This post will discuss the removeAll() method of the ArrayList class in Java. removeAll() method removes all of the elements in the specified collection. We can remove only one element from the list using the remove() method. Method declaration – public boolean removeAll(Collection c) What does it do? It will remove all elements present in […]
ArrayList removeAll() method in Java Read More »
The remove() method of the ArrayList class helps remove the specified element or element present at a specified index. There are two overloaded implementations of the remove() method. public E remove(int index) public boolean remove(Object o) Let’s have a look at these methods one by one. public E remove(int index) What does it do? It
ArrayList remove() method in Java Read More »
The lastIndexOf() method helps find the last occurrence of a specified element within the ArrayList. This post will discuss the lastIndexOf() of the ArrayList class in detail. We also have an indexOf() method in the ArrayList class, which is used to find the first occurrence of an element. Method declaration – public int lastIndexOf(Object o)
ArrayList lastIndexOf() method in Java Read More »
The isEmpty() method is used to determine whether an ArrayList is empty or not. In this post, we will look at the isEmpty() method of the ArrayList class in detail. Method declaration – public boolean isEmpty() What does it do? It will check whether the Arraylist contains any elements or not. What does it return?
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indexOf() method helps return the index of the first occurrence of the specified element. In this post, we are going to discuss the indexOf() method of the ArrayList class in detail. Method declaration – public int indexOf(Object o) What does it do? It will return the index of the first occurrence of the specified element.
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The ensureCapacity() method is used to increase the capacity of an ArrayList to a specified value. In this post, we will look at the ensureCapacity() method of the ArrayList class in detail. ArrayList internally uses an array to store the elements, and that array size is what we call the capacity of the ArrayList. So,
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These methods help us to replace the old string with the new string and in this post, we are going to look at the Replace() and ReplaceAll() methods of the strings package in detail. strings.Replace() method Method declaration – func Replace(s, old, new string, n int) string What does it do? It will make a
strings.Replace() and strings.ReplaceAll() methods in Golang Read More »
After adding some key-value pairs, we may want to delete or remove a key from the map. Go language provides us with the built-in delete function which helps us to delete or remove a key from the map. Syntax for the delete function delete function accepts two parameters – one will be the map itself
How to delete or remove a key from a map in Golang? Read More »
In this post, we are going to look at the various ways of iterating over a map. Iterating over key-value pairs Iterating over keys only of a map Iterating over values only Iterating in an orderly fashion Let’s see all of the above points one by one. Iterating over key-value pairs We can easily iterate
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A map in Go language is a built-in data structure that is used to store the key-value pairs. It is mostly used for fast lookups or retrieval of the data using a key inside the map. A key in the map can be of any type (as long as values of that type can be
Introduction to Maps in Golang Read More »