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Sometimes I only remember parts of a function name and I want find that function name quickly, and if I search in the document center, it will give too much informations related to that and difficult to find what I'm looking for. So is there a way to print out all the MMA functions in alphabetical order in a notebook, so that I can search only in the function names? Thanks.

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Names["System`*"] might be what you are after. – Andy Ross Feb 23 '13 at 17:32
Related: Names["*KnownPart*"] adding the appropriate contexts as needed. – rcollyer Feb 23 '13 at 17:38
up vote 8 down vote accepted

There is Documentation`HelpLookup["guide/AlphabeticalListing"]

If you want to tweak it yourself, you can start with

SetAttributes[makeSearchable, Listable];
(* Thanks @rm-rf *)
makeSearchable[s_String] := Hyperlink[s, "paclet:ref/" <> s]

firstLetter = StringTake[#, 1] &;

 OpenerView@{firstLetter@First@#, Column@makeSearchable@#} & /@ 
    Pick[#, StringMatchQ[#, WordCharacter ..]] &@Names["System`*"], 
    firstLetter] // Column, WindowTitle -> "Function list", 
     WindowElements -> {"VerticalScrollBar"}]

However, the practical approach is, as suggested, to use Names with the "*" character for unknown parts, or better still, Information, as in ?Pl* (or the autocompletion functionality)

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You can also do this without the HelpLookup function. Simply replace Column@makeSearchable@# with Column[Hyperlink[#, "paclet:ref/" <> #] & /@ #]. I like this because clicking a different links does not launch a new doc window (default doc center behaviour) and you can always open a new window with – R. M. Feb 23 '13 at 20:19
@rm-rf that's worth editing in, thanks! – Rojo Feb 23 '13 at 20:22

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