question: public boolean equalsIgnoreCase ( final StrBuilder other ) { if ( this == other ) { return true ; } if ( this . size != other . size ) { return false ; } final char thisBuf [ ] = this . buffer ; final char otherBuf [ ] = other . buffer ; for ( int i = size - 1 ; i >= 0 ; i -- ) { final char c1 = thisBuf [ i ] ; final char c2 = otherBuf [ i ] ; if ( c1 != c2 && Character . toUpperCase ( c1 ) != Character . toUpperCase ( c2 ) ) { return false ; } } return true ; }
target:  Checks the contents of this builder against another to see if they contain the same character content ignoring case.