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Rev 74897 Rev 75581
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  \code{TRUE} if \code{x} is a (primitive) function, and \code{FALSE}
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  \code{TRUE} if \code{x} is a (primitive) function, and \code{FALSE}
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  otherwise.
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  otherwise.
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}
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}
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\examples{
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\examples{
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is.function(1) # FALSE
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is.function(1) # FALSE
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is.function(is.primitive)  # TRUE: it is a function, but ..
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is.function (is.primitive) # TRUE: it is a function, but ..
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is.primitive(is.primitive) # FALSE:it's not a primitive one, whereas
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is.primitive(is.primitive) # FALSE: it's not a primitive one, whereas
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is.primitive(is.function)  # TRUE: that one *is*
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is.primitive(is.function)  # TRUE: that one *is*
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}
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}
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\keyword{programming}
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\keyword{programming}