Can we assign array to object in javascript?
You could use an accumulator aka Show
Pass an empty object If your array is a set of key-value pair objects:
will produce: For the sake of completeness,
will produce: Your accumulator can be of any type for you specific purpose. For example in order to swap the key and value of your object in an array, pass
will produce: Unlike
will produce: Caution: See a default implementation by Mozilla. Convert an Array to Object using JavaScript #Use the
We passed the following 2 parameters to the Object.assign method:
The method returns an object where the keys are the array indexes and the values are the array elements. Convert an Array to Object using forEach() #To convert an array to an object:
The function we passed to the Array.forEach method gets called with each element in the array. The method also gives us access to the index of the current iteration. This approach is a bit more manual, however it allows you to name the keys of the new object. Convert an Array to Object using Spread #Use the spread syntax (...) to convert an array to an object, e.g.
We used the spread syntax (...) to unpack the array elements into an object. The (...) syntax can be used with any iterable, such as an array, string, Similarly to the first approach, the indexes of the array become the object's keys and the elements become the object's values. Convert an Array to Object using reduce #To convert an array to an object, use the
The function we passed to the Array.reduce method gets called with each element in the array. We set an empty object as the initial value for the On each iteration, we assign a new key-value pair to the object and return the value for the This approach also allows you to assign any key name that
your use case requires. We used the string Convert an Array to Object using Object.fromEntries #To convert an array of key-value pairs to an object, pass the array to the
Notice that we have a two-dimensional array this time. The nested arrays contain 2 elements each - a key and a value. The Object.fromEntries method takes an iterable such as an array or a Conclusion #There are multiple ways to convert an array to an object:
Further Reading #
Can we assign array to object?You can convert an array into an object using one of these three methods: The Object. assign() function. Loop over the array and construct a new object.
How do you assign an array value to an object?To convert an array to an object, use the reduce() method to iterate over the array, passing it an object as the initial value. On each iteration, assign a new key-value pair to the accumulated object and return the result. Copied! const arr = ['zero', 'one', 'two']; const obj4 = arr.
How do you declare array of objects in JavaScript?To initialize an array of objects, use the Array() constructor to create an array filled with N empty elements and use a for loop to iterate over the array assigning each element to an object. Copied! const arr2 = new Array(2); for (let i = 0; i < arr2.
How do you map an array to an object?To convert an array of objects to a Map , call the map() method on the array and on each iteration return an array containing the key and value. Then pass the array of key-value pairs to the Map() constructor to create the Map object.
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