• Lobachevsky (8/8) Jan 06 2013 Is there any plan to extend array-wise expressions to include
• David Nadlinger (7/9) Jan 06 2013 Currently, there are no plans for adding a feature like this – at
• Xinok (8/16) Jan 06 2013 Performing this action would require several calls to foo. By

"Lobachevsky" <ibeam2000 gmail.com> writes:

Is there any plan to extend array-wise expressions to include 
calls to arbitrary "scalar" functions, i.e.

auto a = [1.2, 2.3, 3.4];
auto b = [7.1, 8.2, 9.3];
auto c = new double[3];
c[] = sin( 4 * a[] + b[] );

or

c[] = foo(a[], b[], 42);

"David Nadlinger" <see klickverbot.at> writes:

On Sunday, 6 January 2013 at 15:39:03 UTC, Lobachevsky wrote:
 Is there any plan to extend array-wise expressions to include 
 calls to arbitrary "scalar" functions

Currently, there are no plans for adding a feature like this – at 
least I'm not aware of any.

However, you can just use std.algorithm.map and write map!sin(…), 
possibly followed by .array() (import std.array) for eager 
evaluation.

David

"Xinok" <xinok live.com> writes:

On Sunday, 6 January 2013 at 15:39:03 UTC, Lobachevsky wrote:
 Is there any plan to extend array-wise expressions to include 
 calls to arbitrary "scalar" functions, i.e.

 auto a = [1.2, 2.3, 3.4];
 auto b = [7.1, 8.2, 9.3];
 auto c = new double[3];
 c[] = sin( 4 * a[] + b[] );

 or

 c[] = foo(a[], b[], 42);

Performing this action would require several calls to foo. By 
convention, array operations aren't loops; it only calculates the 
R-value once, then sets all elements to the same value. I wrote 
this as a quick example:

http://dpaste.dzfl.pl/4ba03ef6

It does get a random value, but it only calls rand() once so all 
of the elements in the array are set to the same random value.