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Checks if is a function using
is.function(x) && (is.null(formals) || length(formals(x)) == formals)
chk_function(x, formals = NULL, x_name = NULL)vld_function(x, formals = NULL)
vld_function(x, formals = NULL)
The chk_ function throws an informative error if the test fails or returns the original object if successful so it can used in pipes.
chk_
The vld_ function returns a flag indicating whether the test was met.
vld_
The object to check.
A count of the number of formal arguments.
A string of the name of object x or NULL.
vld_function(): Validate Function
vld_function()
Other chk_is: chk_array(), chk_atomic(), chk_data(), chk_is(), chk_matrix(), chk_numeric(), chk_s3_class(), chk_s4_class(), chk_vector(), chk_whole_numeric()
chk_array()
chk_atomic()
chk_data()
chk_is()
chk_matrix()
chk_numeric()
chk_s3_class()
chk_s4_class()
chk_vector()
chk_whole_numeric()
# chk_function chk_function(mean) try(chk_function(1)) # vld_function vld_function(mean) vld_function(function(x) x) vld_function(1) vld_function(list(1))
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