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[ruby/optparse] [DOC] Mark up constant and method names as code
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@ -1,10 +1,10 @@
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== Tutorial
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=== Why \OptionParser?
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=== Why +OptionParser+?
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When a Ruby program executes, it captures its command-line arguments
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and options into variable ARGV.
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This simple program just prints its \ARGV:
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This simple program just prints its +ARGV+:
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:include: ruby/argv.rb
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@ -18,7 +18,7 @@ the command-line options.
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OptionParser offers methods for parsing and handling those options.
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With \OptionParser, you can define options so that for each option:
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With +OptionParser+, you can define options so that for each option:
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- The code that defines the option and code that handles that option
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are in the same place.
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@ -66,10 +66,10 @@ The class also has method #help, which displays automatically-generated help tex
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=== To Begin With
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To use \OptionParser:
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To use +OptionParser+:
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1. Require the \OptionParser code.
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2. Create an \OptionParser object.
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1. Require the +OptionParser+ code.
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2. Create an +OptionParser+ object.
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3. Define one or more options.
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4. Parse the command line.
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@ -92,9 +92,9 @@ the block defined for the option is called with the argument value.
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An invalid option raises an exception.
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Method #parse!, which is used most often in this tutorial,
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removes from \ARGV the options and arguments it finds,
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removes from +ARGV+ the options and arguments it finds,
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leaving other non-option arguments for the program to handle on its own.
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The method returns the possibly-reduced \ARGV array.
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The method returns the possibly-reduced +ARGV+ array.
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Executions:
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@ -115,7 +115,7 @@ Executions:
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=== Defining Options
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A common way to define an option in \OptionParser
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A common way to define an option in +OptionParser+
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is with instance method OptionParser#on.
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The method may be called with any number of arguments
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@ -522,11 +522,11 @@ Executions:
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=== Argument Converters
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An option can specify that its argument is to be converted
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from the default \String to an instance of another class.
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from the default +String+ to an instance of another class.
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There are a number of built-in converters.
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Example: File +date.rb+
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defines an option whose argument is to be converted to a \Date object.
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defines an option whose argument is to be converted to a +Date+ object.
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The argument is converted by method Date#parse.
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:include: ruby/date.rb
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@ -546,7 +546,7 @@ for both built-in and custom converters.
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=== Help
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\OptionParser makes automatically generated help text available.
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+OptionParser+ makes automatically generated help text available.
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The help text consists of:
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@ -614,16 +614,16 @@ Execution:
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=== Top List and Base List
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An \OptionParser object maintains a stack of \OptionParser::List objects,
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An +OptionParser+ object maintains a stack of +OptionParser::List+ objects,
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each of which has a collection of zero or more options.
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It is unlikely that you'll need to add or take away from that stack.
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The stack includes:
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- The <em>top list</em>, given by \OptionParser#top.
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- The <em>base list</em>, given by \OptionParser#base.
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- The <em>top list</em>, given by +OptionParser#top+.
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- The <em>base list</em>, given by +OptionParser#base+.
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When \OptionParser builds its help text, the options in the top list
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When +OptionParser+ builds its help text, the options in the top list
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precede those in the base list.
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=== Defining Options
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@ -632,31 +632,31 @@ Option-defining methods allow you to create an option, and also append/prepend i
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to the top list or append it to the base list.
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Each of these next three methods accepts a sequence of parameter arguments and a block,
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creates an option object using method \Option#make_switch (see below),
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creates an option object using method +Option#make_switch+ (see below),
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and returns the created option:
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- \Method \OptionParser#define appends the created option to the top list.
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- \Method +OptionParser#define+ appends the created option to the top list.
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- \Method \OptionParser#define_head prepends the created option to the top list.
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- \Method +OptionParser#define_head+ prepends the created option to the top list.
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- \Method \OptionParser#define_tail appends the created option to the base list.
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- \Method +OptionParser#define_tail+ appends the created option to the base list.
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These next three methods are identical to the three above,
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except for their return values:
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- \Method \OptionParser#on is identical to method \OptionParser#define,
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- \Method +OptionParser#on+ is identical to method +OptionParser#define+,
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except that it returns the parser object +self+.
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- \Method \OptionParser#on_head is identical to method \OptionParser#define_head,
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- \Method +OptionParser#on_head+ is identical to method +OptionParser#define_head+,
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except that it returns the parser object +self+.
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- \Method \OptionParser#on_tail is identical to method \OptionParser#define_tail,
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- \Method +OptionParser#on_tail+ is identical to method +OptionParser#define_tail+,
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except that it returns the parser object +self+.
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Though you may never need to call it directly,
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here's the core method for defining an option:
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- \Method \OptionParser#make_switch accepts an array of parameters and a block.
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- \Method +OptionParser#make_switch+ accepts an array of parameters and a block.
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See {Parameters for New Options}[optparse/option_params.rdoc].
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This method is unlike others here in that it:
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- Accepts an <em>array of parameters</em>;
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@ -668,7 +668,7 @@ here's the core method for defining an option:
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=== Parsing
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\OptionParser has six instance methods for parsing.
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+OptionParser+ has six instance methods for parsing.
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Three have names ending with a "bang" (<tt>!</tt>):
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@ -699,9 +699,9 @@ Each of these methods:
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(see {Keyword Argument into}[#label-Keyword+Argument+into]).
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- Returns +argv+, possibly with some elements removed.
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==== \Method parse!
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==== \Method +parse!+
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\Method parse!:
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\Method +parse!+:
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- Accepts an optional array of string arguments +argv+;
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if not given, +argv+ defaults to the value of OptionParser#default_argv,
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@ -756,9 +756,9 @@ Processing ended by non-option found when +POSIXLY_CORRECT+ is defined:
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["--xxx", true]
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Returned: ["input_file.txt", "output_file.txt", "-yyy", "FOO"] (Array)
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==== \Method parse
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==== \Method +parse+
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\Method parse:
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\Method +parse+:
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- Accepts an array of string arguments
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_or_ zero or more string arguments.
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["--xxx", true]
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Returned: ["input_file.txt", "output_file.txt", "-yyy", "FOO"] (Array)
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==== \Method order!
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==== \Method +order!+
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Calling method OptionParser#order! gives exactly the same result as
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calling method OptionParser#parse! with environment variable
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+POSIXLY_CORRECT+ defined.
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==== \Method order
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==== \Method +order+
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Calling method OptionParser#order gives exactly the same result as
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calling method OptionParser#parse with environment variable
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+POSIXLY_CORRECT+ defined.
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==== \Method permute!
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==== \Method +permute!+
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Calling method OptionParser#permute! gives exactly the same result as
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calling method OptionParser#parse! with environment variable
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+POSIXLY_CORRECT+ _not_ defined.
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==== \Method permute
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==== \Method +permute+
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Calling method OptionParser#permute gives exactly the same result as
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calling method OptionParser#parse with environment variable
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