Default not getting set depending on order of options. about slop

[leejarvis]

Are you sure that's the exact script you're using? Because you haven't told Slop that :server takes an argument, so setting a default seems a little pointless. Anyway, with the same script:

slop = Slop.new do
  on :d, :dev, 'Development-mode'
  on :s, :server, 'Start server', default: 3000
end

slop.parse %w[ -s ];    p slop.to_hash # {:dev=>nil, :server=>true}
slop.parse %w[ -d -s ]; p slop.to_hash # {:dev=>true, :server=>true}
slop.parse %w[ -s -d ]; p slop.to_hash # {:dev=>true, :server=>true}

Now, if you tell Slop that server takes an argument, it'll raise a MissingArgumentError on your first example.

[budu]

I forgot to mention my use case! What I want is the :server option to
take an optional argument which is the port the server shall run on, if not
specified the default should be 3000. That use case might not fit Slop, but
there's an easy work around: as zero get set it's quite simple to add a
check for it.

On Mon, Dec 12, 2011 at 5:00 AM, Lee Jarvis <
[email protected]

wrote:

Are you sure that's the exact script you're using? Because you haven't
told Slop that :server takes an argument, so setting a default seems a
little pointless. Anyway, with the same script:

slop = Slop.new do
 on :d, :dev, 'Development-mode'
 on :s, :server, 'Start server', default: 3000
end

slop.parse %w[ -s ];    p slop.to_hash # {:dev=>nil, :server=>true}
slop.parse %w[ -d -s ]; p slop.to_hash # {:dev=>true, :server=>true}
slop.parse %w[ -s -d ]; p slop.to_hash # {:dev=>true, :server=>true}

Now, if you tell Slop that server takes an argument, it'll raise a
MissingArgumentError on your first example.

---

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#41 (comment)

[leejarvis]

You want the :optional flag, which tells Slop this option takes an optional argument:

slop = Slop.new do
  on :s, :server, 'Start server', optional: true, default: 3000
end

slop.parse %w[ -s ];     p slop.to_hash # {:dev=>nil, :server=>3000}
slop.parse %w[ -s 2000]; p slop.to_hash # {:dev=>nil, :server=>"2000"}

If you want Slop to cast the argument to an Integer, use as: Integer