From the docs, I've installed the DocOpt with Pkg.add("DocOpt") and created the same naval_fate.jl:
doc = """Naval Fate.
Usage:
naval_fate.jl ship new <name>...
naval_fate.jl ship <name> move <x> <y> [--speed=<kn>]
naval_fate.jl ship shoot <x> <y>
naval_fate.jl mine (set|remove) <x> <y> [--moored|--drifting]
naval_fate.jl -h | --help
naval_fate.jl --version
Options:
-h --help Show this screen.
--version Show version.
--speed=<kn> Speed in knots [default: 10].
--moored Moored (anchored) mine.
--drifting Drifting mine.
"""
using DocOpt # import docopt function
arguments = docopt(doc, version=v"2.0.0")
dump(arguments)
But when I run julia naval_fate.jl ship new FOO, I didn't dump the results as shown in the documentation. I got this instead:
Dict{AbstractString,Any}
slots: Array{UInt8}((64,)) UInt8[0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 … 0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x00,0x01]
keys: Array{AbstractString}((64,))
1: #undef
2: #undef
3: #undef
4: #undef
5: #undef
...
60: #undef
61: #undef
62: SubString{String}
string: String " ( ship new <name> ... ) | ( ship <name> move <x> <y> [ --speed=<kn> ] ) | ( ship shoot <x> <y> ) | ( mine ( set | remove ) <x> <y> [ --moored | --drifting ] ) | ( -h | --help ) | ( --version ) "
offset: Int64 58
endof: Int64 3
63: #undef
64: SubString{String}
string: String "--speed <kn>"
offset: Int64 0
endof: Int64 7
vals: Array{Any}((64,))
1: #undef
2: #undef
3: #undef
4: #undef
5: #undef
...
60: #undef
61: #undef
62: Void nothing
63: #undef
64: SubString{String}
string: String "Naval Fate.\n\nUsage:\n naval_fate.jl ship new <name>...\n naval_fate.jl ship <name> move <x> <y> [--speed=<kn>]\n naval_fate.jl ship shoot <x> <y>\n naval_fate.jl mine (set|remove) <x> <y> [--moored|--drifting]\n naval_fate.jl -h | --help\n naval_fate.jl --version\n\nOptions:\n -h --help Show this screen.\n --version Show version.\n --speed=<kn> Speed in knots [default: 10].\n --moored Moored (anchored) mine.\n --drifting Drifting mine.\n\n"
offset: Int64 379
endof: Int64 2
ndel: Int64 0
count: Int64 15
age: UInt64 27
idxfloor: Int64 1
maxprobe: Int64 4
The output shown on the documentation is:
$ julia naval_fate.jl ship new FOO
Dict{String,Any} len 15
remove: Bool false
--help: Bool false
<name>: Array(UTF8String,(1,)) UTF8String["FOO"]
--drifting: Bool false
mine: Bool false
move: Bool false
--version: Bool false
--moored: Bool false
<x>: Nothing nothing
ship: Bool true
new: Bool true
...
Why is that so? Is it because of some cached session?