Dear list,

When I read some source code, I find lot of place used  symbol <<- , e.g.

lastTime <<- newTime;

What is the meaning here?

Also, I find some method with the name start with dot, e.g.

.RowStandardizeCentered = function(x) {
        div = sqrt( rowSums(x^2) );
        div[ div == 0 ] = 1;
        return( x/div );
}

What is the special meaning for the method name start with a dot?

Thank you very much in advance.

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