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instance method
OptionParser#def_option
def_option(*opts, &block)
lib/optparse.rb
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# File tmp/rubies/ruby-3.3.0/lib/optparse.rb, line 1540
def define(*opts, &block)
top.append(*(sw = make_switch(opts, block)))
sw[0]
end
Alias of #define
Creates an option from the given parameters params. See Parameters for New Options.
The block, if given, is the handler for the created option. When the option is encountered during command-line parsing, the block is called with the argument given for the option, if any. See Option Handlers.
See also
#define
#define_tail
#def_tail_option
#define_head
also in
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