Referring to arguments passed to function

Question

Is there a way to get the arguments passed to a function? For example, I have the generic function f, then if I have

f[1,2]

I want to get {1,2}, and if I have

f[Sin[x],Cos[x],4,7]

I want to get {Sin[x],Cos[x],4,7}. Thanks!

[Sin[x],Cos[x],4,7] is not a valid Mathematica expression. Maybe you can try Sequence @@ f[Sin[x], Cos[x], 4, 7] or f[Sin[x], Cos[x], 4, 7] /. f -> Sequence or List @@ f[Sin[x], Cos[x], 4, 7] or f[Sin[x], Cos[x], 4, 7] /. f -> List? — kglr, Jul 04 '17 at 17:11
At least closely related: Converting a list of rules to a list of lists — Kuba, Jul 04 '17 at 20:45

score 2 · Accepted Answer · answered Jul 04 '17 at 17:16

2

List @@ f[1, 2, 3]

{1, 2, 3}

List @@ f[Sin[x], Cos[x], 4, 7]

{Sin[x], Cos[x], 4, 7}

or

f[Sin[x], Cos[x], 4, 7] /. f -> List

{Sin[x], Cos[x], 4, 7}

f[1, 2, 3] /. f -> List

{1, 2, 3}

answered Jul 04 '17 at 17:16

kglr

score 0 · Answer 2 · answered Jul 04 '17 at 19:03

0

you can also do something like this:

f[arg__][p_] := p @@ {arg}
Through[{f[1, 2], f[Sin[x], Cos[x], 4, 7]}[List]]

(* {{1, 2}, {Sin[x], Cos[x], 4, 7}} *)

answered Jul 04 '17 at 19:03

Ali Hashmi

2 Answers2