/**
* 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 1208 0.3 0.4 1309440 75028 ? Ssl 2025 1568:26 node /home/sasa/dex8/dex8-panel/server/index.js sasa 1236 0.5 0.6 11820740 100448 ? Ssl 2025 2476:32 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js sasa 1257 0.3 0.4 1307492 73004 ? Ssl 2025 1587:31 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js sasa 1289 0.3 0.4 1301008 69020 ? Ssl 2025 1563:53 node /home/sasa/dex8/dex8-kiosk/server/index.js sasa 1363 4.2 3.4 12270648 569888 ? Ssl 2025 20122:05 node /home/sasa/voovuu/voovuu-pub/server/index.js sasa 1886 7.5 3.8 12292924 629564 ? Rsl 2025 35588:06 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index. www-data 1170792 0.0 0.0 2608 600 ? S 10:18 0:00 sh -c ps -aux | grep node www-data 1170794 0.0 0.0 3304 648 ? S 10:18 0:00 grep node sasa 1214480 0.3 0.7 22311168 123388 ? Ssl 2025 1368:09 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214483 0.3 0.3 1101824 64532 ? Ssl 2025 1256:20 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214536 0.3 0.3 1101828 65128 ? Ssl 2025 1254:39 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214544 0.3 0.3 1102568 65164 ? Ssl 2025 1264:59 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214588 0.3 0.4 1102340 65548 ? Ssl 2025 1258:30 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214617 0.3 0.4 1102208 66444 ? Ssl 2025 1254:04 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214641 0.3 0.4 1169000 66804 ? Ssl 2025 1245:34 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214671 0.3 0.3 1100128 63308 ? Ssl 2025 1239:34 node /home/sasa/dex8/dex8-worker/starter.js sasa 1215731 0.9 0.7 11847748 123700 ? Ssl 2025 3452:53 node /home/sasa/dex8/dex8-api/starter.js sasa 1216489 0.3 0.3 1101560 64228 ? Ssl 2025 1254:39 node /home/sasa/dex8/dex8-worker/starter.js sasa 1399960 0.8 0.6 11817052 111248 ? Ssl Apr20 1872:47 node /home/sasa/dex8/dex8-www/server/index.js sasa 1631573 0.5 0.4 1303668 81136 ? Ssl May31 786:16 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr sasa 1824679 0.4 0.5 11798848 84080 ? Ssl Aug15 209:22 node /home/sasa/kriptus/kriptus-panel/server/index.js sasa 2448036 1.3 0.9 11857076 158196 ? Ssl Aug21 509:39 node /home/sasa/miko/miko-hr/server/index.js sasa 2628167 0.7 0.7 1175516 129720 ? Ssl 2025 3593:52 node /home/sasa/voovuu/voovuu-api/starter.js sasa 2663246 2.4 0.7 11843996 125540 ? Ssl Aug23 834:31 node /home/sasa/kriptus/kriptus-api/starter.js sasa 3168557 0.6 0.6 11828676 104204 ? Ssl 2025 2777:16 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js sasa 3169051 0.5 0.5 11799488 83448 ? Ssl 2025 2286:07 node /home/sasa/@mikosoft/dodo-examples/server/index.js sasa 3264954 0.6 0.5 1333376 86576 ? Ssl Feb21 2066:28 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js sasa 3358795 0.6 0.5 1266904 89528 ? Ssl Aug29 163:02 node /home/sasa/miko/miko-hr/api/starter.js sasa 3809381 0.3 0.5 11804964 94772 ? Ssl Sep02 69:56 node /home/sasa/dex8/dex8-worker/starter.js