G'day ThBo,

Here's a tip for you; prompted by this code: 

    my $temp = $_[1];
    $_[1] = $_[0];
    $_[0] = $temp;

[download]

You can swap two (or more) array elements using array slices. Your three lines above could've been written, without the need for a temporary variable, as: 

    @_[0, 1] = @_[1, 0]

[download]

Here's an example: 

$ perl -wE '@_ = 0 .. 3; say "@_"; @_[0, 1] = @_[1, 0]; say "@_"'
0 1 2 3
1 0 2 3

[download]

— Ken

In reply to Re^2: Sorting a matrix based on the values of columns by kcott
in thread Sorting a matrix based on the values of columns by raghuprasad241

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