..:: Source code - 01var_identifier.js ::..

/**
 * Variable identifier
 *  - can use any letter, digit, underscore (_) or dollar sign ($)
 *  - must start with _ , $ or letter
 *  - can't start with number
 */

//Good identifiers
var _name = 'John';
var firstName = 'Mary';
var $name = "Dollar";
var secondName2 = 'Smith';


//Bad identifiers
//var 5name = 'John'; //SyntaxError: identifier starts immediately after numeric literal
 

..:: NodeJS Console - 01var_identifier.js ::..

$ node 01var_identifier.js

		
		
$ps -aux | grep node (list all node processes)
sasa        1194  0.5  0.5 1304164 82060 ?       Ssl  Oct24 333:29 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1200  0.9  0.8 11724544 142104 ?     Ssl  Oct24 593:34 node /home/sasa/dex8/dex8-api/starter.js
sasa        1208  0.3  0.4 1303976 72800 ?       Ssl  Oct24 240:26 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1224  0.9  0.6 11815916 100812 ?     Ssl  Oct24 588:28 node /home/sasa/dex8/dex8-www/server/index.js
sasa        1236  0.5  0.5 11812620 97700 ?      Ssl  Oct24 371:51 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1255  0.7  0.5 1330860 83836 ?       Ssl  Oct24 500:46 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa        1257  0.3  0.4 1300548 69640 ?       Ssl  Oct24 243:54 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.4 1298204 65940 ?       Ssl  Oct24 240:27 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  3.2  2.7 12154280 447204 ?     Ssl  Oct24 2010:39 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1449  0.4  0.3 1232360 64360 ?       Ssl  Oct24 252:11 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1528  1.8  2.9 33156456 486832 ?     Rsl  Oct24 1141:51 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1529  0.4  0.3 1100388 64528 ?       Ssl  Oct24 251:46 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1606  0.4  0.3 1100644 65344 ?       Ssl  Oct24 251:43 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1607  0.4  0.3 1101156 65388 ?       Ssl  Oct24 251:06 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1705  0.4  0.4 1101928 66652 ?       Ssl  Oct24 251:17 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1706  0.3  0.3 1101412 65168 ?       Ssl  Oct24 250:49 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1805  0.4  0.4 1167968 68348 ?       Ssl  Oct24 251:23 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1807  0.3  0.3 1100128 64256 ?       Ssl  Oct24 246:11 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1885  0.3  0.3 1100136 64820 ?       Ssl  Oct24 247:39 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1886  1.9  0.9 11857488 160320 ?     Ssl  Oct24 1200:00 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
www-data 1557369  0.0  0.0   2608   592 ?        S    04:04   0:00 sh -c ps -aux | grep node
www-data 1557371  0.0  0.0   3304   644 ?        S    04:04   0:00 grep node
sasa     2628167  0.8  0.7 1172852 129000 ?      Ssl  Nov04 402:29 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     3168557  0.6  0.5 11823060 97992 ?      Ssl  Nov06 294:37 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.4  0.5 11798664 83196 ?      Ssl  Nov06 195:06 node /home/sasa/@mikosoft/dodo-examples/server/index.js