General ⇒ Customize LaTeX / Split cmd name

[arobase]

Is there an alternative to

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\newcommand*\foomycmd{Soccer.}
\newcommand*\barmycmd{Footbal.}

allowing to invoke,

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\foo\mycmd 
\bar\mycmd

instead of

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\foomycmd % Soccer.
\barmycmd % Football

but with the same effect?

PS: this is a follow up to a previous similar question:

Is there a way to selectively override \not? For example,
I'd like to define \not\mycmd as

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\text{not}\mycmd

[cgnieder]

I'm not sure I understand what you want. Do you want to define a command \foomycmd and then \foo\mycmd shall expand to it?

This is possible but you need to define \foo also.

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\documentclass{article}
\usepackage{expl3}
\newcommand*\foomycmd{football}
\newcommand*\barmycmd{soccer}
\ExplSyntaxOn
\cs_new:Npn \foo #1
  {
    \tl_clear:N \l_tmpa_tl
    \tl_set_rescan:Nnn \l_tmpa_tl { \char_set_catcode_letter:N \\ } { #1 }
    \use:c { foo \tl_tail:N \l_tmpa_tl }
  }
\cs_set:Npn \bar #1
  {
    \tl_clear:N \l_tmpa_tl
    \tl_set_rescan:Nnn \l_tmpa_tl { \char_set_catcode_letter:N \\ } { #1 }
    \use:c { bar \tl_tail:N \l_tmpa_tl }
  }
\ExplSyntaxOff

\begin{document}
\foo\mycmd \\
\bar\mycmd
\end{document}

The command \foo takes \mycmd as an argument, strips the backslash and then calls \foomycmd. \foo\othercmd would call \fooothercmd.

If that isn't what you want maybe you can show the real application you have in mind, an actual usage?

Regards