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existsMethod(f, signature = character(), where)
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existsMethod(f, signature = character(), where)
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hasMethod(f, signature=character(), where)
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hasMethod(f, signature=character(), where)
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selectMethod(f, signature, optional=FALSE, useInherited,
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selectMethod(f, signature, optional = FALSE, useInherited = TRUE,
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             mlist=getMethods(f), fdef = getGeneric(f))
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             mlist = (if (is.null(fdef)) NULL else getMethods(fdef)),
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             fdef = getGeneric(f, !optional))
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MethodsListSelect(f, env, mlist, fEnv, finalDefault, evalArgs,
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MethodsListSelect(f, env, mlist, fEnv, finalDefault, evalArgs,
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                  useInherited, fdef, resetAllowed)
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                  useInherited, fdef, resetAllowed)
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}
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}
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  While the programming interface for the \pkg{methods} package follows
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  While the programming interface for the \pkg{methods} package follows
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  the reference, the R software is an original implementation, so
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  the reference, the R software is an original implementation, so
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  details in the reference that reflect the S4 implementation may appear
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  details in the reference that reflect the S4 implementation may appear
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  differently in R.  Also, there are extensions to the programming
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  differently in R.  Also, there are extensions to the programming
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  interface developed more recently than the reference.  For a
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  interface developed more recently than the reference.  For a
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  discussion of details and ongoing development, see the web page
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  discussion of details and ongoing development, see the web page
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  \url{http://developer.r-project.org/methodsPackage.html} and the
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  \url{http://developer.r-project.org/methodsPackage.html} and the
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  pointers from that page.
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  pointers from that page.
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}
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}
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\examples{
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\examples{
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setGeneric("testFun", function(x)standardGeneric("testFun"))
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setGeneric("testFun", function(x)standardGeneric("testFun"))