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Let’s say we have a python dictionary which has lists as it values in the key value pairs. We need to create a list which will represent all possible combinations of the keys and values from the given lists.With sorted and productThe product function from itertools can be used to create a crtesian product of the iterable supplied to it as parameter. We sort the dictionary and use two for loops to create the combination of all possible key value pairs from the lists in the dictionary.Example Live Demoimport itertools as it Adict = { "Day": ["Tue", "Wed"], "Time": ... Read More
Lists are one of the most extensively used python data structures. In this article we will see how to combine the elements of two lists and produce the final output in a sorted manner.With + and sortedThe + operator can join the elements of two lists into one. Then we apply the sorted function which will sort the elements of the final list created with this combination.Example Live DemolistA = ['Mon', 'Tue', 'Fri'] listB = ['Thu', 'Fri', 'Sat'] # Given lists print("Given list A is : ", listA) print("Given list B is : ", listB) # Add and sort res = ... Read More
For data analysis, we sometimes take a combination of data structures available in python. A list can contain tuples as its elements. In this article we will see how we can combine each element of a tuple with another given element and produce a list tuple combination.With for loopIn the below approach we create for loops that will create a pair of elements by taking each element of the tuple and looping through the element in the list.Example Live DemoAlist = [([2, 8, 9], 'Mon'), ([7, 5, 6], 'Wed')] # Given list of tuple print("List of tuples : ", Alist) # ... Read More
The sum of two sides of a triangle is always greater than the third side. This is called triangle inequality. Python list of lists we will identify those sublists where the triangle inequality holds good.With for and >We will first get all the sublists sorted. Then for each sublist we will check if the if the sum of first two elements is greater than the third element.Example Live DemoAlist = [[3, 8, 3], [9, 8, 6]] # Sorting sublist of list of list for x in Alist: x.sort() # Check for triangular inequality for e in Alist: if e[0] ... Read More
Sometimes in a given Python list we may be interested only in the first digit of each element in the list. In this article we will check if the first digit of all the elements in a list are same or not.With set and mapSet in Python does not allow any duplicate values in it. So we take the first digit of every element and put it in a set. If all the digits are same then the length of the set will be only 1 has no duplicates allowed.Example Live DemoAlist = [63, 652, 611, 60] # Given list print("Given ... Read More
JSON is a type of text format use to exchange data easily between various computer programs. It has a specific format which Python can validate. In this article we will consider a string and using JSON module we will validate if the string represents a valid JSON format or not.Creating JSON ObjectThe json module has method called loads. It loads a valid json string to create a Json object. In this example we load the string and check that there is no error in loading the JSON object. If there is error we consider the JSON string as invalid.Example Live Demoimport ... Read More
The Bitwise NOT (~) Operator performs NOT operation on the bits. You can try to run the following code to learn how to work with JavaScript Bitwise NOT Operator.Example document.write("Bitwise NOT Operator"); // 7 = 00000000000000000000000000000111 document.write(~7);
If one of the bits are 1, then 1 is returned when Bitwise OR (|) operator is used.ExampleYou can try to run the following code to learn how to work with JavaScript Bitwise OR Operator. document.write("Bitwise OR Operator"); // 7 = 00000000000000000000000000000111 // 1 = 00000000000000000000000000000001 document.write(7 | 1);
To get the value of the type attribute of a link in JavaScript, use the type property. The type attribute is used to tell that the document is html (text/html) or css (text/css), etc.ExampleYou can try to run the following code to get the value of the type attribute of a link.Live Demo Qries var myVal = document.getElementById("anchorid").type; document.write("Value of type attribute: "+myVal);
Yes, it is a good practice to place all the JavaScript declarations at the top. Let’s see an example −Example JavaScript String match() Method // all the variables declared at top var str, re, found; str = "For more information, see Chapter 3.4.5.1"; re = /(chapter \d+(\.\d)*)/i; found = str.match( re ); document.write(found ); The following are the valid reasons −Gives a single place to check for all the variables.Helps in avoiding global variablesRe-declarations are avoided.The code is easy to read for others as well.