How to create an intermediate variable for multiple use in {#each} block?

[angryziber]

Sometimes you need to calculate/retrieve something while iterating with {#each}.
It would be nice to be able to reuse this calculation, if it needs to be used multiple times, e.g.:

{#each sections as section}
  {#with url = '/path/to/' + section}
    <a href={url}>{url}</a>
  {/with}
{/each}

Is there something in current svelte that would enable this? Or can someting like this {#with} added?

[angryziber]

I discovered that a solution can be hacked using an {#if}, but a proper one would be nice:

<script>let url</script>

{#each sections as section}
  {#if url = '/path/to/' + section}
    <a href={url}>{url}</a>
  {/if}
{/each}

[Conduitry]

Basically a duplicate of #1521. See also #4601 - there's an open PR for {#with}.