/** * basic usage of callbacks */ /* MAIN FUNCTION */ function addnum(x, cb) { console.log('x=' + x); cb(x); } /* CALLBACKS */ //callback which adds 5 function cb5(a) { var rez = a + 5; console.log('a+5=' + rez); } //callback which adds 100 function cb100(a) { var rez = a + 100; console.log('a+100=' + rez); } //execute main function with callback cb5 addnum(2, cb5); console.log(); //execute main function with callback cb100 addnum(2, cb100); /* $node 01callback x=2 a+5=7 x=2 a+100=102 */
x=2 a+5=7 x=2 a+100=102
$ps -aux | grep node (list all node processes) sasa 831 0.5 0.4 1303396 78328 ? Ssl Jun15 173:23 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr sasa 843 0.5 0.6 11699532 104892 ? Ssl Jun15 177:27 node /home/sasa/dex8/dex8-api/starter.js sasa 858 0.3 0.4 1304640 73112 ? Ssl Jun15 133:12 node /home/sasa/regoch/regoch-www/server sasa 867 0.3 0.4 1300556 68240 ? Ssl Jun15 124:21 node /home/sasa/dex8/dex8-panel/server/index.js sasa 886 0.7 0.5 11798864 88448 ? Ssl Jun15 264:00 node /home/sasa/dex8/dex8-www/server/index.js sasa 888 0.5 0.4 11794048 79656 ? Ssl Jun15 184:13 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js sasa 904 0.7 0.5 1329652 82084 ? Ssl Jun15 245:53 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js sasa 910 0.3 0.4 1300240 69192 ? Ssl Jun15 125:13 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js sasa 969 0.3 0.3 1297976 65068 ? Ssl Jun15 123:53 node /home/sasa/dex8/dex8-kiosk/server/index.js sasa 970 0.6 0.5 11813624 95940 ? Ssl Jun15 225:57 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js sasa 1010 0.6 0.6 1148612 104472 ? Ssl Jun15 209:51 node /home/sasa/voovuu/voovuu-api/starter.js sasa 1016 0.8 1.1 11908084 194596 ? Ssl Jun15 271:04 node /home/sasa/voovuu/voovuu-pub/server/index.js sasa 1086 0.4 0.4 11794656 78308 ? Ssl Jun15 134:53 node /home/sasa/@mikosoft/dodo-examples/server/index.js sasa 1089 0.3 0.4 1100380 65620 ? Ssl Jun15 126:53 node /home/sasa/dex8/dex8-worker/starter.js sasa 1159 0.3 0.4 22276156 75888 ? Ssl Jun15 130:00 node /home/sasa/dex8/dex8-worker/starter.js sasa 1160 0.3 0.3 1100380 65236 ? Ssl Jun15 127:04 node /home/sasa/dex8/dex8-worker/starter.js sasa 1241 0.3 0.3 1102488 64304 ? Ssl Jun15 127:27 node /home/sasa/dex8/dex8-worker/starter.js sasa 1242 0.4 0.5 22284008 84088 ? Ssl Jun15 134:49 node /home/sasa/dex8/dex8-worker/starter.js sasa 1323 0.3 0.3 1100124 64760 ? Ssl Jun15 127:07 node /home/sasa/dex8/dex8-worker/starter.js sasa 1324 0.3 0.3 1100896 64872 ? Ssl Jun15 127:04 node /home/sasa/dex8/dex8-worker/starter.js sasa 1398 0.3 0.3 1100384 65036 ? Ssl Jun15 127:07 node /home/sasa/dex8/dex8-worker/starter.js sasa 1400 0.3 0.3 1100636 64560 ? Ssl Jun15 127:30 node /home/sasa/dex8/dex8-worker/starter.js sasa 1465 0.3 0.3 1100896 65144 ? Ssl Jun15 127:00 node /home/sasa/dex8/dex8-worker/starter.js sasa 178968 0.8 0.6 11811988 99504 ? Ssl Jun17 251:52 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index. sasa 337381 1.2 1.4 1469776 240948 ? Ssl Jun19 339:12 node /home/sasa/crypto/dex-arbitrage-bot/scripts/observer/index2 www-data 1704701 0.0 0.0 2608 592 ? S 10:17 0:00 sh -c ps -aux | grep node www-data 1704703 0.0 0.0 3304 732 ? S 10:17 0:00 grep node