lup() Instance Public methods Returns the LUP decomposition of the matrix; see LUPDecomposition. a = Matrix[[1, 2], [3, 4]] l, u, p = a.lup l.lower_triangular? # => true u.upper_triangular? # => true p.permutation? # => true l * u == p * a # => true a.lup.solve([2, 5]) # => Vector[(1/1), (1/2)] lup_decomposition

qualified_const_get(path) Instance Public methods

rss() Instance Public methods

canvasx(screen_x, *args) Instance Public methods Also aliased as: canvas_x

style_set(column=nil, *args) Instance Public methods

d.iso8601 â stringd.xmlschema â string Instance Public methods This method is equivalent to strftime('%F').

hostname() Instance Public methods extract the host part of the URI and unwrap brackets for IPv6 addresses. This method is same as #host except brackets for IPv6 (andn future IP) addresses are removed. u = URI(âhttp://[::1]/barâ) p u.hostname #=> â::1â p u.host #=> â[::1]â

chmod() Instance Public methods Change the mode of each FILE to OCTAL-MODE. ruby -run -e chmod -- [OPTION] OCTAL-MODE FILE -v verbose

ele(name, *children) Instance Public methods

elementdecl?() Instance Public methods Content: [ String text ]