The "1" has significance, in the sense that it is the loop body. You could rewrite my code as:

while( $string1 =~ s/B-/BB/ or $string1 =~ s/-B/BB/ ) {
    # Replacement already happened in the while condition
};

[download]

There are other ways, but I find this approach to be closest to your description.

In reply to Re^3: How can I expand my substring? by Corion
in thread How can I expand my substring? by Anonymous Monk

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