"Looping": Harlowe (v2.0)

Summary

In programming terminology, a "loop" is a common technique for iterating, moving through one by one, some type of data. In Harlowe, the macros (loop:) and (for:) provide this functionality. Combined with the keywords “each,” to move through all entries, or “where,” to specify some condition, they allow for “looping” through data structures like arrays or datamaps.

In this example, the variable arrayInventory is set to the value of an array containing the strings “Bread”, “Pan”, and “Book”. The (for:) macro is used with the keyword “each” to set the values contained in the array to the temporary variable _temp for each value of the spread out array. The text contained in the associated hook to the (for:) macro is shown each loop with the value of _temp changed for each value in the array.

Live Example

Download: Live Example

Twee Code

:: StoryTitle
Looping in Harlowe

:: Start
<!-- Create an array of the strings "Bread", "Pan", "Book" -->
(set: $arrayInventory to (a: "Bread", "Pan", "Book") )

<!-- For each entry in the expanded array in turn, -->
<!--  set the entry to the temporary variable _temp -->
(for: each _temp, ...$arrayInventory)[
You have _temp.]

Download: Twee Code

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