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Not much to add to the question. I'm not looking for function autocompletion which is described in several posts, particularly 56984.

I find myself constantly doing asc//Keys and then typing the full thing.

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  • $\begingroup$ I'm not sure if I understand correctly, but are you looking for something like AssociationKeyPicker[asc]? $\endgroup$
    – E. Chan-López
    Commented Oct 19 at 0:21
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    $\begingroup$ I don't know what AssociationKeyPicker is, that doesn't show up when I search for it anywhere. Is it a resource function I can't find? I'm looking for something that (e.g.) when I type asc[longkeyname] it autocompletes after just typing asc[lon kinda like symbol autocompletion. $\endgroup$
    – Tapiocaweasel
    Commented Oct 19 at 0:27
  • $\begingroup$ Apologies, I misunderstood what you were looking for. AssociationKeyPicker is actually something I came up with to dynamically select keys from an Association using an interactive dropdown menu. I now realize you're asking for inline autocompletion when typing something like asc[longkeyname], similar to symbol autocompletion. Unfortunately, Mathematica doesn't natively support that kind of autocompletion for Association keys. $\endgroup$
    – E. Chan-López
    Commented Oct 19 at 0:31
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    $\begingroup$ well, that still sounds potentially very handy! Where can I find it? $\endgroup$
    – Tapiocaweasel
    Commented Oct 19 at 0:34
  • $\begingroup$ Thanks! I'm currently designing AssociationKeyPicker to share as a possible solution. I'm thinking of adding it to my response as a utility for dynamic key selection from an Association. How would you prefer it to work—would you like it to show the keys in a separate window with options, or would you prefer using a PopupMenu right within the notebook? $\endgroup$
    – E. Chan-López
    Commented Oct 19 at 0:39

2 Answers 2

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While this may not strictly address your concern, I’d like to present an alternative that might be useful.

Thinking of something balanced regarding your needs, I came up with a function that allows copying the keys from associations. I included an option to present the association in a Dataset. Here’s the implementation:

CurrentValue[EvaluationNotebook[], {InputAliases, "cck"}] = 
RowBox[{"ClickToCopyKey", "[", 
TemplateBox[{}, "SelectionPlaceholder", 
DisplayFunction -> (FrameBox["\"Association\""] &)], "]"}];

addCompletion = FE`Evaluate[FEPrivate`AddSpecialArgCompletion[#]] &;

addCompletion["ClickToCopyKey" -> {{None}, {"DatasetFormat"}}];

ClickToCopyKey[asc_Association,
type : (Automatic | "DatasetFormat") : Automatic] := 
Module[{assoc},
assoc = Association@KeyValueMap[Rule @@ {ClickToCopy[#1], #2} &]@asc;
Switch[type, Automatic, assoc, "DatasetFormat", Dataset[assoc]]]

The alias implementation is due to @CarlWoll and can be found at:

Input alias having a placeholder which gets selected when the alias is used

The argument completion is due to @Szabolcs, and can be found at:

Argument completions for user-defined functions

I think you can build a dynamic selection function using PopupMenu or with a DialogInput (I'm working on it), as I put in the comments, but ClickToCopyKey might be a good start if you just want to copy keys.

Please try ClickToCopyKey and comment if you find it useful for something you need.

Note: You might also want an implementation where clicking on a key retrieves its corresponding value.

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No

(this is where I add more characters to make this acceptable as an answer)

edit: typing asc//Keys and then copying the key is a great way to do what the OP wants to do

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