8 Ways to Iterate over an Array in JavaScript
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8 Ways to Iterate over an Array in JavaScript
Do you know all of these?
An array is a data structure consisting of a collection of elements (values or variables), each identified by at least one array index or key.
Let’s look into the different ways in which we can iterate over an array:
For Loop
A for loop is a control flow statement for specifying iteration that allows code to be executed repeatedly.
While Loop
A while loop is a control flow statement that allows code to be executed repeatedly based on a given Boolean condition. The while loop can be thought of as a repeating if statement.
ForEach Loop
The forEach loop is used to iterate over the elements of the collection. The collection may be an array or a list.
Every()
The every() method executes a function for each array element. The every() method returns true if the function returns true for all elements.
Some()
The some() method tests whether at least one element in the array passes the test implemented by the provided function
Filter()
The filter() method creates a new array filled with elements that pass a test provided by a function. The filter() method does not execute the function for empty elements. The filter() method does not change the original array.
Map()
Map is a collection of key/value pairs. Map keys and values can be of any type (arrays, objects, numbers, and other primitive data types). Map iterates its elements in insertion order. Before the introduction of map, you would have to use an object.
Reduce()
The reduce() method executes a reducer function for array element. The reduce() method returns a single value: the function’s accumulated result. The reduce() method does not execute the function for empty array elements.
Wrapping It Up!
Congratulations on reaching this far! You’re a fantastic reader!!
These are some of the best methods to iterate over an array in javascript. You can dig deeper to find out all the possible ways for iterating an array in JavaScript.
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