How to Combine Arrays Based on Unique Items in JavaScript?

Combining Arrays by Unique Items in JavaScript

In JavaScript, you can combine arrays based on unique items using a combination of object properties and loop functions.

Solution:

Start by creating an empty array newCells to store the combined results. Then iterate through each element in the original array:

<code class="js">for (var i = 0; i <p>This code will iterate through the totalCells array and check if an object with the current line number already exists in newCells. If not, it creates a new object with the line number and initializes an empty cellWidth array. Then it pushes the current cell width into the cellWidth array.</p>
<p>The resulting newCells array will contain objects with unique lineNumber properties and arrays of cellWidth values combined based on the line numbers.</p>
<p><strong>Example Output:</strong></p>
<p>Applying the above solution to the provided sample input:</p>
<pre class="brush:php;toolbar:false"><code class="js">totalCells = [
    { cellwidth: 15.552999999999999, lineNumber: 1 },
    { cellwidth: 14, lineNumber: 2 },
    { cellwidth: 14.552999999999999, lineNumber: 2 },
    { cellwidth: 14, lineNumber: 1 }
];

// Code to combine arrays based on unique line numbers
// ...

// Output
console.log(newCells);</code>

Will output:

<code class="js">[
    {
        lineNumber: 1,
        cellWidth: [15.552999999999999, 14],
    },
    {
        lineNumber: 2,
        cellWidth: [14, 14.552999999999999],
    },
]</code>

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