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The lambda expressions can't be executed on their own. It is used to implement methods that have declared in a functional interface. We need to follow a few rules in order to use the exception handling mechanism in a lambda expression.Rules for Lambda ExpressionA lambda expression cannot throw any checked exception until its corresponding functional interface declares a throws clause.An exception thrown by any lambda expression can be of the same type or sub-type of the exception declared in the throws clause of its functional interface.Example-1interface ThrowException { void throwing(String message); } public class LambdaExceptionTest1 { ... Read More
In this article, we will learn about the solution to the problem statement given below.Problem statement − We are given a string we need to display all the possible permutations of the string.Now let’s observe the solution in the implementation below −Example Live Demo# conversion def toString(List): return ''.join(List) # permutations def permute(a, l, r): if l == r: print (toString(a)) else: for i in range(l, r + 1): a[l], a[i] = a[i], a[l] permute(a, l + 1, r) a[l], ... Read More
In this article, we will learn about the solution to the problem statement given below.Problem statement − We are given two strings, we need to get the uncommon words from the given strings.Now let’s observe the solution in the implementation below −Example Live Demo# uncommon words def find(A, B): # count count = {} # insert in A for word in A.split(): count[word] = count.get(word, 0) + 1 # insert in B for word in B.split(): count[word] = count.get(word, 0) + 1 # return ans return [word ... Read More
In this article, we will learn about the solution to the problem statement given below.Problem statement − We are given a function, we need to display the number of local variables in the function.Now let’s observe the solution in the implementation below −Example Live Demo# checking locals def scope(): a = 25.5 b = 5 str_ = 'Tutorialspoint' # main print("Number of local varibales available:", scope.__code__.co_nlocals)OutputNumber of local varibales available: 3Example Live Demo# checking locals def empty(): pass def scope(): a, b, c = 9, 23.4, True str = 'Tutiorialspoint' # main print("Number of local varibales ... Read More
In this article, we will learn about the solution to the problem statement given below.Problem statement − We are given an integer n, we need to count the number of trailing zeros in the factorial.Now let’s observe the solution in the implementation below −Example Live Demo# trailing zero def find(n): # Initialize count count = 0 # update Count i = 5 while (n / i>= 1): count += int(n / i) i *= 5 return int(count) # Driver program n = 79 print("Count of trailing 0s "+"in", n, ... Read More
In this article, we will learn about the solution to the problem statement given below.Problem statement − We are given an integer n, we need to count the number of 1’s in the binary representation of the numberNow let’s observe the solution in the implementation below −#naive approachExample Live Demo# count the bits def count(n): count = 0 while (n): count += n & 1 n >>= 1 return count # main n = 15 print("The number of bits :", count(n))OutputThe number of bits : 4#recursive approachExample Live Demo# recursive way def count( ... Read More
In this article, we will learn about the solution to the problem statement given below.Problem statement − We are given a positive integer N, we need to count all possible distinct binary strings available with length N such that no consecutive 1’s exist in the string.Now let’s observe the solution in the implementation below −Example Live Demo# count the number of strings def countStrings(n): a=[0 for i in range(n)] b=[0 for i in range(n)] a[0] = b[0] = 1 for i in range(1, n): a[i] = a[i-1] + b[i-1] b[i] = ... Read More
As a part of text analytics, we frequently need to count words and assign weightage to them for processing in various algorithms, so in this article we will see how we can find the frequency of each word in a given sentence. We can do it with three approaches as shown below.Using CounterWe can use the Counter() from collections module to get the frequency of the words. Here we first apply the split() to generate the words from the line and then apply the most_common ().Example Live Demofrom collections import Counter line_text = "Learn and practice and learn to practice" freq ... Read More
In this article, we will learn about the solution to the problem statement given below.Problem statement − We are given a list, we need to count the inversion required and display it.Inversion count is obtained by counting how many steps are needed for the array to be sorted.Now let’s observe the solution in the implementation below −Example Live Demo# count def InvCount(arr, n): inv_count = 0 for i in range(n): for j in range(i + 1, n): if (arr[i] > arr[j]): inv_count += 1 return ... Read More
In this article, we will learn about the solution to the problem statement given below.Problem statement − We are given a number X which represents the floor of a matchstick pyramid, we need to display the total number of matchstick required to form a pyramid of matchsticks with x floors.Now let’s observe the solution in the implementation below −Example Live Demo#function def numberOfSticks(x): return (3 * x * (x + 1)) / 2 # main() n=21 a=numberOfSticks(n) print(int(a))Output693All the variables are declared in the local scope and their references are seen in the figure above.ConclusionIn this article, we have learned ... Read More