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Improve let-expression examples (#680)

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Because I did not understand what a `Let Expression` should be and the example code was more confusing as explanatory, I changed the format of the examples a little bit and changed the result.

- It should be clear that the example is just one code-line
- I tried out the example (`pkl eval...`) and get a little bit different result
This commit is contained in:
ManuW
2024-10-14 13:21:08 +02:00
committed by GitHub
parent d720f21149
commit 19c292f9a2
1 changed files with 13 additions and 10 deletions
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23
docs/modules/language-reference/pages/index.adoc
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@@ -3378,10 +3378,11 @@ Here is an example:
[source%tested,{pkl}] [source%tested,{pkl}]
---- ----
birdDiets = let (diets = List("Seeds", "Berries", "Mice")) birdDiets =
List(diets[2], diets[0]) // <1> let (diets = List("Seeds", "Berries", "Mice"))
List(diets[2], diets[0]) // <1>
---- ----
<1> result: `List("Mice", "Seeds")` <1> result: `birdDiets = List("Mice", "Seeds")`
`let` expressions serve two purposes: `let` expressions serve two purposes:
@@ -3392,20 +3393,22 @@ List(diets[2], diets[0]) // <1>
[source%tested,{pkl}] [source%tested,{pkl}]
---- ----
birdDiets = let (diets: List<String> = List("Seeds", "Berries", "Mice")) birdDiets =
diets[2] + diets[0] // <1> let (diets: List<String> = List("Seeds", "Berries", "Mice"))
diets[2] + diets[0] // <1>
---- ----
<1> result: `List("Mice", "Seeds")` <1> result: `birdDiets = List("Mice", "Seeds")`
`let` expressions can be stacked: `let` expressions can be stacked:
[source%tested,{pkl}] [source%tested,{pkl}]
---- ----
birdDiets = let (birds = List("Pigeon", "Barn owl", "Parrot")) birdDiets =
let (diet = List("Seeds", "Mice", "Berries")) let (birds = List("Pigeon", "Barn owl", "Parrot"))
birds.zip(diet) // <1> let (diet = List("Seeds", "Mice", "Berries"))
birds.zip(diet) // <1>
---- ----
<1> result: `List(Pair("Pigeon", "Seeds"), Pair("Barn owl", "Mice"), Pair("Parrot", "Berries"))` <1> result: `birdDiets = List(Pair("Pigeon", "Seeds"), Pair("Barn owl", "Mice"), Pair("Parrot", "Berries"))`
[[type-tests]] [[type-tests]]
=== Type Tests === Type Tests