On 13-02-16 6:29 PM, Duncan Murdoch wrote:
On 13-02-16 10:22 AM, Hadley Wickham wrote:
This is a little tricky for the deparser. It sees a call to a function
which was determined by an expression. Sometimes you want parens, sometimes
you don't. For example, if getfun(y) returns a function, it
vel-boun...@r-project.org] On
> Behalf
> Of Hadley Wickham
> Sent: Saturday, February 16, 2013 7:22 AM
> To: Duncan Murdoch
> Cc: r-devel@r-project.org
> Subject: Re: [Rd] Printing of anonymous functions in calls is sub-optimal
>
> > This is a little tricky for the depa
On 13-02-16 10:22 AM, Hadley Wickham wrote:
This is a little tricky for the deparser. It sees a call to a function
which was determined by an expression. Sometimes you want parens, sometimes
you don't. For example, if getfun(y) returns a function, it's clearer to
display a call as getfun(y)(x)
On 13-02-16 10:19 AM, Hadley Wickham wrote:
On Sat, Feb 16, 2013 at 12:24 AM, Bert Gunter wrote:
As there has been no response to this ...
Why not simply:
g <- substitute(f(x),list(f=function(x){x+1})) ## with curly braces
g
function (x)
{
x + 1
}(x)
x <- 2
eval(g)
[1] 3
Thomas Lum
> This is a little tricky for the deparser. It sees a call to a function
> which was determined by an expression. Sometimes you want parens, sometimes
> you don't. For example, if getfun(y) returns a function, it's clearer to
> display a call as getfun(y)(x) than (getfun(y))(x).
>
> I'll see if
On Sat, Feb 16, 2013 at 12:24 AM, Bert Gunter wrote:
> As there has been no response to this ...
>
> Why not simply:
>
>> g <- substitute(f(x),list(f=function(x){x+1})) ## with curly braces
>> g
> function (x)
> {
> x + 1
> }(x)
>> x <- 2
>> eval(g)
> [1] 3
Thomas Lumley sent me a similar sug
On 13-02-15 10:45 AM, Hadley Wickham wrote:
e.g.
substitute(f(x), list(f = function(x) x + 1))
# function (x)
# x + 1(x)
An extra pair of parentheses would really help:
(function(x)
x + 1)(x)
(Better indenting etc would be nice, but not necessary for correct
understand of the code)
This is
As there has been no response to this ...
Why not simply:
> g <- substitute(f(x),list(f=function(x){x+1})) ## with curly braces
> g
function (x)
{
x + 1
}(x)
> x <- 2
> eval(g)
[1] 3
Cheers,
Bert
On Fri, Feb 15, 2013 at 7:45 AM, Hadley Wickham wrote:
> e.g.
>
> substitute(f(x), list(f = f
e.g.
substitute(f(x), list(f = function(x) x + 1))
# function (x)
# x + 1(x)
An extra pair of parentheses would really help:
(function(x)
x + 1)(x)
(Better indenting etc would be nice, but not necessary for correct
understand of the code)
Hadley
--
Chief Scientist, RStudio
http://had.co.nz/
