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Articles by Monica Mona
Page 3 of 7
Find Weekday using Zeller's Algorithm
Zeller’s Algorithm is used to find the weekday from a given date. The formula to find weekday using Zeller’s Algorithm is here:The formula is containing some variables; They are −d − The day of the date.m: It is the month code. From March to December it is 3 to 12, for January it is 13, and for February it is 14. When we consider January or February, then given year will be decreased by 1.y − Last two digits of the yearc − first two digits of the yearw − The weekday. When it is 0, it is Saturday, when ...
Read MoreNumber to Roman Numerals
Roman numbers are non-positional numbers. Some numerals are placed together to form a number in roman numbers. For an example the number 75 can be expressed as 75 = 50 + 10 + 10 + 5, so the roman numerals are LXXV.In this problem one number is provided in a decimal format, our task is to convert it into the Roman numeral strings.There are different symbols and their value, like this.IIVVIXXXLLXCCCDDCMMMMMMV’145910405090100400500900100040005000Using this table, we can easily find the roman numerals of a given number.Input and OutputInput: Decimal number: 3569 Output: The Roman equivalent of 3569 is: MMMDLXIXAlgorithmdecToRoman(nuList, num)Input: The numeral list ...
Read MoreFlood fill Algorithm
One matrix is given; the matrix is representing the one screen. Each element (i, j) of the screen is denoted as a pixel, the color of that pixel is marked with different numbers. In this algorithm, the pixels will be filled with new color when it is already in selected previous color. If the previous color is not the previous color, that pixel will not be filled. After filling a pixel, it will check for its up, down, left and right pixels to do the same.The idea is really simple, first, we check whether the selected position is colored with ...
Read MoreFactorial of a large number
In computers, variables are stored in memory locations. But the size of the memory location is fixed, so when we try to find the factorial of some greater value like 15! or 20! the factorial value exceeds the memory range and returns wrong results.For calculation of large numbers, we have to use an array to store results. In each element of the array, is storing different digits of the result. But here we cannot multiply some number with the array directly, we have to perform manual multiplication process for all digits of the result array.Input and OutputInput: A big number: ...
Read MoreFind GCD of two numbers
In mathematics, Greatest Common Divisor (GCD) is the largest possible integer, that divides both of the integers. The condition is that the numbers must be non-zero.We will follow the Euclidean Algorithm to find the GCD of two numbers.Input and OutputInput: Two numbers 51 and 34 Output: The GCD is: 17AlgorithmfindGCD(a, b)Input: Two numbers a and b.Output: GCD of a and b.Begin if a = 0 OR b = 0, then return 0 if a = b, then return b if a > b, then return findGCD(a-b, b) ...
Read MoreWhat are variadic functions in Java?
Methods which uses variable arguments (varargs, arguments with three dots) are known as variadic functions. Example public class Sample { void demoMethod(String... args) { for (String arg: args) { System.out.println(arg); } } public static void main(String args[] ){ new Sample().demoMethod("ram", "rahim", "robert"); new Sample().demoMethod("krishna", "kasyap"); } } Output ram rahim robert krishna kasyap
Read MoreHow to use telephone input type in HTML?
The telephone input type is used in HTML using the . Using this, allow the users to add telephone number.Note − The input type tel is only supported in Safari.ExampleYou can try to run the following code to learn how to use input type tel to allow user input in the form of a telephone number − HTML input search Details: Student Name Student Telephone
Read MoreCreating Dictionary using Javascript
Let's create a MyMap class so that it doesn't hide the actual Map class in JS. We'll create a container object that'll keep track of all our values that we add to the map. We'll also create a display function that prints the map for us. Exampleclass MyMap { constructor() { this.container = {}; } display() { console.log(this.container); } }In ES6, you can directly create a dictionary using the Map class. For example, Exampleconst map1 = new Map(); const map2 = new Map([ ["key1", "value1"], ["key2", "value2"] ]);Checking if ...
Read MoreAdd elements to a Dictionary in Javascript
Now we'll create the put method that'll allow us to put key-value pairs on the dictionary. Now using this we'll implement the put method.Note that JS has objects that act quite like dictionaries. We can just set the container's key property to value. Exampleput(key, value) { this.container[key] = value; }You can test this and the previous functions using − Exampleconst myMap = new MyMap() myMap.put("key1", "value1") myMap.put("key2", "value2") myMap.display() console.log(myMap.hasKey("key1")); console.log(myMap.hasKey("key3"));OutputThis will give the output −{key1: "value1", key2: "value2"} true falseIn ES6, you can put a key-value pair in a map using the set method. For example, Exampleconst myMap ...
Read MoreSearch Element in a Dictionary using Javascript
We'll implement the get method that searches a given key in the dictionary. Exampleget(key) { if(this.hasKey(key)) { return this.container[key]; } return undefined; }Again, JS objects are very much implemented like dictionaries, hence have most of the functionality we can use directly without any more code needed. This is also heavily optimized, so you don't have to worry about the runtime of the function.You can test this using − Exampleconst myMap = new MyMap(); myMap.put("key1", "value1"); myMap.put("key2", "value2"); console.log(myMap.get("key1")) console.log(myMap.get("key2")) console.log(myMap.get("key3"))OutputThis will give the output −value1 value2 undefinedIn ES6, you have the same functionality using the ...
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