str.tr(from_str, to_str) => new_str
Instance Public methods
Returns a copy of str
with the characters in
from_str
replaced by the corresponding characters in
to_str
. If to_str
is shorter than
from_str
, it is padded with its last character in order to
maintain the correspondence.
"hello".tr('el', 'ip') #=> "hippo" "hello".tr('aeiou', '*') #=> "h*ll*" "hello".tr('aeiou', 'AA*') #=> "hAll*"
Both strings may use the c1-c2
notation to denote ranges of
characters, and from_str
may start with a ^
,
which denotes all characters except those listed.
"hello".tr('a-y', 'b-z') #=> "ifmmp" "hello".tr('^aeiou', '*') #=> "*e**o"
The backslash character </code> can be used to escape
<code>^
or -
and is otherwise ignored unless it
appears at the end of a range or the end of the from_str
or
to_str
:
"hello^world".tr("\\^aeiou", "*") #=> "h*ll**w*rld" "hello-world".tr("a\\-eo", "*") #=> "h*ll**w*rld" "hello\r\nworld".tr("\r", "") #=> "hello\nworld" "hello\r\nworld".tr("\\r", "") #=> "hello\r\nwold" "hello\r\nworld".tr("\\\r", "") #=> "hello\nworld" "X['\\b']".tr("X\\", "") #=> "['b']" "X['\\b']".tr("X-\\]", "") #=> "'b'"
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