What does lastIndexOf do in JS?

The lastIndexOf() method returns the index (position) of the last occurrence of a specified value in a string. The lastIndexOf() method searches the string from the end to the beginning. The lastIndexOf() method returns the index from the beginning (position 0).

What is indexOf and lastIndexOf?

indexOf() method returns the position of the first occurrence of a specified value in a string. string. lastIndexOf() method returns the position of the last occurrence of a specified value in a string.

What is output of the function lastIndexOf ()?

lastIndexOf() method finds the index of the last occurrence of the argument string in the given string. The value returned is 0-based.

How do I find the last index?

prototype. lastIndexOf() The lastIndexOf() method returns the last index at which a given element can be found in the array, or -1 if it is not present.

What is slice JavaScript?

JavaScript Array slice() The slice() method returns selected elements in an array, as a new array. The slice() method selects from a given start, up to a (not inclusive) given end. The slice() method does not change the original array.

What is charAt in Java?

The charAt() method returns the character at the specified index in a string. The index of the first character is 0, the second character is 1, and so on.

How do I print the last index of an ArrayList?

Get the last element of ArrayList with use of get(index) method by passing index = size – 1.

What is the use of Slice?

Definition and Usage The slice() function returns a slice object. A slice object is used to specify how to slice a sequence. You can specify where to start the slicing, and where to end. You can also specify the step, which allows you to e.g. slice only every other item.

What is the difference between splice and slice in JavaScript?

Splice and Slice both are Javascript Array functions. The splice() method returns the removed item(s) in an array and slice() method returns the selected element(s) in an array, as a new array object. The splice() method changes the original array and slice() method doesn’t change the original array.

How do I remove a specific character from a string?

Using ‘str. replace() , we can replace a specific character. If we want to remove that specific character, replace that character with an empty string. The str. replace() method will replace all occurrences of the specific character mentioned.

How can I remove last 5 characters from a string in Java?

There are four ways to remove the last character from a string:

1. Using StringBuffer. deleteCahrAt() Class.
2. Using String. substring() Method.
3. Using StringUtils. chop() Method.
4. Using Regular Expression.

What is use of charAt method?

Is charAt a built in function?

Conclusion. The method charAt() in java can be defined as the inbuilt method that returns the character value at the stated index number when searched in a string.

How do I print an ArrayList?

These are the top three ways to print an ArrayList in Java:

1. Using a for loop.
2. Using a println command.
3. Using the toString() implementation.

How do I print a specific element in an ArrayList?

PRINTING ARRAYLIST

1. 1) Using for loop. //using for loop System.out.println(“Using For Loop\n “); for (int i = 0; i < arrlist.size();i++) { System.out.println(arrlist.get(i)); }
2. 2) Using for-each loop.
3. 3) Using iterator.
4. 4) Using list-iterator.

What is JS slice?

How does slice work JS?

slice() The slice() method returns a shallow copy of a portion of an array into a new array object selected from start to end ( end not included) where start and end represent the index of items in that array. The original array will not be modified.

Does splice return array?

The splice() method returns the removed items in an array.

Does slice mutate JavaScript?

slice does not alter the original array. It returns a shallow copy of elements from the original array.

How to use indexOf in JavaScript?

JavaScript – How to Use the indexOf method in JavaScript The indexOf() method is a part of the Array prototype and the String prototype, and therefore it applies to objects of both types. The method returns the first index at which a given element can be found in the Array or String, or -1 if the element being searched for was not found.

How to replace substring in JavaScript?

Introduction.

replace () The simplest way to do this is to use the built-in replace () function.

replaceAll () As of August 2020,as defined by the ECMAScript 2021 specification,we can use the replaceAll () function to replace all instances of a string.

What is indexOf method in JavaScript?

– let str = ‘jscurious.com’; – console.log (str.indexOf (‘cur’)); // 2 – console.log (str.indexOf (‘com’)); // 10 – console.log (str.indexOf (‘s’)); // 1 – console.log (str.indexOf (‘xyz’)); // -1

How to find the substring in JavaScript?

Optional. Zero-based index before which to end extraction of the substring.

If negative number is provided then it will treated as stringLength+endIndex where stringLength is the length of the string. Like stringLength+(-3).

If endIndex is not provided the substring till the end of the string is returned.