Example of the use of hundreds of semicolons and literal values in Ruby: ruby percent

Example of the use of hundreds of semicolons and literal values in Ruby: ruby percent

Use % () (abbreviated as % Q) for a single line string that requires interpolation and embedding double quotation marks ). Multi-line string, preferably heredocs.

  # bad (no interpolation needed)  %(<div class="text">Some text</div>)  # should be '<div class="text">Some text</div>'  # bad (no double-quotes)  %(This is #{quality} style)  # should be "This is #{quality} style"  # bad (multiple lines)  %(<div>\n<span class="big">#{exclamation}</span>\n</div>)  # should be a heredoc.  # good (requires interpolation, has quotes, single line)  %(<tr><td class="name">#{name}</td>)

Do not use % q for strings without 'and. Unless many characters need to be escaped, the normal string is more readable.

  # bad  name = %q(Bruce Wayne)  time = %q(8 o'clock)  question = %q("What did you say?")  # good  name = 'Bruce Wayne'  time = "8 o'clock"  question = '"What did you say?"'

The % r method is only applicable to defining regular expressions that contain multiple symbols.

  # bad  %r(\s+)  # still bad  %r(^/(.*)$)  # should be /^\/(.*)$/  # good  %r(^/blog/2011/(.*)$)

% X is not used unless the reverse quotation marks are used in the called command (this is not common.

  # bad  date = %x(date)  # good  date = `date`  echo = %x(echo `date`)

Do not use % s. Community tends to use: "some string" to create symbols containing white spaces.

() Is used to represent the literal volume with %, except for % r. Because braces often appear in regular expressions in many scenarios, for example, {as a separator may be a better choice, depending on the content of the regular expression.

  # bad  %w[one two three]  %q{"Test's king!", John said.}  # good  %w(one two three)  %q("Test's king!", John said.)