Array/String Methods
These methods cover a wide range of operations you can perform on arrays and strings
- #Extra
Array Methods
- map: Executes a provided function once for each array element and creates a new array with the results.
- filter: Creates a new array containing elements that pass the specified condition.
- reduce: Reduces the array to a single value by applying a function to each element.
- reduceRight: Similar to
`reduce`, but processes the array from right to left. - push: Adds one or more elements to the end of an array and returns the new length.
- pop: Removes the last element from an array and returns that element.
- shift: Removes the first element from an array and returns that removed element.
- unshift: Adds one or more elements to the beginning of an array and returns the new length.
- splice: Adds or removes elements from an array at a specified index.
- slice: Returns a shallow copy of a portion of an array as a new array.
- concat: Joins two or more arrays and returns a new array.
- some: Checks if at least one element in the array satisfies a provided condition.
- every: Checks if all elements in the array satisfy a provided condition.
- fill: Fills elements of an array with a static value from a start index to an end index.
- reverse: Reverses the order of elements in an array.
- includes: Checks if an array contains a specific element.
- at: Returns the element at a specified index in the array.
- find: Returns the value of the first element in the array that satisfies a provided condition.
- forEach: Executes a provided function once for each array element.
- flat: Creates a new array with all sub-array elements concatenated into it recursively up to a specified depth.
- flatMap: Maps each element using a mapping function and flattens the result into a new array.
- indexOf: Returns the first index at which a specified element can be found in the array.
- findIndex: Returns the index of the first element in the array that satisfies a provided condition.
- lastIndexOf: Returns the last index at which a specified element can be found in the array.
- join: Joins all elements of an array into a string.
- sort: Sorts the elements of an array in place.
- toString: Returns a string representing the array and its elements.
- from: Creates a new array from an array-like or iterable object.
- entries: Returns a new array iterator object containing key/value pairs for each index in the array.
- isArray: Checks if a value is an array.
String Methods
- length: Returns the number of characters in a string.
- concat: Combines two or more strings and returns a new string.
- substring: Extracts a portion of a string based on start and end indexes.
- indexOf: Returns the index of the first occurrence of a specified substring within a string.
- replace: Replaces specified substrings within a string with new values.
- toUpperCase: Converts all characters in a string to uppercase.
- toLowerCase: Converts all characters in a string to lowercase.
- startsWith: Checks if a string starts with a specific substring.
- endsWith: Checks if a string ends with a specific substring.
- trim: Removes whitespace from the beginning and end of a string.
- split: Divides a string into an array of substrings based on a specified separator.
- charAt: Retrieves the character at a specific index within a string.
- charCodeAt: Returns the Unicode value of a character at a specified index.
- includes: Checks if a string contains a specific substring.
- match: Determines if a string matches a particular pattern using regular expressions.
- repeat: Repeats a string a specified number of times.
- lastIndexOf: Finds the index of the last occurrence of a specified substring within a string.
- slice: Extracts a portion of a string based on start and end indexes.
- isEmpty: Checks if a string is empty.
- isNaN: Determines if a string represents a valid number.
https://zuxcode.medium.com/20-javascript-string-methods-3ce70d1fb52