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Solution..The linecache module implements cache which holds the contents of files, parsed into separate lines, in memory. linecache module returns line/s by indexing into a list, and saves time over repeatedly reading the file and parsing lines to find the one desired.lincecache module is very useful when looking for multiple lines from the same file.Prepare test data. You can get this text by just using Google and searching for sample text.Lorem ipsum dolor sit amet, causae apeirian ea his, duo cu congue prodesset. Ut epicuri invenire duo, novum ridens eu has, in natum meliore noluisse sea. Has ei stet explicari. ... Read More
Problem.You need to compare files in Python.Solution..The filecmp module in python can be used to compare files and directories. 1.cmp(file1, file2[, shallow])filecmp Compares the files file1 and file2 and returns True if identical, False if not. By default, files that have identical attributes as returned by os.stat() are considered to be equal. If shallow is not provided (or is True), files that have the same stat signature are considered equal.cmpfiles(dir1, dir2, common[, shallow])Compares the contents of the files contained in the list common in the two directories dir1 and dir2. cmpfiles returns a tuple containing three lists - match, mismatch, ... Read More
IntroductionIn a real world corporate business setting, most data may not be stored in text or Excel files. SQL-based relational databases such as Oracle, SQL Server, PostgreSQL, and MySQL are in wide use, and many alternative databases have become quite popular.The choice of database is usually dependent on the performance, data integrity, and scalability needs of an application.How to do it..In this example we will how to create a sqlite3 database. sqllite is installed by default with python installation and doesn't require any further installations. If you are unsure please try below. We will also import Pandas.Loading data from SQL ... Read More
Let’s say the following is our string. Some text is surrounded by special character hash(#) −var values = "My Name is #yourName# and I got #marks# in JavaScript subject";We need to replace the special character with valid values. For this, use replace() along with shift().ExampleFollowing is the code −var values = "My Name is #yourName# and I got #marks# in JavaScript subject"; const originalValue = ["David Miller", 97]; var result = values.replace(/#([^#]+)#/g, _ => originalValue.shift()); console.log(result);To run the above program, you need to use the following command −node fileName.js. Here, my file name is demo298.js.OutputThis will produce the following output ... Read More
Suppose we have two strings S and T, we have to find all the start indices of S's anagrams in T. The strings consist of lowercase letters only and the length of both strings S and T will not be larger than 20 and 100.So, if the input is like S = "cab" T = "bcabxabc", then the output will be [0, 1, 5, ], as the substrings "bca", "cab" and "abc".To solve this, we will follow these steps:Define a map m, n := size of s, set left := 0, right := 0, counter := size of pdefine an ... Read More
To implement this, extract id from attr() and use replace() to replace the id attribute.ExampleFollowing is the code − Document $('[id*="-"]').each(function () { console.log('Previous Id attribute: ' + $(this).attr('id')); $(this).attr('id', $(this).attr('id').replace('-', '----')); console.log('Now Id Attribute: ' + $(this).attr('id')); }); To run the above program, save the file name “anyName.html(index.html)”. Right click on the file and select the option “Open with Live Server” in VS Code editor.OutputThis will produce the following output −Following is the value on console −
IntroductionOne of the most basic and common operations to perform during data analysis is to select rows containing the largest value of some columns within a group. In this post, I will show you how to find the largest of each group within a DataFrame.Problem..Let us understand the task first, assume you are given a movies dataset and requested to list the most popular film of each year based on popularity.How to do it..1.Preparing the data.Well Google is full of datasets. I often use kaggle.com to get the datasets I need for my data analysis. Feel free to login to ... Read More
For this, use document.getElementById(“”) along with addEventListener().ExampleFollowing is the code − Live Demo Document FirstName: LastName: const formDetails = document.getElementById("details"); formDetails.addEventListener("submit", async (ev) => { ev.preventDefault(); var fName = document.getElementById("firstName").value; var lName = document.getElementById("lastName").value; console.log("First Name=" + ... Read More
Suppose we have two singly linked list L1 and L2, each representing a number with least significant digits first, we have to find the summed linked list.So, if the input is like L1 = [5, 6, 4] L2 = [2, 4, 8], then the output will be [7, 0, 3, 1, ]To solve this, we will follow these steps:carry := 0res := a new node with value 0curr := reswhile L1 is not empty or L2 is not empty or carry is non-zero, dol0_val := value of L1 if L1 is not empty otherwise 0l1_val := value of L2 if ... Read More
IntroductionOne of the basic limitation of unpacking is that you must know the length of the sequences you are unpacking in advance.How to do it..random_numbers = [0, 1, 5, 9, 17, 12, 7, 10, 3, 2] random_numbers_descending = sorted(random_numbers, reverse=True) print(f"Output *** {random_numbers_descending}")Output*** [17, 12, 10, 9, 7, 5, 3, 2, 1, 0]If I now wanted to find out the largest and second largest from the numbers, we will get an exception "too many values to unpack".print(f"Output *** Getting the largest and second largest") largest, second_largest = random_numbers_descendingOutput*** Getting the largest and second largest--------------------------------------------------------------------------- ValueError Traceback (most recent call last) ... Read More