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Each of the sails is created by prepending a "\b" to the spinner character:
"\b" is a backspace character; so, when each sail is printed, it deletes the previous one. In the initial state, "Running:" is followed by two spaces (print q{Running: };); the second space is overwritten by the first sail. "\b", and other special characters, are listed in perlop: Quote and Quote-like Operators. -- Ken In reply to Re^3: Progress Bar in Perl script
by kcott
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