Is there a way one can get a range in descending order? Ex <pre class="prettyprint"><code>[1..4] </code></pre> evaluates to <pre class="prettyprint"><code>> val it : int list = [1; 2; 3; 4] </code></pre> But <pre class="prettyprint"><code>[4..1] </code></pre> evaluates to <pre class="prettyprint"><code>> val it : int list = [] </code></pre> Is there a different syntax to achive this without having to do a <code>List.Reverse</code> ?

You have to do: <pre class="prettyprint"><code>[4..-1..1] </code></pre> The -1 is the step

Fsharp - Range evaluation [duplicate]

Is there a way one can get a range in descending order?

[1..4]

evaluates to

> val it : int list = [1; 2; 3; 4]

But

[4..1]

evaluates to

> val it : int list = []

Is there a different syntax to achive this without having to do a List.Reverse ?

324

asked Mar 13 '13 04:03

You have to do:

[4..-1..1]

The -1 is the step

171

answered Sep 21 '22 04:09

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