Structuring Nested Arrays

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arraysnested
90%

An array of object, which may have a children property, which is in turn of an array of object (recursion). But each item in the children array might just have a field that is of interest, which can be processed or printed out in this case.,You'd have something like this:,Connect and share knowledge within a single location that is structured and easy to search.

function processItems(arr, level = 0) {
   for (const e of arr) {
      if (e.label || e.groupId) console.log(`${" ".repeat(level * 4)}For ${e.label} ${e.groupId}`);
      if (e.field) console.log(`${" ".repeat(level * 4)}${e.field}`);
      if (e.children)
         processItems(e.children, level + 1);
   }
}

const columnGroups = [{
      label: "Grand Parent1",
      groupId: "gp1",
      children: [{
            label: "Group 1",
            groupId: "group1",
            children: [{
               field: "group1_field1"
            }, {
               field: "group1_field2"
            }]
         },
         {
            label: "Group 2",
            groupId: "group2",
            children: [{
               field: "group2_field1"
            }, {
               field: "group2_field2"
            }]
         }
      ]
   },
   {
      label: "Grand Parent2",
      groupId: "gp2",
      children: [{
         label: "Group 3",
         groupId: "group3",
         children: [{
            label: "Group 4",
            groupId: "group4",
            children: [{
               field: "group4_field1"
            }]
         }]
      }]
   }
];

processItems(columnGroups)
88%

you can not declare a nested native-structure.,6. How do I declare an array of structures (native)? Example of declaring and use,you can not declare a nested ref-structure

Example. Let the native-structure template that describes the book in the library be specified.

struct Book {
   char title[70];
   char author[50];
   int year;
   float price;
};
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72%

The embedded structure enables us to declare the structure inside the structure. Hence, it requires less line of codes but it can not be used in multiple data structures. Consider the following example.,Here, we create two structures, but the dependent structure should be used inside the main structure as a member. Consider the following example.,As you can see, doj (date of joining) is the variable of type Date. Here doj is used as a member in Employee structure. In this way, we can use Date structure in many structures.

Enter employee information ?

   Arun

Delhi

110001

1234567890

Printing the employee information....

name: Arun

City: Delhi

Pincode: 110001

Phone: 1234567890
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65%

Iterate over data in a multidimensional array,Multidimensional arrays are a special kind of nested data structure, which consists of an array, each of whose elements is again an array. Here's an example:, Additional Array Methods

let myFirstSubarray = [
   ["this", "is"],
   ["super", "cool"]
];
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Pretag
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Let's take a look at some multidimensional arrays that have an even deeper nesting structure than the 2D examples we've seen so far.,Create nested, or multidimensional, arrays.,Iterating over multidimensional arrays is tough. Try opening up a new Ruby file in your text editor and writing a method that contains the above code.

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22%

The depth level specifying how deep a nested array structure should be flattened. Defaults to 1. ,A new array with the sub-array elements concatenated into it., The flat() method creates a new array with all sub-array elements concatenated into it recursively up to the specified depth.

flat()
flat(depth)
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