dfdxi(f,fx,x,i) Instance Public methods Computes the derivative of f at x. fx is the value of f at x.

sockopt.data => string Instance Public methods returns the socket option data as a string. p Socket::Option.new(:INET6, :IPV6, :RECVPKTINFO, [1].pack("i!")).data #=> "\x01\x00\x00\x00"

screenwidth(win) Class Public methods

command(cmd = Proc.new) Instance Public methods

which(name) Class Public methods

to_feed() Instance Public methods

resource_errors() Instance Protected methods

send_file(path, options = {}) Instance Protected methods Sends the file. This uses a server-appropriate method (such as X-Sendfile) via the Rack::Sendfile middleware. The header to use is set via config.action_dispatch.x_sendfile_header. Your server can also configure this for you by setting the X-Sendfile-Type header. Be careful to sanitize the path parameter if it is coming from a web page. send_file(params[:path]) allows a malicious user to download any file on your server. Opti

proxy2(prefix=nil, *args) Instance Public methods Almost the same like #proxy only that a call on the returned XMLRPC::Client::Proxy object will return two parameters. See #call2

root?() Instance Public methods Predicate method for root directories. Returns true if the pathname consists of consecutive slashes. It doesn't access the filesystem. So it may return false for some pathnames which points to roots such as /usr/...