The Array.reduce() method is a powerful JavaScript function that processes each element of an array to reduce it to a single output value. It iterates through the array while accumulating a result based on the logic provided in a callback function. Syntax Parameters Parameter Description callback (Required) A function that executes on each element of…
The Array.reverse() method is a built-in JavaScript function that reverses the order of elements in an array. It modifies the original array so that the first element becomes the last, the second element becomes the second-to-last, and so on. Syntax Parameters The reverse() method does not take any parameters. Return Value The reverse() method returns…
The Array.toLocaleString() method is a built-in JavaScript function that converts the elements of an array into a localized string. This method is useful when working with date, number, or custom object data that should be represented in a locale-sensitive manner. Syntax Parameters Parameter Description locales (Optional) A string or array of strings that represents a…
The Array.filter() method is a powerful and widely used JavaScript function that creates a new array containing all the elements from the original array that satisfy a given condition. It does not modify the original array but returns a new one with the filtered elements. Syntax Parameters Parameter Description callback (Required) A function that tests…
The Array.with() method is a modern JavaScript feature introduced in ECMAScript 2023 (ES14). It creates a shallow copy of an array and replaces the element at a specified index with a new value, leaving the original array unchanged. This makes it a non-mutating alternative for modifying elements in an array. Syntax Parameters Parameter Description index…
The Array.values() method is a built-in JavaScript function that returns a new array iterator object. This iterator contains the values of each element in the array in their original order. Syntax Parameters The Array.values() method does not take any parameters. Return Value The method returns a new Array Iterator object containing the values of the…
The Array.unshift() method is a built-in JavaScript function that adds one or more elements to the beginning of an array and returns the new length of the array. This method is useful when you need to prepend elements to an array. Syntax Parameters Parameter Description element1, …, elementN (Required) The elements to be added to…
The Array.toString() method is a built-in JavaScript function that converts an array into a comma-separated string. It is a simple way to represent the contents of an array as a string, with each element of the array joined by a comma. Syntax Parameters The toString() method does not take any parameters. Return Value The method…
The Array.toSpliced() method is a new JavaScript function introduced in ECMAScript 2023 (ES14). It creates a shallow copy of an array with modifications specified by the provided parameters, without changing the original array. Syntax Parameters Parameter Description start (Required) The index at which to begin changing the array. Negative values count from the end of…
The Array.toSorted() method is a new addition to JavaScript, introduced in ECMAScript 2023 (ES14). It returns a new array with the elements sorted in the specified order, leaving the original array unchanged. Syntax Parameters Parameter Description compareFunction (Optional) A function that defines the sort order. If omitted, elements are converted to strings and sorted lexicographically…