On Monday, 15 June 2015 at 15:10:24 UTC, jmh530 wrote:
I wrote a simple function to apply map to a float dynamic array
auto exp(float[] x) {
auto y = x.map!(a => exp(a));
return y;
}
However, the type of the result is MapResult!(__lambda2,
float[]). It seems like some of the things that I might do to a
float[], I can't do to this type, like adding them together. So
I tried to adjust this by adding in a cast to float[], as in
float[] exp(float[] x) {
auto y = x.map!(a => exp(a));
cast(float[]) y;
return y;
}
But I get an error that I can't convert MapResult!(__lambda2,
float[]) to float[].
So I suppose I have two questions: 1) am I screwing up the
cast, or is there no way to convert the MapResult to float[],
2) should I just not bother with map (I wrote an alternate,
longer, version that doesn't use map but returns float[]
properly).
In addition to the other answers you can use
std.algorithm.iteration.each():
---
float[] _exp(float[] x) {
auto result = x.dup;
result.each!(a => exp(a));
return result;
}
---
