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In Python, a list is a mutable data type used to store a collection of items, which are separated by commas and enclosed within square brackets [ ]. According to the Python documentation, there is no concept of a homogeneous list in Python. However, a Python list can contain collections of homogeneous items, meaning that the data types of the items are the same. Python List of Homogeneous Data A Python list can contain both homogeneous and heterogeneous data. Example Here is an example of a list containing homogeneous data - # List containing ... Read More
In Java, org.simple.json and org.json are two libraries that help in reading, writing, and manipulating JSON. But still, they are different. In this article, we are going to learn about these differences. Difference between JSON.simple vs JSON Let's see the below differences and they are - Features JSON.simple JSON ... Read More
In Java, Jackson is a library that is used to convert JSON to Java objects and vice versa. Jackson Annotations are used during serialization and deserialization to denote a particular field that is declared in Java as an instance variable, is a JsonProperty, and should be ignored. We can also use annotations with methods. So, basically, Annotations make JSON output clearer as we required. In this Article, we will learn about one of its annotations is @JsonRawValue Annotation. @JsonRawValue This annotation can be used for methods and fields. The @JsonRawValue annotation is used to serialize methods or fields as it ... Read More
In Java, Jackson is a library that is used to convert JSON to Java objects and vice versa. Jackson Annotations are used during serialization and deserialization. We use annotations with a particular field or method that is declared in Java. So, Annotations make the JSON output clearer as we required. In this Article, we will learn about one of its annotations @JsonRootName. @JsonRootName Annotatation The @JsonRootName annotation is a Jackson annotation that is used on a class if we want to do wrapping in our JSON attributes. It is a class-level annotation. It wraps the object to be serialized with a ... Read More
In this article, we are going to learn how to replace the last occurrence of an expression in a string. In Python, String manipulation is a common task, and Python provides the built-in method named replace(). Though we can replace the specified character or substring in a string using this method, it does not directly support replacing the last occurrence. To achieve this we need to use slicing or a regular expression. Using Python rfind() Method The first approach is by using the Python rfind() method searches for the starting index of the last occurrence of the specified substring. Here, we ... Read More
A copy constructor is a type of constructor that uses another object from the same class that has been created previously, to initialize an object, whereas the assignment operator is used to assign a value to a variable. In this article, we will understand the difference between the copy constructor and the assignment operator in C++. Copy Constructor A copy constructor creates a new object by copying an existing object of the same class which has been created previously. It is of two types, i.e., Default and User-defined copy constructor. In the default copy constructor, ... Read More
The is a header file that includes all the standard C++ library. It is used during coding contests, as it helps in saving time while solving the problem since programmers do not have to remember all the header files. In the software engineering approach, we should reduce the use of this header file, as it includes lots of files, and sometimes that may not be required in the program. So it may increase the compile time. In this article, we are going to discuss why we should not use the header file ... Read More
In this article, we are going to learn about converting a string to binary, which means representing each character in the string using the binary digits 0 and 1. A binary number is a number expressed in the base2 numerical system, which uses only two symbols - 0 and 1. Since computers store data as binary, converting the strings into binary helps to understand how data is stored or transmitted. Python provides several methods to achieve this. Using Python ord() and format() Functions The first approach is by using the Python ord() and format(), Where the Python ord() ... Read More
Sorting the string that contains the number, such as ("xy1", "xy2", "xy10"), can be complex in Python. For example, if we sort the list ["xy1", "xy2", "xy10"] using the built-in sort() method, it results in ["xy1", "xy10", "xy2"]. But we will expect "xy2" to come before "xy10". It is because the Python default sorting uses the lexicographical order and compares the characters from left to right based on their Unicode values. Since the character '1' in "xy10" comes before "2" in "xy2", the "xy10" is treated as smaller, even though the number 10 is greater than 2. This ... Read More
In Python, we will come across situations where we encounter long lines of code that exceed the recommended line length of 79 characters (suggested by the Python style guide). To improve code readability, Python provides several ways to wrap long lines. In this article, we will explore the various methods to wrap long lines in Python. Using Backslash(\) The Backslash(\) is used as the line continuation character in Python. It indicates the compiler that the statement continues on the next line. If we try to place anything (word, space or comment) after the backslash, it will result in ... Read More