On Sunday, 29 January 2017 at 21:41:57 UTC, albert-j wrote:
On Saturday, 28 January 2017 at 11:54:58 UTC, cym13 wrote:
[...]

I am trying to wrap my head around lazy evaluation during filtering/mapping, but there's something I don't understand. I want to create an array, square some elements, remove some elements from original array and add the squared ones to the original array:

[...]

You need to do something like this:
auto arrMap = arr.filter!(x => x > 5).map!(x => x^^2).array;

It's because arrMap is lazy evaluated.

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