Iterate a list and adding/grouping components according to its index

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Tue Jul 05 2022 07:59:46 GMT+0000 (Coordinated Universal Time)

Saved by @jen_magpantay #javascript #react.js

// Consider a array that you need to map to display it
// You want to group the array content into pairs
// Each pair will have: open div tag + pair of items + close div tag
// To reach that, use index during the mapping, like below
// Ps.: The list I have to reproduce this has 15 items

var openDiv = "<div>";
var closeDiv = "</div>";
var animation = "--- collapsible content ---";

list.map((item, index) => {
  // call all odd indexes and last item of the list, opening the div before each one
  if (index % 2 === 0 || index === mealList.length - 1) {
    console.log(openDiv);
    console.log(index, item.foodItem);
  }
  // call all even numbers, closing the div after each one
  if (index % 2) {
    console.log(index, item.foodItem);
    console.log(closeDiv);
    console.log(animation);
    console.log(" ");
  }
  // call the last item of the list to close the div
  if (index === mealList.length - 1) {
    console.log(closeDiv);
    console.log(animation);
  }
});

/* 
Output:
<div>
0 Oven Mitt - 13 Inch
1 Lamb - Bones
</div>
--- collapsible content ---
 
<div>
2 Mcguinness - Blue Curacao
3 Pumpkin - Seed
</div>
--- collapsible content ---

<div>
4 Onions - Red Pearl
5 Wine - Rioja Campo Viejo
</div>
--- collapsible content ---

<div>
6 Pepper - Green, Chili
7 Coffee Caramel Biscotti
</div>
--- collapsible content ---

<div>
8 Water - Perrier
9 Bread - Multigrain
</div>
--- collapsible content ---

<div>
10 Veal - Tenderloin, Untrimmed
11 Butcher Twine 4r
</div>
--- collapsible content ---

<div>
12 Extract Vanilla Pure
13 Strawberries - California
</div>
--- collapsible content ---

<div>
14 Nut - Walnut, Chopped
</div>
--- collapsible content ---
*/

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Iterate a list and adding/grouping components according to its index

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