Intersection of two arrays in Python ( Lambda expression and filter function )

Map function and Lambda expression in Python to replace characters

Given a string S, c1 and c2. Replace character c1 with c2 and c2 with c1. Examples: Input : str = 'grrksfoegrrks' c1 = e, c2 = r Output : geeksforgeeks Input : str = 'ratul' c1 = t, c2 = h Output : rahul We have an existing solution for this problem in C++. Please refer to Replace a character c1 with c2 and c2 with c1 in a string S. We can solve th

2 min read

Python | Find the Number Occurring Odd Number of Times using Lambda expression and reduce function

Given an array of positive integers. All numbers occur even number of times except one number which occurs odd number of times. Find the number in O(n) time & constant space. Examples: Input : [1, 2, 3, 2, 3, 1, 3] Output : 3 We have existing solution for this problem please refer Find the Number Occurring Odd Number of Times link. we will solv

1 min read

Lambda and filter in Python Examples

Prerequisite : Lambda in Python Given a list of numbers, find all numbers divisible by 13. Input : my_list = [12, 65, 54, 39, 102, 339, 221, 50, 70] Output : [65, 39, 221] We can use Lambda function inside the filter() built-in function to find all the numbers divisible by 13 in the list. In Python, anonymous function means that a function is witho

2 min read

Lambda expression in Python to rearrange positive and negative numbers

Given an array of positive and negative numbers, arrange them such that all negative integers appear before all the positive integers in the array. The order of appearance should be maintained. Examples: Input : arr[] = [12, 11, -13, -5, 6, -7, 5, -3, -6] Output : arr[] = [-13, -5, -7, -3, -6, 12, 11, 6, 5]\Input : arr[] = [-12, 11, 0, -5, 6, -7, 5

2 min read

Check if a String Contains Only Alphabets in Java Using Lambda Expression

Lambda expressions basically express instances of functional interfaces (An interface with a single abstract method is called functional interface. An example is java.lang.Runnable). lambda expressions implement the only abstract function and therefore implement functional interfaces. Given a String, we just need to iterate over characters again th

3 min read

Find Union and Intersection of two unsorted arrays

Given two unsorted arrays that represent two sets (elements in every array are distinct), find the union and intersection of two arrays. Example: arr1[] = {7, 1, 5, 2, 3, 6} arr2[] = {3, 8, 6, 20, 7} Then your program should print Union as {1, 2, 3, 5, 6, 7, 8, 20} and Intersection as {3, 6, 7}. Note that the elements of union and intersection can

15+ min read

Union and Intersection of two sorted arrays

Given two sorted arrays, find their union and intersection. Example: Input: arr1[] = {1, 3, 4, 5, 7} arr2[] = {2, 3, 5, 6} Output: Union : {1, 2, 3, 4, 5, 6, 7} Intersection : {3, 5} Input: arr1[] = {2, 5, 6} arr2[] = {4, 6, 8, 10} Output: Union : {2, 4, 5, 6, 8, 10} Intersection : {6} Union of Two-Sorted Arrays using SetsThe idea of the approach i

15+ min read

Python - Lambda function to find the smaller value between two elements

The lambda function is an anonymous function. It can have any number of arguments but it can only have one expression. Syntax lambda arguments : expression In this article, we will learn how to find the smaller value between two elements using the Lambda function. Example: Input : 2 5 Output : 2 Input : 7 5 Output : 5Method 1: Using lambda and min(

2 min read

Spatial Filters - Averaging filter and Median filter in Image Processing

Spatial Filtering technique is used directly on pixels of an image. Mask is usually considered to be added in size so that it has a specific center pixel. This mask is moved on the image such that the center of the mask traverses all image pixels.In this article, we are going to cover the following topics - To write a program in Python to implement

3 min read

Building Expression tree from Prefix Expression

Given a character array a[] represents a prefix expression. The task is to build an Expression Tree for the expression and then print the infix and postfix expression of the built tree. Examples: Input: a[] = "*+ab-cd" Output: The Infix expression is: a + b * c - d The Postfix expression is: a b + c d - *Input: a[] = "+ab" Output: The Infix express

8 min read

Intersection of two arrays in Python ( Lambda expression and filter function )

Python3

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Intersection of two arrays in Python ( Lambda expression and filter function )

Python3

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