JavaScript Program to Extract Given Property Values from Objects as Array

To understand this example, you should have the knowledge of the following JavaScript programming topics:

Example 1: Extract Value Using map()

Output

[1, 4, 8]

In the above program, the property's value of key a is extracted from each object of an array.

The map() method is used to iterate through all the elements of an array and extract property values of key a.

Note: You could also use a regular function instead of an arrow function.

let extractedValue = arr.map(function(item) {return item[prop]});

Output

[1, 4, 8]

In the above program, the property value of key a is extracted from each object of an array.

Initially, the extractedValue array is empty.
The for loop is used to iterate through all the elements of an array.
During each iteration, the value of property a is pushed to the extractedValue array.

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