Programming Articles - Page 1325 of 3366

When it is required to create a Python program that generates a linked list, a 'Node' class needs to be created. To display the data elements in the circular list, another method can be defined, that would display the data. In this class, there are two attributes, the data that is present in the node, and the access to the next node of the linked list. In a circular linked list, the head and the rear are adjacent to each other. They are connected to form a circle, and don't have 'NULL' value in the last node.Another 'linked_list' class needs ... Read More

When it is required to sort the list of tuples in a specific order, the 'sorted' method can be used.The 'sorted' method is used to sort the elements of a list.A list can be used to store heterogeneous values (i.e data of any data type like integer, floating point, strings, and so on). A list of tuple basically contains tuples enclosed in a list.Below is a demonstration for the same −ExampleLive Demodef tuple_sort(my_tup):    return(sorted(my_tup, key = lambda x: x[1])) my_tuple = [('Mahe', 11), ('Aisha', 33), ('Will', 50), ('Root', 65)] print("The list of tuple is : ") print(my_tuple) ... Read More

When it is required to remove a tuple from a list of tuples based on a given condition, i.e the tuple doesn't contain a specific character, the list comprehension can be used.A list can be used to store heterogeneous values (i.e data of any data type like integer, floating point, strings, and so on). A list of tuple basically contains tuples enclosed in a list.The list comprehension is a shorthand to iterate through the list and perform operations on it.Below is a demonstration for the same −ExampleLive Demomy_list = [('. ', 62), ('Mark', 5),    ('Paul.', 21), ('.....', 0),   ... Read More

When it is required to remove tuples from a list of tuples if it is greater than a value 'n', the lambda function can be used.Anonymous function is a function which is defined without a name. In general, functions in Python are defined using 'def' keyword, but anonymous function is defined with the help of 'lambda' keyword.It takes a single expression, but can take any number of arguments. It uses the expression and returns the result of it.Below is a demonstration for the same −ExampleLive Demomy_tuple = [('a', 130), ('b', 230), ('c', 25), ('z', 654), ('f', 69)] print("The list ... Read More

When it is required to update a list of tuple using another list, the 'defaultdict' can be used.Defaultdict is a container similar to dictionaries which is present in 'collections' module. It is a sub-class of the 'dict' class. It returns a dictionary-like object. The 'defaultdict' doesn't raise a KeyError ever. It provides a default value for the key which doesn't exist.Below is a demonstration for the same −ExampleLive Demofrom collections import defaultdict def merge_vals(list_1, list_2):    my_dict = defaultdict(list)    for i, j in list_1 + list_2:       my_dict[i].append(j)        return sorted([(i, max(j)) for i, j ... Read More

When it is required to find the selective value in a list of tuples, the 'dict' method, the 'get' method and the list comprehension can be used.The list comprehension is a shorthand to iterate through the list and perform operations on it. A list can be used to store heterogeneous values (i.e data of any data type like integer, floating point, strings, and so on).A list of tuple basically contains tuples enclosed in a list.The 'dict' method creates a dictionary. It contains key value pairs, which are unordered, and indexed.The 'get' method returns the value of a specific key when ... Read More

When it is required to split the tuple into 'n' groups, the list comprehension can be used. A tuple is an immutable data type. It means, values once defined can't be changed by accessing their index elements. If we try to change the elements, it results in an error. They are important contains since they ensure read-only access.The list comprehension is a shorthand to iterate through the list and perform operations on it.Below is a demonstration for the same −ExampleLive Demomy_tuple = (12, 34, 32, 41, 56, 78, 9, 0, 87, 53, 12, 45, 12, 6) print ("The tuple ... Read More

When it is required to modify the list of tuple, the 'zip' method and the list comprehension can be used.The zip method takes iterables, aggregates them into a tuple, and returns it as the result.The list comprehension is a shorthand to iterate through the list and perform operations on it.A list can be used to store heterogeneous values (i.e data of any data type like integer, floating point, strings, and so on). A list of tuple basically contains tuples enclosed in a list.Below is a demonstration for the same −ExampleLive Demomy_list_1 = [('Hi', 1), ('there', 2), ('Jane', 3)] my_list_2 = ... Read More

When it is required to remove tuples that have a duplicate first value from a given set of list of tuples, a simple 'for' loop, and the 'add' and 'append' methods can be used.Below is a demonstration for the same −ExampleLive Demomy_input = [(45.324, 'Hi Jane, how are you'), (34252.85832, 'Hope you are good'), (45.324, 'You are the best.')] visited_data = set() my_output_list = [] for a, b in my_input:    if not a in visited_data:       visited_data.add(a)       my_output_list.append((a, b)) print("The list of tuple is : ") print(my_input) print("The list of tuple after ... Read More

In PHP 7, Group Use declaration is more readable and can be used to import classes, constants, and functions easily from the same namespace.Group Use declaration is used to import multiple structures easily from a namespace and cuts a good level of volubility in most cases. It is also useful to identify the multiple imported entities which belong to the same module.Example 1The following example shows the code before PHP 7 −Example 2The following example shows the code for PHP7 or PHP 7+use com\India\{ClassX, ClassY, ClassZ as Z}; use function com\India\{fn_x, fn_y, fn_z}; use const com\India\{ConstX, ConstY, ConstZ};ExplanationIn Example 1, ... Read More