venkatsgithub1

GROKKING NOTES

I liked the way Grokking the coding interview organized problems into learnable patterns. However, the course is expensive and the majority of the time the problems are copy-pasted from leetcode. As the explanations on leetcode are usually just as good, the course really boils down to being a glorified curated list of leetcode problems.

So below I made a list of leetcode problems that are as close to grokking problems as possible.

Pattern: Sliding Window

• https://leetcode.com/problems/maximum-subarray/ # Close enough
• https://leetcode.com/problems/minimum-size-subarray-sum/

venkatsgithub1

import java.util.Arrays;
import static com.mongodb.client.model.Filters.eq;
import static com.mongodb.client.model.Aggregates.group;
import static com.mongodb.client.model.Accumulators.sum;

Arrays.asList(group(eq("$substr", Arrays.asList("$title", 3L, -1L)), sum("count", 1L)));

venkatsgithub1

const person = {
    first: 'John',
    last: 'Doe',
    country: 'India',
    city: 'Bengaluru'
};

func1 = (data) => {
    console.log({ data });
}

venkatsgithub1

import json
import csv

with open('./test.json', 'r') as f1:
    # read data as string.
    data_json = f1.read()
    # loads method converts string data into dictionary.
    dict1=json.loads(data_json)
    print dict1
    # accessing data

venkatsgithub1

import json
import csv

with open('./test.json', 'r') as f1:
    # read data as string.
    data_json = f1.read()
    # loads method converts string data into dictionary.
    dict1=json.loads(data_json)
    print(dict1)
    # accessing data

venkatsgithub1

import requests
import time

url = 'https://xkcd.com/'

url_data = []

start = time.time()

for i in range(1821, 1831):

venkatsgithub1

class UseMySQL:
    # Importing MySQLdb and as a smaller name for reusing it.
    # To install MySQL Python connection use below command:
    # pip install mysqlclient
    import MySQLdb as _mysql

    def __init__(self, host, user, password, db):
        """
        Initializing MySQL details in init method.

venkatsgithub1

package demo.java.lambdas;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

public class MyLambda1 {

    public static void main(String[] args) {

venkatsgithub1

package demo.java.lambdas;

public class Person {
    private String name;
    private int age;

    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }

venkatsgithub1

package demo.java.lambdas;

import java.util.ArrayList;
import java.util.Comparator;
import java.util.List;

public class MyLambdalessExample {
    public static void main(String[] args) {
        List<Person> personList = new ArrayList<>();