum, egestas tortor sit amet, tempus lorem. Ut sit
amet rhoncus eros. Vestibulum ante ipsum primis in faucibus orci
luctus et ultrices posuere cubilia curae; Quisque non risus vel lacus
tristique laoreet. Curabitur quis auctor mauris, nec tempus mauris.
SECOND
Nunc aliquet ipsum at semper sodales.
THIRD
uj5u.com熱心網友回復：
使用 heredocs，決議器期望確切的分隔符來關閉文字。你打開TEXT，但你關閉TEXT,并且紅寶石不認為這個字面意思是關閉的。但是，您可以（并且在這種情況下應該）將逗號放在開始分隔符之后。這是一個修復：
create_data_with(
first: "Lorem ipsum dolor sit amet, consectetur adipiscing elit.",
second: <<~TEXT,
Aenean vel ex bibendum, egestas tortor sit amet, tempus lorem. Ut sit
amet rhoncus eros. Vestibulum ante ipsum primis in faucibus orci
luctus et ultrices posuere cubilia curae; Quisque non risus vel lacus
tristique laoreet. Curabitur quis auctor mauris, nec tempus mauris.
TEXT
third: "Nunc aliquet ipsum at semper sodales."
)
你甚至可以通過這種方式呼叫方法。例如，波浪形的heredoc ( <<~TEXT) 以前在rails 中作為<<-TEXT.strip_heredoc
轉載請註明出處，本文鏈接：https://www.uj5u.com/qiye/507560.html