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Update cheatsheet with map/forEach examples #431

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Update cheatsheet with map/forEach examples #431

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7 changes: 7 additions & 0 deletions docs/syntax-cheatsheet.md
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Original file line number Diff line number Diff line change
Expand Up @@ -149,6 +149,13 @@ Both JavaScript and Reason support currying, but Reason currying is **built-in a
| `for (let i = 10; i >= 0; i--) {...}` | `for (i in 10 downto 0) {...}` |
| `while (true) {...}` | Same |

## forEach / map

| JavaScript | Reason |
|------------------------------------------|-------------------------------------------|
|`[1,2,3].forEach(i => { console.log(i) })`|`Array.iter(i => { Js.log(i) }, [|1,2,3|])`|
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@yawaramin yawaramin Jun 3, 2019

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Reason version can be Array.iter(Js.log, [|1, 2, 3|])

|`[1,2,3].map(i => { return i + 1 })` |`Array.map(i => i + 1, [|1,2,3|])` |
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@yawaramin yawaramin Jun 3, 2019

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Reason version can be Array.map(succ, [|1, 2, 3|]). Admittedly i => i + 1 is just as valid but if we want to show the idiomatic way of doing things in OCaml/Reason we might as well teach the built-in functions...


## JSX

| JavaScript | Reason |
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