most used %-literals:
| % |
code |
result |
description |
%q |
%q(all `quotes` 'are' "ok") |
"all `quotes` 'are' \"ok\"" |
creates String |
%r |
%r(i_am/a/regexp) |
/i_am\/a\/regexp/ |
creates Regexp |
%w |
%w(abc def ghi) |
["abc", "def", "ghi"] |
splits string into Array |
%x |
%x(ls -a /tmp) |
".\n..\nfile1\nfile2\n" |
alias of `cmd` |
highlighted
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%q(all `quotes` 'are' "ok") => "all `quotes` 'are' \"ok\""
%r(i_am/a/regexp) => /i_am\/a\/regexp/
%w(abc def ghi) => ["abc", "def", "ghi"]
%x(ls -a /tmp) => ".\n..\nfile1\nfile2\n"
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interpolation
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# lowercase 'w': as-is
%w'a #{2+2} b' => ["a", "\#{2+2}", "b"]
# uppercase 'W': interpolate
%W'a #{2+2} b' => ["a", "4", "b"]
# lowercase 'q': as-is
%q'a #{2+2} b' => "a \#{2+2} b"
# uppercase 'Q': interpolate
%Q'a #{2+2} b' => "a 4 b"
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other %-literals
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# %s: convert to symbol
%s'foo' => :foo
# %i: convert to array of symbols - not released yet, will be in Ruby 2.0 ?
%i'foo bar baz' => [:foo, :bar, :baz]
# '%' w/o any letter - alias for %Q
%'a #{2+2} b' => "a 4 b"
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