Functional help with ? operator

Displays help and structure of an object, or help of a package. Two syntax sugars are added to enhance utils::?. One is object?. which works as if ?object. Another is package?p which works as if help(package = package)

`?`(e1, e2)

Arguments

e1	A topic of document. Refer to topic argument described in utils::`?`.
e2	. and p have special meanings as documented above. Otherwise, e2 is same as type argument of utils::`?`.

Examples

# Identical to help(identity); print(identity)
?identity
#> function (x) 
#> x
#> <environment: namespace:base>
identity?.  # The same
#> function (x) 
#> x
#> <environment: namespace:base>

# Identical to help(iris); str(iris)
?iris
#> 'data.frame':	150 obs. of  5 variables:
#>  $ Sepal.Length: num  5.1 4.9 4.7 4.6 5 5.4 4.6 5 4.4 4.9 ...
#>  $ Sepal.Width : num  3.5 3 3.2 3.1 3.6 3.9 3.4 3.4 2.9 3.1 ...
#>  $ Petal.Length: num  1.4 1.4 1.3 1.5 1.4 1.7 1.4 1.5 1.4 1.5 ...
#>  $ Petal.Width : num  0.2 0.2 0.2 0.2 0.2 0.4 0.3 0.2 0.2 0.1 ...
#>  $ Species     : Factor w/ 3 levels "setosa","versicolor",..: 1 1 1 1 1 1 1 1 1 1 ...
iris?.  # The same
#> 'data.frame':	150 obs. of  5 variables:
#>  $ Sepal.Length: num  5.1 4.9 4.7 4.6 5 5.4 4.6 5 4.4 4.9 ...
#>  $ Sepal.Width : num  3.5 3 3.2 3.1 3.6 3.9 3.4 3.4 2.9 3.1 ...
#>  $ Petal.Length: num  1.4 1.4 1.3 1.5 1.4 1.7 1.4 1.5 1.4 1.5 ...
#>  $ Petal.Width : num  0.2 0.2 0.2 0.2 0.2 0.4 0.3 0.2 0.2 0.1 ...
#>  $ Species     : Factor w/ 3 levels "setosa","versicolor",..: 1 1 1 1 1 1 1 1 1 1 ...

# Identical to help(package = stats)
stats?p