Node Programming Examples

Execute Node.js Online

node

/* Simple Hello World in Node.js */
console.log("Hello World");
var recordtype = '6';
var transactioncode = '22';
var routingnumberr = '110000009';
var routingnumber = routingnumberr.substring(0,8);
var accountnumber = 123456789;
var name = "Lahari Areti";
var namelenth =  22;
console.log("name len",name.length);
var finalnamelenth = namelenth - name.length;
console.log("finalnamelenth",finalnamelenth);

var amount = "5000";
var amountlength = 10;
var finalamountlength = amountlength - amount.length;
var totalamount;
console.log("finalamountlength",finalamountlength);
var checkdigit = routingnumberr.toString()[8];
console.log("digit",checkdigit);
count = 17;
var individualid = "";
console.log(accountnumber.toString().length);
 var c1 = accountnumber.toString().length
console.log(typeof(accountnumber));
var discretarydata= "";
var addendarecord = '0';

var transitioncode = "071000280000001";
console.log("transitioncode",transitioncode,transitioncode.length);




var txt = " ";

    // for (var i = 0; i < count; i++) {
        
     if ( c1 == count){
         console.log("a",accountnumber)
         
     }
     else{
         c2 = count - c1;
         for (var i = 0; i < c2; i++) {
         accountnumber+=txt;
         console.log( i , "accountnumber1111",accountnumber);
         
     }
      
       
    }
     console.log( "accountnoh",accountnumber.length,typeof(accountnumber),accountnumber);
     
    if(amount.length == amountlength) {
        
        console.log("no change in amount",amount);
        
    }
    else{
        for(var j =0 ;j<finalamountlength;j++){
          amount = '0'+amount;
          console.log("with zeros",amount);
        }
        console.log("amount with all zeros",amount);
        
    }
     console.log("amount with 10 digits ",amount,amount.length,typeof(amount));
     
     for(var k = 0;k<15;k++){
         individualid +=txt;
     }
     console.log("finalindividalid",individualid,individualid.length);
     
     
     if(name.length == namelenth) {
        
        console.log("no change in amount",name);
        
    }
    else{
        for(var j =0 ;j<finalnamelenth;j++){
             name+=txt;
          console.log("with zeros",name);
        }
        console.log("names with spaces",name,name.length);
        
    }
     
     
      for(var k = 0;k<2;k++){
         discretarydata +=txt;
     }
     console.log("finalindividalid",discretarydata,discretarydata.length);
     
     
     
     
   final = ( recordtype + transactioncode + routingnumber+checkdigit+accountnumber+amount+individualid+name+discretarydata+addendarecord+transitioncode);
   console.log(final,final.length);

Node.js Hello World Example

node

var x = {
 
"hcid":"733A65848",
    
"subscriberid":"490949705",

"mbrseqno":"10",

"mbrfirstnm":"JAMES",

"mbrlastnm":"16-JUN-82",

"birthdt":"12.00.00.000000000 AM",

"grpid":"INDIV"

}


//add the element

x.mbrmidnm="JOHNSON";

console.log("added" +JSON.stringify(x));



//delete the element

delete x.grpid;

console.log("deleted "+JSON.stringify(x));



//print the element

console.log("printing "+x.subscriberid);

Node.js Copy Buffer

node

var buffer1 = new Buffer('ABC');

//copy a buffer
var buffer23 = new Buffer(3);


console.log("buffer2_Fresh content: " + buffer23.toString());


buffer1.copy(buffer2);
console.log("buffer2 content: " + buffer2.toString());

console.log("buffer1 content: " + buffer1.toString());

cvfdmjk,l;'/.,mnbvc

node

// Import events module
var events = require('events');

// Create an eventEmitter object
var eventEmitter = new events.EventEmitter();

// Create an event handler as follows
var connectHandler = function connected() {
   console.log('connection succesful.');
  
   // Fire the data_received event 
   eventEmitter.emit('data_received');
}

// Bind the connection event with the handler
eventEmitter.on('connection', connectHandler);
 
// Bind the data_received event with the anonymous function
eventEmitter.on('data_received', function(){
   console.log('data received succesfully.');
});

// Fire the connection event 
eventEmitter.emit('connection');

console.log("Program Ended.");

Node Project1

node

/* Simple Hello World in Node.js */
console.log("Hello World");

Execute Node.js Online

node

/* Node.js was a little tricky, as it makes use of its own architecture,
in addition to javascript. Additonally, creating a server proved too much
for me at this time! But the online IDEs worked just fine.*/

const readline = require('readline'); // Load in readline module.
const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout
});

var input;
var primeTotal = [];

rl.question('Please enter any positve integer.\n\nThis program lists all prime numbers between 1 and your chosen number.\n\n', (value) => {
    
    input = value; // Assigns user input to a global variable.
    
});


function findPrimes (limit) {
    
    var primes = true; // Simple modulo function to sift out primes.
    
    for (j = 2; j < limit; j++) {
        
      if (limit % j === 0) {
          
        primes = false;
        
        break;
        
      }
      
    } 
    
    return primes; // Return any number without a non-prime factor.
}
  
  
function printPrimes (x) { // We pass this function the user input.
        
    var userInput = parseInt(x, 10); // convert input string to integer.
    
    var testNum = userInput + 1; // ensures consecutive primes are listed.
    
    for(var i = 2; i<testNum; i++) {
            
        if (findPrimes(i)) {
            
            primeTotal.push(i); // Enter every prime into array variable.
            
            console.log(i + '\n')
        }
        
        if (i == testNum - 1) {
            
            var add = function(a, b) {
                
                return a + b;
                
                }
            
            var sum = primeTotal.reduce(add, 0); // Sums array of primes.
            
            console.log("The total of the primes that were located is: " + sum + ".")
        }
    }
    
    if (testNum < 3) { // Catch user input less than 2.
        
        console.log("There are no primes less than 2.");
    }
    
}

process.stdin.on('data',function(data) {
    
    printPrimes(input); // In the event of an input, run printPrimes.
 
    process.exit();
});

// P.S. how would you catch an input of 0? Thanks, Joel.

first

node

/* Simple Hello World in Node.js */
console.log("Hello World");

Node.js Hello World Example

node

/* Hello, World! program in node.js */
console.log("Hello, js!")

Execute Node.js Online

node

/* Simple Hello World in Node.js */
const path = require('path')
console.log("Hello World");
console.log(path.join(__dirname, "duonghk"))

Addition.js

node

var exports=module.exports={};
exports.AddNumber=function(a,b)
{
return a+b;
};

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