..:: 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         914  0.5  0.5 1306448 83384 ?       Ssl  Aug04 311:04 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa         935  0.7  0.8 11786840 132560 ?     Ssl  Aug04 461:10 node /home/sasa/dex8/dex8-api/starter.js
sasa         938  0.4  0.4 1306780 75880 ?       Ssl  Aug04 262:00 node /home/sasa/regoch/regoch-www/server
sasa         945  0.3  0.4 1303752 71252 ?       Ssl  Aug04 225:05 node /home/sasa/dex8/dex8-panel/server/index.js
sasa         947  0.7  0.7 11835940 121872 ?     Ssl  Aug04 460:41 node /home/sasa/dex8/dex8-www/server/index.js
sasa         966  0.5  0.5 11808976 97196 ?      Ssl  Aug04 346:09 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa         980  0.7  0.5 1330216 83020 ?       Ssl  Aug04 471:41 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa         997  0.3  0.4 1303104 72520 ?       Ssl  Aug04 227:18 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1021  0.3  0.3 1297920 65464 ?       Ssl  Aug04 224:12 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1065  0.6  0.5 11822176 96836 ?      Ssl  Aug04 380:59 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa        1074  0.6  0.6 1149316 104288 ?      Ssl  Aug04 372:18 node /home/sasa/voovuu/voovuu-api/starter.js
sasa        1136  0.7  0.9 11866036 162628 ?     Ssl  Aug04 433:50 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1148  0.4  0.4 11794644 77924 ?      Ssl  Aug04 248:01 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa        1197  0.3  0.4 1102956 66612 ?       Ssl  Aug04 231:42 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1199  0.3  0.4 22277756 77876 ?      Ssl  Aug04 235:00 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1308  0.3  0.4 1102176 65828 ?       Ssl  Aug04 231:02 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1325  0.3  0.4 1102176 65940 ?       Ssl  Aug04 230:51 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1393  0.7  0.8 22324452 144376 ?     Ssl  Aug04 477:19 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1395  0.3  0.4 1102188 66264 ?       Ssl  Aug04 231:59 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1489  0.3  0.4 1101920 65628 ?       Ssl  Aug04 231:54 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1496  0.3  0.4 1103200 68048 ?       Ssl  Aug04 230:39 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1607  0.3  0.4 1101920 65788 ?       Ssl  Aug04 231:13 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1608  0.3  0.3 1102432 65464 ?       Ssl  Aug04 230:05 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1686  1.1  0.9 11846976 148212 ?     Ssl  Aug04 680:00 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
www-data  608853  0.0  0.0   2608   592 ?        S    15:04   0:00 sh -c ps -aux | grep node
www-data  608855  0.0  0.0   3304   652 ?        R    15:04   0:00 grep node
sasa     1371685  0.4  0.5 11816616 96604 ?      Ssl  Aug16 185:05 node /home/sasa/mikosoft-info/solar-wind-energy/server/index.js
sasa     1460918  0.4  0.3 1300136 65288 ?       Ssl  Aug17 182:45 node /home/sasa/sites-nodejs/oxygen-free-copper/server.js