Javascript Node Js basic to Advance
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// fetch song Lyrics
require("jsshort")
async function fLyrics (lyrics){
require("axios").get('https://song.panditsiddharth.repl.co/lyrics?song=' + lyrics)
.then(response => {
console.log(response.data);
})
}
input("Enter song name in 2-3 words")
.then(song => fLyrics(song))// Use jsshort lib for input (simpler)
require("jsshort")
async function sum(){
let a = await input("Enter first number: ")
let b = await input("Enter 2nd number: ")
print("Sum of both numbers is:", end= " ")
print(int(a)+int(b))
}
sum()
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// Fetch song lyrics
const input = require("input");
const axios = require("axios");
const readline = require('readline');
const rl = readline.createInterface({
input: process.stdin,
output: process.stdout
});
rl.question("Enter song name in 2-3 words: ", async (lyrics) => {
axios.get('https://song.panditsiddharth.repl.co/lyrics?song=' + lyrics)
.then(response => {
console.log(response.data);
})
.catch(error => {
console.error("Error fetching lyrics:", error);
});
rl.close();
});
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// Sin² theta + Cos² theta
const theta = Math.PI / 4; // angle in radians
const sinTheta = Math.sin(theta);
const cosTheta = Math.cos(theta);
const result = Math.pow(sinTheta, 2) + Math.pow(cosTheta, 2);
console.log(result);
// @Jscode0
// Octal to binary conversion with steps
function loop(oct){
let bin = ""
for(let i = 0; i < oct.length; i++){
let a = parseInt(oct[i], 8).toString(2).padStart(3, '0')
console.log( oct[i] + " = " + a);
bin += a
}
return bin
}
const readline = require('readline');
const rl = readline.createInterface({
input: process.stdin,
output: process.stdout
});
rl.question('Enter Octal number: ', (input) => {
let oct = "" + input
for(let i = 0; i < oct.length; i++){
if(oct[i] > '7' || oct[i] < '0')
if(oct[i] != '.')
return console.log(oct + " is not a correct octal num")
}
console.log( "Given octal number: " + oct +"\n");
if(oct.includes(".")){
let ar = oct.split(".")
console.log( "Equivalent binary numbers for each octal number: ");
console.log( "\nNow After placing each binary in sequence: \n\nOctal " + oct + " in binary is " + loop(ar[0]) + "." + loop(ar[1]));
} else {
console.log( "Equivalent binary numbers for each octal number: ");
console.log( "\nNow After placing each binary in sequence: \n\nOctal " + oct + " in binary is " + loop(oct));
}
rl.close();
}) // @JsCode0
// Decimal to Hexadecimal conversion with steps shown
function hex(ele){
switch(ele){
case 10: ele = "A"; break;
case 11: ele = "B"; break;
case 12: ele = "C"; break;
case 13: ele = "D"; break;
case 14: ele = "E"; break;
case 15: ele = "F"; break;
}
return ele;
}
function frac(frk) {
if (frk === 0) {
return 0;
}
console.log("\nNow multiplying fractional part by 16");
let i = 0;
let hex = "";
while (frk != 0 && i < 7) {
console.log(frk + " x 16 integer " + Math.floor(frk * 16));
frk = frk * 16;
let k = Math.floor(frk);
hex += k;
frk = (frk - k).toFixed(5);
i++;
}
return hex;
}
function integer(intgr) {
if (intgr < 1) {
return 0;
}
console.log("Now dividing integer part by 16: ");
let temp = "";
let arr1 = []
// let arr2 = []
let i = 0;
while (intgr > 0) {
let hx = hex(intgr % 16)
console.log(intgr + "/16 reminder " + hx);
arr1[i++] = hx;
intgr = Math.floor(intgr / 16);
}
const reversedStr = arr1.reverse().join("");
return reversedStr;
}
const readline = require('readline');
const rl = readline.createInterface({
input: process.stdin,
output: process.stdout
});
rl.question('Enter decimal number: ', (input) => {
let dcml = input;
let intgr = Math.floor(dcml);
let frk = (dcml - intgr).toFixed(6);
console.log("Given decimal " + dcml + "\n");
if (frk == 0) {
console.log("\nHexadecimal is " + integer(intgr));
} else {
console.log("First we divide this number into two parts: integer and fractional part.\n" + dcml + " = " + intgr + " + " + frk + "\n");
console.log("\nAfter adding both parts:\nHexadecimal is " + integer(intgr) + (frk != 0 ? ("." + frac(frk)) : ""));
}
rl.close();
}); // @jscode0
// Decimal to Octal conversion with steps shown
function frac(frk) {
if (frk === 0) {
return 0;
}
console.log("\nNow multiplying fractional part by 8");
let i = 0;
let binary = "";
while (frk != 0 && i < 7) {
console.log(frk + " x 8 integer " + Math.floor(frk * 8));
frk = frk * 8;
let k = Math.floor(frk);
binary += k;
frk = (frk - k).toFixed(5);
i++;
}
return binary;
}
function integer(intgr) {
if (intgr < 1) {
return 0;
}
console.log("Now dividing integer part by 8: ");
let temp = "";
while (intgr > 0) {
console.log(intgr + "/8 reminder " + intgr % 8);
temp += intgr % 8;
intgr = Math.floor(intgr / 8);
}
const reversedStr = temp.split("").reverse().join("");
return reversedStr;
}
const readline = require('readline');
const rl = readline.createInterface({
input: process.stdin,
output: process.stdout
});
rl.question('Enter decimal number: ', (input) => {
let dcml = input;
let intgr = Math.floor(dcml);
let frk = (dcml - intgr).toFixed(6);
console.log("Given decimal " + dcml + "\n");
if (frk == 0) {
console.log("\nOctal is " + integer(intgr));
} else {
console.log("First we divide this number into two parts: integer and fractional part.\n" + dcml + " = " + intgr + " + " + frk + "\n");
console.log("\nAfter adding both parts:\nOctal is " + integer(intgr) + (frk != 0 ? ("." + frac(frk)) : ""));
}
rl.close();
}); // @jscode0
// Decimal to binary conversion with steps shown
function frac(frk) {
if (frk === 0) {
return 0;
}
console.log("\nNow multiplying fractional part by 2");
let i = 0;
let binary = "";
while (frk != 0 && i < 7) {
console.log(frk + " x 2 integer " + Math.floor(frk * 2));
frk = frk * 2;
let k = Math.floor(frk);
binary += k;
frk = (frk - k).toFixed(5);
i++;
}
return binary;
}
function integer(intgr) {
if (intgr < 1) {
return 0;
}
console.log("Now dividing integer part by 2: ");
let temp = "";
while (intgr > 0) {
console.log(intgr + "/2 reminder " + intgr % 2);
temp += intgr % 2;
intgr = Math.floor(intgr / 2);
}
const reversedStr = temp.split("").reverse().join("");
return reversedStr;
}
const readline = require('readline');
const rl = readline.createInterface({
input: process.stdin,
output: process.stdout
});
rl.question('Enter decimal number: ', (input) => {
let dcml = input;
let intgr = Math.floor(dcml);
let frk = (dcml - intgr).toFixed(6);
console.log("Given decimal " + dcml + "\n");
if (frk == 0) {
console.log("\nBinary is " + integer(intgr));
} else {
console.log("First we divide this number into two parts: integer and fractional part.\n" + dcml + " = " + intgr + " + " + frk + "\n");
console.log("\nAfter adding both parts:\nBinary is " + integer(intgr) + (frk != 0 ? ("." + frac(frk)) : ""));
}
rl.close();
});
// @jsCode0
// Decimal integer to binary number
function integer(intgr) {
if (intgr < 1)
return 0;
console.log("Now dividing decimal by 2: ")
let temp = "";
while (intgr > 0) {
console.log(intgr + "/2 reminder " + intgr % 2);
temp += intgr % 2;
intgr = Math.floor(intgr / 2);
}
const reversedStr = temp.split("").reverse().join("");
return reversedStr;
}
let dcml = 10;
let intgr = Math.floor(dcml);
console.log("Given decimal " + dcml + "\n");
console.log("\nBinary is " + integer(intgr));
// run it and see its result and shareit
const message = String.fromCodePoint(32, 72, 97, 112, 112, 121, 32, 73, 110, 100, 101, 112, 101, 110, 100, 101, 110, 99, 101, 32, 100, 97, 121, 33);
console.log('\u{1F1EE}\u{1F1F3}' + message);
// @jscode0
// fetch song lyrics
let url = "https://song.panditsiddharth.repl.co/lyrics?song=ae+watan"
require("axios").get(url)
.then((e)=>{console.log(e.data)})
// fetch song link
require("axios").get("https://song.panditsiddharth.repl.co/song?song=ae+watan")
.then((e)=>{console.log(e.data)})
String functions
1.
length: Returns the length of a string.
2. toUpperCase(): Converts a string to uppercase.
3. toLowerCase(): Converts a string to lowercase.
4. indexOf(searchValue, startIndex): Returns the index of the first occurrence of a specified value in a string, starting from the specified index.
5. lastIndexOf(searchValue, startIndex): Returns the index of the last occurrence of a specified value in a string, starting from the specified index.
6. substring(startIndex, endIndex): Extracts a substring from a string, between the specified start and end indexes.
7. slice(startIndex, endIndex): Extracts a section of a string and returns a new string, between the specified start and end indexes.
8. replace(searchValue, replaceValue): Replaces occurrences of specified value with another value in a string.
9. split(separator): Splits a string into an array of substrings based on the specified separator.
10. trim(): Removes whitespace from both ends of a string.
11. startsWith(searchValue, startIndex): Returns true if a string starts with the specified value; otherwise, returns false.
12. endsWith(searchValue, endIndex): Returns true if a string ends with the specified value; otherwise, returns false.
13. charAt(index): Returns the character at the specified index of a string.
14. concat(str1, str2, ...): Concatenates two or more strings and returns a new string.
15. includes(searchValue, startIndex): Returns true if a string contains the specified value; otherwise, returns false.
16. match(regex): Searches a string for a match against a regular expression and returns an array of matches.
@jscode0 #share #support// Curried function
function multiply(a) {
return function(b) {
return a * b;
}
}
// Curried function can be used with partial application
const multiplyByTwo = multiply(2);
console.log(multiplyByTwo(4)); // Output: 8
// Or it can be invoked with all arguments at once
console.log(multiply(3)(5));
// @jscode0
// get lyrics of any song
require('axios')
.get('https://song.panditsiddharth.repl.co/lyrics?song=ram+siya+ram')
.then(r=>console.log(r.data))
// @jsCode0
