[Bug-apl] Two questions

[Christian Robert]

      )clear
CLEAR WS
      ⎕pw←500
      )copy Convert2 ∆length
SAVED 2015-03-27 16:52:16 (GMT-4)
      24 ⎕cr ⊃
┌2─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┐
│┌5────┐ 
┌13──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┐│
││meter│ 2┌2─┐    ┌2─┐    ┌2─┐     ┌2─┐    ┌2─┐   ┌5────┐ ┌2─┐     ┌9────────┐  
        ┌6─────┐         ┌4───┐     ┌4───┐     ┌4───┐     ┌4───┐      ││
│└─────┘ ││nm│    │um│    │mm│     │cm│    │dc│   │meter│ │km│     │lightyear│  
        │parsec│         │inch│     │feet│     │yard│     │mile│      ││
│        │└──┘    └──┘    └──┘     └──┘    └──┘   └─────┘ └──┘     └─────────┘  
        └──────┘         └────┘     └────┘     └────┘     └────┘      ││
│        │┌5────┐ ┌5────┐ ┌6─────┐ ┌5────┐ ┌4───┐ ┌→┐     ┌6─────┐ 
┌18────────────────┐ ┌14────────────┐ ┌8───────┐ ┌8───────┐ ┌8───────┐ 
┌10────────┐││
│        ││v÷1E9│ │v÷1E6│ │v÷1000│ │v÷100│ │v÷10│ │v│     │v×1000│ 
│v×9454254955488000│ │v×3.0856776E16│ │v×0.0254│ │v×0.3048│ │v×0.9144│ 
│v×1609.344│││
│        │└─────┘ └─────┘ └──────┘ └─────┘ └────┘ └─┘     └──────┘ 
└──────────────────┘ └──────────────┘ └────────┘ └────────┘ └────────┘ 
└──────────┘││
│        
└∊───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┘│
└∊∊────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┘

My first first question is, is there any method to update the formula into 
'∆length' for example
to change the 'v×9454254955488000' into for example 'v×9454254955488E3' in a 
single line assignement
without using any temporary variables ?

I though I can do that with the diadic '⊃' but did not succeed.


My second question is about ")dump sample" of this workspace (to include it in 
this mail);
on reload of sample the '∆length' variable is different from the original one.
See the first 4 lines of this email.


I've also seen some days ago "2 ⎕tf 'varname'" removing an "∊" from what it 
supposed to do, may be related.


I Know that 2 questions in one mail is bad, but you can answer one at a time.



Xtian.

∆length←'meter' (2 13⍴'nm' 'um' 'mm' 'cm' 'dc' 'meter' 'km' 'lightyear' 
'parsec' 'inch' 'feet' 'yard' 'mile' 'v÷1E9' 'v÷1E6' 'v÷1000' 'v÷100' 'v÷10' 
'v' 'v×1000' 'v×9454254955488000' 'v×3.0856776E16' 'v×0.0254' 'v×0.3048' 
'v×0.9144' 'v×1609.344')