shawl | Windows service wrapper for arbitrary commands | Runtime Evironment library

The problem is you have two arrays that you are want to traverse but only one FLATTEN,

thus you need another FLATEN, but the trick here, is that "Kitchen" has only one item in ITEMS which most XML parse incorrectly map to an object (aka this happens in snowflake also).

Thus you have to convert the output of "items" from "Room" to an array before you use it:

Your code expects each object in the array to have both men and women properties. But these properties are in separate array elements. So you need to check whether the property exists before trying to loop over its elements. Otherwise you'll try to get the length of an undefined property.

Similarly, each object in the men or women array has just a single property, not all the properties in the category array.

Looping will be much easier if you assign variables to the current element of the array, so you don't need long expressions with lots of indexes like categories[i][gender[g]][j][category[c]][k]. And using forEach() will simplify this.

You can use Sliver widget instead of using ListView.builder. ListVew wideget will build all widget at once, whereas by using Sliver widget you can build widgets when user scroll the screen. Refer the sample code below.

You could try and wrap the text that varies in length in a div element and fix it's height, so that the longest text doesn't move the table.

In your html: