Version 3 of string reverse

Updated 2006-11-10 13:09:28 by dkf

string reverse string

Returns a string containing the characters of its input argument, string, in reverse order.

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Implemented in the Changes in Tcl/Tk 8.5, as part of TIP #272[L1 ].

Workaround substitute for 8.4:

 proc string'reverse str {
    set res {}
    set i [string length $str]
    while {$i > 0} {append res [string index $str [incr i -1]]}
    set res
 } ;# RS
 % string'reverse "hello, world"
 dlrow ,olleh

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Implementation notes

This command converts its argument to the "unicode" object type so that it doesn't have to use Tcl_UtfPrev() masses of times.

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