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Twin primes are pairs of primes which differ by two. The first twin primes are {3,5}, {5,7}, {11,13} and {17,19}. You can generate prime twins in python by running a for loop and checking for primality of the numbers as you do so. exampledef is_prime(n): for i in range(2, n): if n % i == 0: return False return True def generate_twins(start, end): for i in range(start, end): j = i + 2 if(is_prime(i) and is_prime(j)): print("{:d} and {:d}".format(i, j)) generate_twins(2, 100)OutputThis will give the output −3 and 5 5 and 7 11 and 13 17 and 19 29 and 31 41 and 43 59 and 61 71 and 73
In this article we are going to discuss the set::equal_range() function in C++ STL, their syntax, working and their return values.What is Set in C++ STL?Sets in C++ STL are the containers which must have unique elements in a general order. Sets must have unique elements because the value of the element identifies the element. Once added a value in a set container later can’t be modified, although we can still remove or add the values to the set. Sets are used as binary search trees.What is set::equal_range()equal_range() function is an inbuilt function in C++ STL, which is defined in ... Read More
This is a language agnostic question. Loops are there in almost every language and the same principles apply everywhere. You need to realize that compilers do most heavy lifting when it comes to loop optimization, but you as a programmer also need to keep your loops optimized.It is important to realize that everything you put in a loop gets executed for every loop iteration. The key to optimizing loops is to minimize what they do. Even operations that appear to be very fast will take a long time if the repeated many times. Executing an operation that takes 1 microsecond ... Read More
You can access a dictionary value to a variable in Python using the access operator []. examplemy_dict = { 'foo': 42,'bar': 12.5 } new_var = my_dict['foo'] print(new_var)OutputThis will give the output −42You can also access the value using the get method on the dictionary. examplemy_dict = { 'foo': 42,'bar': 12.5 } new_var = my_dict.get('foo') print(new_var)OutputThis will give the output −42
In this article we are going to discuss the set::emplace_hint() function in C++ STL, their syntax, working and their return values.What is Set in C++ STL?Sets in C++ STL are the containers which must have unique elements in a general order. Sets must have unique elements because the value of the element identifies the element. Once added a value in set container later can’t be modified, although we can still remove or add the values to the set. Sets are used as binary search trees.What is set::emplace_hint()emplace_hint() function is an inbuilt function in C++ STL, which is defined in header ... Read More
You can put comments like you normally would anywhere in a python script. But note that you can only put single line comments using #. Multiline comments act like strings and you cannot put just a string in between definition of a dict. For example, the following declaration is perfectly valid −ExampletestItems = { 'TestOne': 'Hello', # 'TestTwo': None, }But the following is not −testItems = { 'TestOne': 'Hello', """ Some random multiline comment """ }
In this article we are going to discuss the set::cend() and set::cbegin() functions in C++ STL, their syntax, working and their return values.What is Set in C++ STL?Sets in C++ STL are the containers which must have unique elements in a general order. Sets must have unique elements because the value of the element identifies the element. Once added a value in set container later can’t be modified, although we can still remove or add the values to the set. Sets are used as binary search trees.What is set::cbegin():cbegin() function is an inbuilt function in C++ STL, which is defined ... Read More
This is a language agnostic question. Loops are there in almost every language and the same principles apply everywhere. You need to realize that compilers do most heavy lifting when it comes to loop optimization, but you as a programmer also need to keep your loops optimized.It is important to realize that everything you put in a loop gets executed for every loop iteration. They key to optimizing loops is to minimize what they do. Even operations that appear to be very fast will take a long time if the repeated many times. Executing an operation that takes 1 microsecond ... Read More
Given is the task to show the functionality list remove( ) and list remove_if( ) function in C++ in STL.What is List in STL?List are containers that allow constant time insertion and deletion anywhere in sequence. List are implemented as doubly linked lists. List allow non-contiguous memory allocation. List perform better insertion extraction and moving of element in any position in container than array, vector and deque. In List the direct access to the element is slow and list is similar to forward_list, but forward list objects are single linked lists and they can only be iterated forwards.What is remove( ... Read More
You can create a list of lambdas in a python loop using the following syntax −Syntaxdef square(x): return lambda : x*x listOfLambdas = [square(i) for i in [1,2,3,4,5]] for f in listOfLambdas: print f()OutputThis will give the output −1 4 9 16 25You can also achieve this using a functional programming construct called currying. examplelistOfLambdas = [lambda i=i: i*i for i in range(1, 6)] for f in listOfLambdas: print f()OutputThis will give the output −1 4 9 16 25