{"id":11249,"date":"2015-11-10T23:38:28","date_gmt":"2015-11-11T04:38:28","guid":{"rendered":"http:\/\/bangla.salearningschool.com\/?p=11249"},"modified":"2015-11-10T10:47:01","modified_gmt":"2015-11-10T15:47:01","slug":"node-js-global-objects","status":"publish","type":"post","link":"http:\/\/bangla.sitestree.com\/?p=11249","title":{"rendered":"Node.js &#8211; \u09b8\u09be\u09b0\u09cd\u09ac\u099c\u09a8\u09c0\u09a8 \u0985\u09ac\u099c\u09c7\u0995\u09cd\u099f (Global Objects)"},"content":{"rendered":"<p><strong>\u09ae\u09cb\u09b9\u09be\u09ae\u09cd\u09ae\u09a6 \u0986\u09ac\u09cd\u09a6\u09c1\u09b2\u09cd\u09b2\u09be\u09b9<\/strong><\/p>\n<p>Node.js \u098f\u09b0 \u0997\u09cd\u09b2\u09cb\u09ac\u09be\u09b2 \u0985\u09ac\u099c\u09c7\u0995\u09cd\u099f\u0997\u09c1\u09b2\u09cb \u09b8\u09be\u09a7\u09be\u09b0\u09a8\u09a4 \u09b8\u0995\u09b2 \u09ae\u09cb\u09a1\u09bf\u0989\u09b2 \u09a5\u09c7\u0995\u09c7 \u09b8\u09b0\u09be\u09b8\u09b0\u09bf \u098f\u0995\u09b8\u09c7\u09b8 \u0995\u09b0\u09be \u09af\u09be\u09df \u0964 \u09a4\u09be\u0987 \u098f\u0987 \u0997\u09cd\u09b2\u09cb\u09ac\u09be\u09b2 \u0985\u09ac\u099c\u09c7\u0995\u09cd\u099f\u0997\u09c1\u09b2\u09cb\u0995\u09c7 \u0995\u09cb\u09a8 \u0985\u09cd\u09af\u09be\u09aa \u09a5\u09c7\u0995\u09c7 \u0985\u09a8\u09cd\u09a4\u09b0\u09cd\u09ad\u09c2\u0995\u09cd\u09a4 \u0995\u09b0\u09a4\u09c7 \u09b9\u09df \u09a8\u09be \u0964 \u098f\u0987 \u0997\u09cd\u09b2\u09cb\u09ac\u09be\u09b2 \u0985\u09ac\u099c\u09c7\u0995\u09cd\u099f\u0997\u09c1\u09b2\u09cb \u09b8\u09be\u09a7\u09be\u09b0\u09a8\u09a4 \u09ae\u09cb\u09a1\u09bf\u0989\u09b2, \u09ab\u09be\u0982\u09b6\u09a8, \u09b8\u09cd\u099f\u09cd\u09b0\u09c0\u0982 \u0985\u09a5\u09ac\u09be \u0985\u09ac\u099c\u09c7\u0995\u09cd\u099f\u0993 \u09b9\u09df\u09c7 \u09a5\u09be\u0995\u09c7 \u09af\u09be \u09a8\u09bf\u09ae\u09cd\u09a8\u09c7 \u09ac\u09cd\u09af\u09be\u0996\u09cd\u09af\u09be \u0995\u09b0\u09be \u09b9\u09df\u09c7\u099b\u09c7 \u0964<\/p>\n<h2>__filename<\/h2>\n<p>__filename, \u09af\u09c7\u0987 \u09ab\u09be\u0987\u09b2 \u09a5\u09c7\u0995\u09c7 \u0995\u09cb\u09a1 \u09b0\u09be\u09a8 \u0995\u09b0\u09be \u09b9\u099a\u09cd\u099b\u09c7 \u09b8\u09c7\u0987 \u09ab\u09be\u0987\u09b2\u09c7\u09b0 \u09a8\u09be\u09ae \u09aa\u09cd\u09b0\u0995\u09be\u09b6 \u0995\u09b0\u09c7 \u09a5\u09be\u0995\u09c7 \u0964 \u098f\u099f\u09bf \u0995\u09cb\u09a1 \u09ab\u09be\u0987\u09b2\u09c7\u09b0 \u09b8\u09ae\u09cd\u09aa\u09c2\u09b0\u09cd\u09a3 \u09aa\u09a5 \u09aa\u09cd\u09b0\u09bf\u09a8\u09cd\u099f \u0995\u09b0\u09c7 \u09a5\u09be\u0995\u09c7 \u0964<\/p>\n<p>\u0989\u09a6\u09be\u09b9\u09b0\u09a3<br \/>\n\u098f\u0995\u099f\u09bf javascript (main.js) \u098f \u09a8\u09bf\u09ae\u09cd\u09a8\u09c7\u09b0 \u0995\u09cb\u09a1 copy\/paste \u0995\u09b0\u09c7 \u09a6\u09bf\u09a8<\/p>\n<hr \/>\n<pre>console.log( __filename );<\/pre>\n<hr \/>\n<p>&nbsp;<\/p>\n<p>\u098f\u0996\u09a8 main.js \u09ab\u09be\u0987\u09b2\u099f\u09bf \u09b0\u09be\u09a8 \u0995\u09b0\u09be\u09a8<\/p>\n<hr \/>\n<pre>$ node main.js<\/pre>\n<hr \/>\n<p>&nbsp;<\/p>\n<p>\u0986\u09aa\u09a8\u09be\u09b0 \u09aa\u09cd\u09b0\u09cb\u0997\u09cd\u09b0\u09be\u09ae\u09c7\u09b0 \u09b8\u09a0\u09bf\u0995 \u0985\u09ac\u09b8\u09cd\u09a5\u09be\u09a8 \u0985\u09a8\u09c1\u09af\u09be\u09df\u09c0 \u09a8\u09bf\u09ae\u09cd\u09a8\u09c7\u09b0 \u09ab\u09be\u0987\u09b2 \u09a8\u09be\u09ae \u09aa\u09cd\u09b0\u0995\u09be\u09b6 \u0995\u09b0\u09ac\u09c7\u0983<\/p>\n<hr \/>\n<pre>\/web\/com\/1427091028_21099\/main.js<\/pre>\n<hr \/>\n<p>&nbsp;<\/p>\n<h2>__dirname<\/h2>\n<p>__dirname \u09b8\u09be\u09a7\u09be\u09b0\u09a8\u09a4 \u09af\u09c7\u0987 \u09a1\u09bf\u09b0\u09c7\u0995\u09cd\u099f\u09b0\u09c0 \u09a5\u09c7\u0995\u09c7 \u09b8\u09cd\u0995\u09cd\u09b0\u09c0\u09aa\u09cd\u099f \u09b0\u09be\u09a8 \u0995\u09b0\u09be \u09b9\u099a\u09cd\u099b\u09c7 \u0993\u0987 \u09a1\u09bf\u09b0\u09c7\u0995\u09cd\u099f\u09b0\u09c0\u09b0 \u09a8\u09be\u09ae \u09aa\u09cd\u09b0\u0995\u09be\u09b6 \u0995\u09b0\u09c7 \u09a5\u09be\u0995\u09c7 \u0964<\/p>\n<p>\u0989\u09a6\u09be\u09b9\u09b0\u09a3<br \/>\n\u098f\u0995\u099f\u09bf javascript (main.js) \u098f \u09a8\u09bf\u09ae\u09cd\u09a8\u09c7\u09b0 \u0995\u09cb\u09a1 copy\/paste \u0995\u09b0\u09c7 \u09a6\u09bf\u09a8<\/p>\n<hr \/>\n<pre>console.log( __dirname );<\/pre>\n<hr \/>\n<p>&nbsp;<\/p>\n<p>\u098f\u0996\u09a8 main.js \u09ab\u09be\u0987\u09b2\u099f\u09bf \u09b0\u09be\u09a8 \u0995\u09b0\u09be\u09a8<\/p>\n<hr \/>\n<pre>$ node main.js<\/pre>\n<hr \/>\n<p>&nbsp;<\/p>\n<p>\u0986\u09aa\u09a8\u09be\u09b0 \u09aa\u09cd\u09b0\u09cb\u0997\u09cd\u09b0\u09be\u09ae\u09c7\u09b0 \u09b8\u09a0\u09bf\u0995 \u0985\u09ac\u09b8\u09cd\u09a5\u09be\u09a8 \u0985\u09a8\u09c1\u09af\u09be\u09df\u09c0 \u09a8\u09bf\u09ae\u09cd\u09a8\u09c7\u09b0 \u09a1\u09bf\u09b0\u09c7\u0995\u09cd\u099f\u09b0\u09c0\u09b0 \u09a8\u09be\u09ae \u09aa\u09cd\u09b0\u0995\u09be\u09b6 \u0995\u09b0\u09ac\u09c7\u0983<\/p>\n<hr \/>\n<pre>\/web\/com\/1427091028_21099<\/pre>\n<hr \/>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<h2>setTimeout(cb, ms)<\/h2>\n<p>setTimeout(cb, ms) \u0997\u09cd\u09b2\u09cb\u09ac\u09be\u09b2 \u09ab\u09be\u0982\u09b6\u09a8 \u09a6\u09bf\u09df\u09c7 \u0985\u09a8\u09cd\u09a4\u09a4 &#8216; ms &#8216; \u09ae\u09bf\u09b2\u09bf\u09b8\u09c7\u0995\u09c7\u09a8\u09cd\u09a1 \u09ac\u09bf\u09b2\u09ae\u09cd\u09ac\u09c7 \u0995\u09b2\u09ac\u09cd\u09af\u09be\u0995 \u09ab\u09be\u0982\u09b6\u09a8 &#8216; cb &#8216; \u0995\u09c7 \u0995\u09b2 \u0995\u09b0\u09be \u09b9\u09df\u09c7 \u09a5\u09be\u0995\u09c7 \u0964 \u098f\u0987 \u09ac\u09bf\u09b2\u09ae\u09cd\u09ac \u0995\u09bf\u099b\u09c1 \u09ac\u09be\u09b9\u09cd\u09af\u09bf\u0995 \u09ab\u09be\u0995\u09cd\u099f\u09b0 \u098f\u09b0 \u0989\u09aa\u09b0 \u09a8\u09bf\u09b0\u09cd\u09ad\u09b0\u09b6\u09c0\u09b2 \u0989\u09a6\u09be\u09b9\u09be\u09b0\u09a8 \u09b8\u09cd\u09ac\u09b0\u09c1\u09aa OS timer granularity \u098f\u09ac\u0982 system load \u0964 \u098f\u0995\u099f\u09bf \u099f\u09be\u0987\u09ae\u09be\u09b0\u09c7\u09b0 \u09ac\u09cd\u09af\u09be\u09aa\u09cd\u09a4\u09bf \u09e8\u09ea.\u09ee \u09a6\u09bf\u09a8\u09c7\u09b0 \u09ac\u09c7\u09b6\u09c0 \u09b9\u09a4\u09c7 \u09aa\u09be\u09b0\u09ac\u09c7 \u09a8\u09be \u0964<\/p>\n<p>\u0989\u09a6\u09be\u09b9\u09b0\u09a3<br \/>\n\u098f\u0995\u099f\u09bf javascript (main.js) \u098f \u09a8\u09bf\u09ae\u09cd\u09a8\u09c7\u09b0 \u0995\u09cb\u09a1 copy\/paste \u0995\u09b0\u09c7 \u09a6\u09bf\u09a8<\/p>\n<hr \/>\n<pre>function printHello(){\r\n     console.log( \"Hello, World!\");\r\n }\r\n \/\/ Now call above function after 2 seconds\r\n setTimeout(printHello, 2000);<\/pre>\n<hr \/>\n<p>&nbsp;<\/p>\n<p>\u098f\u0996\u09a8 main.js \u09ab\u09be\u0987\u09b2\u099f\u09bf \u09b0\u09be\u09a8 \u0995\u09b0\u09be\u09a8<\/p>\n<hr \/>\n<pre>$ node main.js<\/pre>\n<hr \/>\n<p>&nbsp;<\/p>\n<p>\u09af\u09be\u099a\u09be\u0987 \u0995\u09b0\u09c7 \u09a6\u09c7\u0996\u09c1\u09a8 \u0986\u0989\u099f\u09aa\u09c1\u099f \u0995\u09bf\u099b\u09c1\u099f\u09be \u09ac\u09bf\u09b2\u09ae\u09cd\u09ac\u09c7 \u0986\u09b8\u099b\u09c7 \u0995\u09bf\u09a8\u09be<\/p>\n<hr \/>\n<pre>Hello, World!<\/pre>\n<hr \/>\n<p>&nbsp;<\/p>\n<h2>clearTimeout(t)<\/h2>\n<p>clearTimeout( t ) \u0997\u09cd\u09b2\u09cb\u09ac\u09be\u09b2 \u09ab\u09be\u0982\u09b6\u09a8 \u09a6\u09bf\u09df\u09c7 \u09aa\u09c2\u09b0\u09cd\u09ac\u09c7 setTimeout(cb, ms) \u09a6\u09bf\u09df\u09c7 \u09af\u09c7\u0987 \u099f\u09be\u0987\u09ae\u09be\u09b0 \u09b8\u09c7\u099f \u0995\u09b0\u09be \u09b9\u09df\u09c7\u099b\u09c7 \u09a4\u09be \u09ac\u09a8\u09cd\u09a7 \u0995\u09b0\u09a4\u09c7 \u09ac\u09cd\u09af\u09ac\u09b9\u09be\u09b0 \u0995\u09b0\u09be \u09b9\u09df \u0964<\/p>\n<p>\u0989\u09a6\u09be\u09b9\u09b0\u09a3<br \/>\n\u098f\u0995\u099f\u09bf javascript (main.js) \u098f \u09a8\u09bf\u09ae\u09cd\u09a8\u09c7\u09b0 \u0995\u09cb\u09a1 copy\/paste \u0995\u09b0\u09c7 \u09a6\u09bf\u09a8<\/p>\n<hr \/>\n<pre>function printHello(){\r\n       console.log( \"Hello, World!\");\r\n }\r\n \/\/ Now call above function after 2 seconds\r\n var t = setTimeout(printHello, 2000);\r\n \/\/ Now clear the timer<\/pre>\n<hr \/>\n<p>&nbsp;<\/p>\n<h2>clearTimeout(t)<\/h2>\n<p>\u098f\u0996\u09a8 main.js \u09ab\u09be\u0987\u09b2\u099f\u09bf \u09b0\u09be\u09a8 \u0995\u09b0\u09be\u09a8<\/p>\n<hr \/>\n<pre>$ node main.js<\/pre>\n<hr \/>\n<p>\u09af\u09be\u099a\u09be\u0987 \u0995\u09b0\u09c7 \u09a6\u09c7\u0996\u09c1\u09a8 \u0986\u0989\u099f\u09aa\u09c1\u099f\u09c7 \u0995\u09bf\u099b\u09c1 \u09aa\u09cd\u09b0\u09bf\u09a8\u09cd\u099f \u0995\u09b0\u099b\u09c7 \u0995\u09bf\u09a8\u09be<\/p>\n<p>&nbsp;<\/p>\n<h2>setInterval(cb, ms)<\/h2>\n<p>setInterval(cb, ms) \u09a6\u09bf\u09df\u09c7 \u0985\u09a8\u09cd\u09a4\u09a4 &#8216; ms &#8216; \u09ae\u09bf\u09b2\u09bf\u09b8\u09c7\u0995\u09c7\u09a8\u09cd\u09a1 \u09ac\u09bf\u09b2\u09ae\u09cd\u09ac\u09c7 \u09ac\u09be\u09b0\u09ac\u09be\u09b0 \u0995\u09b2\u09ac\u09cd\u09af\u09be\u0995 \u09ab\u09be\u0982\u09b6\u09a8 &#8216; cb &#8216; \u0995\u09c7 \u0995\u09b2 \u0995\u09b0\u09a4\u09c7 \u09a5\u09be\u0995\u09c7 \u0964 \u098f\u0987 \u09ac\u09bf\u09b2\u09ae\u09cd\u09ac \u0995\u09bf\u099b\u09c1 \u09ac\u09be\u09b9\u09cd\u09af\u09bf\u0995 \u09ab\u09be\u0995\u09cd\u099f\u09b0 \u098f\u09b0 \u0989\u09aa\u09b0 \u09a8\u09bf\u09b0\u09cd\u09ad\u09b0\u09b6\u09c0\u09b2 \u0989\u09a6\u09be\u09b9\u09be\u09b0\u09a8 \u09b8\u09cd\u09ac\u09b0\u09c1\u09aa OS timer granularity \u098f\u09ac\u0982 system load \u0964 \u098f\u0995\u099f\u09bf \u099f\u09be\u0987\u09ae\u09be\u09b0\u09c7\u09b0 \u09ac\u09cd\u09af\u09be\u09aa\u09cd\u09a4\u09bf \u09e8\u09ea.\u09ee \u09a6\u09bf\u09a8\u09c7\u09b0 \u09ac\u09c7\u09b6\u09c0 \u09b9\u09a4\u09c7 \u09aa\u09be\u09b0\u09ac\u09c7 \u09a8\u09be \u0964<\/p>\n<p>\u098f\u0995\u099f\u09bf javascript (main.js) \u098f \u09a8\u09bf\u09ae\u09cd\u09a8\u09c7\u09b0 \u0995\u09cb\u09a1 copy\/paste \u0995\u09b0\u09c7 \u09a6\u09bf\u09a8<\/p>\n<hr \/>\n<pre>function printHello(){\r\n     console.log( \"Hello, World!\");\r\n }\r\n \/\/ Now call above function after 2 seconds\r\n setInterval(printHello, 2000);<\/pre>\n<hr \/>\n<p>&nbsp;<\/p>\n<p>\u098f\u0996\u09a8 main.js \u09ab\u09be\u0987\u09b2\u099f\u09bf \u09b0\u09be\u09a8 \u0995\u09b0\u09be\u09a8<\/p>\n<hr \/>\n<p>$ node main.js<\/p>\n<hr \/>\n<p>\u0989\u09aa\u09b0\u09c7\u09b0 \u09aa\u09cd\u09b0\u09cb\u0997\u09cd\u09b0\u09be\u09ae\u099f\u09bf \u09aa\u09cd\u09b0\u09a4\u09bf \u09e8 \u09b8\u09c7\u0995\u09c7\u09a8\u09cd\u09a1 \u09aa\u09b0\u09aa\u09b0 printHello() \u09ab\u09be\u0982\u09b6\u09a8 \u0995\u09c7 \u0995\u09b2 \u0995\u09b0\u09a4\u09c7 \u09a5\u09be\u0995\u09ac\u09c7 \u0964<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u09ae\u09cb\u09b9\u09be\u09ae\u09cd\u09ae\u09a6 \u0986\u09ac\u09cd\u09a6\u09c1\u09b2\u09cd\u09b2\u09be\u09b9 Node.js \u098f\u09b0 \u0997\u09cd\u09b2\u09cb\u09ac\u09be\u09b2 \u0985\u09ac\u099c\u09c7\u0995\u09cd\u099f\u0997\u09c1\u09b2\u09cb \u09b8\u09be\u09a7\u09be\u09b0\u09a8\u09a4 \u09b8\u0995\u09b2 \u09ae\u09cb\u09a1\u09bf\u0989\u09b2 \u09a5\u09c7\u0995\u09c7 \u09b8\u09b0\u09be\u09b8\u09b0\u09bf \u098f\u0995\u09b8\u09c7\u09b8 \u0995\u09b0\u09be \u09af\u09be\u09df \u0964 \u09a4\u09be\u0987 \u098f\u0987 \u0997\u09cd\u09b2\u09cb\u09ac\u09be\u09b2 \u0985\u09ac\u099c\u09c7\u0995\u09cd\u099f\u0997\u09c1\u09b2\u09cb\u0995\u09c7 \u0995\u09cb\u09a8 \u0985\u09cd\u09af\u09be\u09aa \u09a5\u09c7\u0995\u09c7 \u0985\u09a8\u09cd\u09a4\u09b0\u09cd\u09ad\u09c2\u0995\u09cd\u09a4 \u0995\u09b0\u09a4\u09c7 \u09b9\u09df \u09a8\u09be \u0964 \u098f\u0987 \u0997\u09cd\u09b2\u09cb\u09ac\u09be\u09b2 \u0985\u09ac\u099c\u09c7\u0995\u09cd\u099f\u0997\u09c1\u09b2\u09cb \u09b8\u09be\u09a7\u09be\u09b0\u09a8\u09a4 \u09ae\u09cb\u09a1\u09bf\u0989\u09b2, \u09ab\u09be\u0982\u09b6\u09a8, \u09b8\u09cd\u099f\u09cd\u09b0\u09c0\u0982 \u0985\u09a5\u09ac\u09be \u0985\u09ac\u099c\u09c7\u0995\u09cd\u099f\u0993 \u09b9\u09df\u09c7 \u09a5\u09be\u0995\u09c7 \u09af\u09be \u09a8\u09bf\u09ae\u09cd\u09a8\u09c7 \u09ac\u09cd\u09af\u09be\u0996\u09cd\u09af\u09be \u0995\u09b0\u09be \u09b9\u09df\u09c7\u099b\u09c7 \u0964 __filename __filename, \u09af\u09c7\u0987 \u09ab\u09be\u0987\u09b2 \u09a5\u09c7\u0995\u09c7 \u0995\u09cb\u09a1 \u09b0\u09be\u09a8 \u0995\u09b0\u09be \u09b9\u099a\u09cd\u099b\u09c7 \u09b8\u09c7\u0987 \u09ab\u09be\u0987\u09b2\u09c7\u09b0 &hellip; <\/p>\n<p><a class=\"more-link btn\" href=\"http:\/\/bangla.sitestree.com\/?p=11249\">Continue 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