{"id":9963,"date":"2015-07-27T18:38:23","date_gmt":"2015-07-27T22:38:23","guid":{"rendered":"http:\/\/bangla.salearningschool.com\/?p=9963"},"modified":"2015-11-10T08:29:44","modified_gmt":"2015-11-10T13:29:44","slug":"%e0%a6%a8%e0%a7%8b%e0%a6%a1-%e0%a6%9c%e0%a7%87-%e0%a6%8f%e0%a6%b8-%e0%a5%a4-node-js-%e0%a6%ac%e0%a6%be%e0%a6%ab%e0%a6%be%e0%a6%b0","status":"publish","type":"post","link":"http:\/\/bangla.sitestree.com\/?p=9963","title":{"rendered":"\u09a8\u09cb\u09a1.\u099c\u09c7\u098f\u09b8 : Node.js &#8211; \u09ac\u09be\u09ab\u09be\u09b0"},"content":{"rendered":"<p>\u09b0\u09bf\u09a6\u0993\u09df\u09be\u09a8 \u09ac\u09bf\u09a8 \u09b6\u09be\u09ae\u09c0\u09ae<\/p>\n<p>&nbsp;<\/p>\n<p>\u09aa\u09bf\u0989\u09b0 \u099c\u09be\u09ad\u09be\u09b8\u09cd\u0995\u09cd\u09b0\u09bf\u09aa\u09cd\u099f \u0987\u0989\u09a8\u09bf\u0995\u09cb\u09a1 \u09ac\u09be\u09a8\u09cd\u09a7\u09ac \u0995\u09bf\u09a8\u09cd\u09a4\u09c1 \u09ac\u09be\u0987\u09a8\u09be\u09b0\u09bf \u09a1\u09be\u099f\u09be\u09df \u09a4\u09c7\u09ae\u09a8 \u09a8\u09bf\u0996\u09c1\u0981\u09a4 \u09a8\u09df\u0964 \u099f\u09bf\u09b8\u09bf\u09aa\u09bf \u09b8\u09bf\u09b8\u09cd\u099f\u09c7\u09ae \u09ac\u09be \u09ab\u09be\u0987\u09b2 \u09b8\u09cd\u099f\u09cd\u09b0\u09bf\u09ae \u09a8\u09bf\u09df\u09c7 \u0995\u09be\u099c \u0995\u09b0\u09be\u09b0 \u09b8\u09ae\u09df \u0985\u0995\u09cd\u099f\u09c7\u099f \u09b8\u09cd\u099f\u09cd\u09b0\u09bf\u09ae \u09a8\u09bf\u09df\u09a8\u09cd\u09a4\u09cd\u09b0\u09a3\u09c7\u09b0 \u09aa\u09cd\u09b0\u09df\u09cb\u099c\u09a8 \u09b9\u09df\u0964 \u09a8\u09a1 \u09ac\u09be\u09ab\u09be\u09b0 \u0995\u09cd\u09b2\u09be\u09b8 \u09aa\u09cd\u09b0\u09ad\u09be\u0987\u09a1 \u0995\u09b0\u09c7 \u09af\u09be \u0995\u09bf\u09a8\u09be \u09aa\u09c2\u09b0\u09cd\u09a3\u09b8\u0982\u0996\u09cd\u09af\u09be\u09b0 \u0985\u09cd\u09af\u09be\u09b0\u09bf\u09b0 \u09b8\u09a6\u09c3\u09b6 \u2018\u09b0\u2019 \u09a1\u09be\u099f\u09be \u09b8\u0982\u09b0\u0995\u09cd\u09b7\u09a3\u09c7\u09b0 \u09b8\u09c1\u09af\u09cb\u0997 \u09a6\u09c7\u09df \u0995\u09bf\u09a8\u09cd\u09a4\u09c1 \u09ad\u09bf\u09ee \u09b9\u09bf\u09aa\u09c7\u09b0(V8 heap)\u09ac\u09be\u0987\u09b0\u09c7 \u2018\u09b0\u2019 \u09ae\u09c7\u09ae\u09cb\u09b0\u09bf \u098f\u09b2\u09cb\u0995\u09c7\u09b6\u09a8\u09c7\u09b0 \u09b8\u09be\u09a5\u09c7 \u09b8\u09c1\u09b8\u0982\u09b9\u09a4 \u09a5\u09be\u0995\u09c7\u0964<\/p>\n<p>\u09ac\u09be\u09ab\u09be\u09b0 \u0995\u09cd\u09b2\u09be\u09b8 \u0997\u09cd\u09b2\u09cb\u09ac\u09be\u09b2 \u0995\u09cd\u09b2\u09be\u09b8, \u098f\u099f\u09bf \u09ac\u09be\u09ab\u09be\u09b0 \u09ae\u09a1\u09bf\u0989\u09b2 \u0987\u09ae\u09aa\u09cb\u09b0\u09cd\u099f \u0995\u09b0\u09be \u099b\u09be\u09dc\u09be\u0987 \u098f\u09aa\u09cd\u09b2\u09bf\u0995\u09c7\u09b6\u09a8\u09c7 \u09ac\u09cd\u09af\u09ac\u09b9\u09be\u09b0 \u0995\u09b0\u09be \u09b8\u09ae\u09cd\u09ad\u09ac\u0964<\/p>\n<h2>\u09ac\u09be\u09ab\u09be\u09b0 \u09a4\u09c8\u09b0\u09bf \u0995\u09b0\u09be<\/h2>\n<p>\u0995\u09df\u09c7\u0995\u099f\u09bf \u0989\u09aa\u09be\u09df\u09c7 \u09ac\u09be\u09ab\u09be\u09b0 \u09a4\u09c8\u09b0\u09bf \u0995\u09b0\u09be \u09af\u09c7\u09a4\u09c7 \u09aa\u09be\u09b0\u09c7,<\/p>\n<p><strong>\u09aa\u09cd\u09b0\u09a5\u09ae \u09aa\u09a6\u09cd\u09a7\u09a4\u09bf\u0983<\/strong> \u09e7\u09e6 \u0985\u0995\u09cd\u099f\u09c7\u099f\u09c7\u09b0 \u0986\u09a8\u0987\u09a8\u09bf\u09b8\u09bf\u09df\u09c7\u099f\u09c7\u09a1 \u09ac\u09be\u09ab\u09be\u09b0 \u09a4\u09c8\u09b0\u09bf\u09b0 \u09b8\u09bf\u09a8\u099f\u09cd\u09af\u09be\u0995\u09cd\u09b8,<\/p>\n<hr \/>\n<p>var buf = new Buffer(10);<\/p>\n<hr \/>\n<p>&nbsp;<\/p>\n<p><strong>\u09a6\u09cd\u09ac\u09bf\u09a4\u09c0\u09df \u09aa\u09a6\u09cd\u09a7\u09a4\u09bf\u0983<\/strong> \u09aa\u09cd\u09b0\u09a6\u09a4\u09cd\u09a4 \u0985\u09cd\u09af\u09be\u09b0\u09bf \u09a5\u09c7\u0995\u09c7 \u09ac\u09be\u09ab\u09be\u09b0 \u09a4\u09c8\u09b0\u09bf\u09b0 \u09b8\u09bf\u09a8\u099f\u09cd\u09af\u09be\u0995\u09cd\u09b8,<\/p>\n<hr \/>\n<p>var buf = new Buffer([10, 20, 30, 40, 50]);<\/p>\n<hr \/>\n<p>&nbsp;<\/p>\n<p><strong>\u09a4\u09c3\u09a4\u09c0\u09df \u09aa\u09a6\u09cd\u09a7\u09a4\u09bf\u0983<\/strong> \u09aa\u09cd\u09b0\u09a6\u09a4\u09cd\u09a4 \u09b8\u09cd\u099f\u09cd\u09b0\u09bf\u0982 \u09a5\u09c7\u0995\u09c7 \u09ac\u09be\u09ab\u09be\u09b0 \u09a4\u09c8\u09b0\u09bf\u09b0 \u09b8\u09bf\u09a8\u099f\u09cd\u09af\u09be\u0995\u09cd\u09b8 \u0993 \u0985\u09aa\u09b6\u09a8\u09be\u09b2 \u098f\u09a8\u0995\u09cb\u09a1\u09bf\u0982 \u099f\u09be\u0987\u09aa,<\/p>\n<hr \/>\n<p>var buf = new Buffer(&#8220;Simply Easy Learning&#8221;, &#8220;utf-8&#8221;);<\/p>\n<hr \/>\n<p>&nbsp;<\/p>\n<p>\u09af\u09a6\u09bf\u0993 \u09a1\u09bf\u09ab\u09b2\u09cd\u099f \u098f\u09a8\u0995\u09cb\u09a1\u09bf\u0982 \u09b9\u09b2 &#8220;utf8&#8221; , \u0986\u09ae\u09b0\u09be &#8220;ascii&#8221;, &#8220;utf8&#8221;, &#8220;utf16le&#8221;, &#8220;ucs2&#8221;, &#8220;base64&#8221; \u09ac\u09be &#8220;hex&#8221; \u0987\u09a4\u09cd\u09af\u09be\u09a6\u09bf\u0993 \u09ac\u09cd\u09af\u09ac\u09b9\u09be\u09b0 \u0995\u09b0\u09a4\u09c7 \u09aa\u09be\u09b0\u09bf\u0964<\/p>\n<h2>\u09ac\u09be\u09ab\u09be\u09b0\u09c7 \u09b2\u09c7\u0996\u09be<\/h2>\n<p>\u09a8\u09a1 \u09ac\u09be\u09ab\u09be\u09b0\u09c7 \u09b2\u09c7\u0996\u09be\u09b0 \u099c\u09a8\u09cd\u09af \u09b8\u09bf\u09a8\u099f\u09cd\u09af\u09be\u0995\u09cd\u09b8,<\/p>\n<hr \/>\n<p>buf.write(string[, offset][, length][, encoding])<\/p>\n<hr \/>\n<p>&nbsp;<\/p>\n<p>\u09aa\u09cd\u09af\u09be\u09b0\u09be\u09ae\u09bf\u099f\u09be\u09b0\u0983 \u09b8\u0982\u09b6\u09cd\u09b2\u09bf\u09b7\u09cd\u099f \u09aa\u09cd\u09af\u09be\u09b0\u09be\u09ae\u09bf\u099f\u09be\u09b0\u0997\u09c1\u09b2\u09cb \u09b9\u09b2,<\/p>\n<ul>\n<li>\u09b8\u09cd\u099f\u09cd\u09b0\u09bf\u0982<\/li>\n<li>\u0985\u09ab\u09b8\u09c7\u099f<\/li>\n<li>\u09b2\u09c7\u09a8\u09cd\u09a5<\/li>\n<li>\u098f\u09a8\u0995\u09cb\u09a1\u09bf\u0982<\/li>\n<\/ul>\n<h2>\u09b0\u09bf\u099f\u09be\u09b0\u09cd\u09a8 \u09ad\u09cd\u09af\u09be\u09b2\u09c1<\/h2>\n<p>\u098f\u0987 \u09aa\u09cd\u09b0\u0995\u09cd\u09b0\u09bf\u09df\u09be \u09b2\u09bf\u0996\u09bf\u09a4 \u0985\u0995\u09cd\u099f\u09c7\u099f\u09c7\u09b0 \u09a8\u09be\u09ae\u09cd\u09ac\u09be\u09b0 \u09b0\u09bf\u099f\u09be\u09b0\u09cd\u09a8 \u0995\u09b0\u09be\u09df\u0964 \u09ac\u09be\u09ab\u09be\u09b0\u09c7 \u09aa\u09c1\u09b0\u09cb \u09b8\u09cd\u099f\u09cd\u09b0\u09bf\u0982\u098f\u09b0 \u099c\u09be\u09df\u0997\u09be \u09a8\u09be \u09a5\u09be\u0995\u09b2\u09c7 \u0986\u0982\u09b6\u09bf\u0995 \u09b2\u09c7\u0996\u09be \u09b9\u09df\u0964 \u09af\u09c7\u09ae\u09a8,<\/p>\n<hr \/>\n<p>buf = new Buffer(256);<br \/>\nlen = buf.write(&#8220;Simply Easy Learning&#8221;);<\/p>\n<p>console.log(&#8220;Octets written : &#8220;+ len);<\/p>\n<hr \/>\n<p>&nbsp;<\/p>\n<p>\u098f\u099f\u09bf \u09b8\u09a0\u09bf\u0995\u09ad\u09be\u09ac\u09c7 \u09b8\u09ae\u09cd\u09aa\u09be\u09a6\u09bf\u09a4 \u09b9\u09b2\u09c7 \u09a4\u09be \u09af\u09c7 \u09ab\u09b2\u09be\u09ab\u09b2 \u09a6\u09c7\u0996\u09be\u09ac\u09c7 \u09a4\u09be \u09b9\u09b2,<\/p>\n<hr \/>\n<p>Octets written : 20<\/p>\n<hr \/>\n<p>&nbsp;<\/p>\n<p>\u09ac\u09be\u09ab\u09be\u09b0 \u09a5\u09c7\u0995\u09c7 \u09aa\u09dc\u09be\u0983 \u098f\u099c\u09a8\u09cd\u09af \u09aa\u09cd\u09b0\u09df\u09cb\u099c\u09a8\u09c0\u09df \u09b8\u09bf\u09a8\u099f\u09cd\u09af\u09be\u0995\u09cd\u09b8 \u09b9\u09b2,<br \/>\nbuf.toString([encoding][, start][, end])<\/p>\n<p>\u098f\u09b0 \u09aa\u09cd\u09af\u09be\u09b0\u09be\u09ae\u09bf\u099f\u09be\u09b0\u0997\u09c1\u09b2\u09cb \u09b9\u09b2,<\/p>\n<ul>\n<li>\u098f\u09a8\u0995\u09cb\u09a1\u09bf\u0982<\/li>\n<li>\u09b8\u09cd\u099f\u09be\u09b0\u09cd\u099f<\/li>\n<li>\u098f\u09a8\u09cd\u09a1<\/li>\n<\/ul>\n<p>\u0989\u09a6\u09be\u09b9\u09b0\u09a3,<\/p>\n<hr \/>\n<pre> buf = new Buffer(26);\r\n for (var i = 0 ; i &lt; 26 ; i++) {\r\n buf[i] = i + 97;\r\n }<\/pre>\n<pre>console.log( buf.toString('ascii')); \/\/ outputs: abcdefghijklmnopqrstuvwxyz\r\n console.log( buf.toString('ascii',0,5)); \/\/ outputs: abcde\r\n console.log( buf.toString('utf8',0,5)); \/\/ outputs: abcde\r\n console.log( buf.toString(undefined,0,5)); \/\/ encoding defaults to 'utf8', outputs abcde\r\n \u098f\u099f\u09bf \u09b8\u09a0\u09bf\u0995\u09ad\u09be\u09ac\u09c7 \u09b8\u09ae\u09cd\u09aa\u09be\u09a6\u09bf\u09a4 \u09b9\u09b2\u09c7 \u09a4\u09be \u09af\u09c7 \u09ab\u09b2\u09be\u09ab\u09b2 \u09a6\u09c7\u0996\u09be\u09ac\u09c7 \u09a4\u09be \u09b9\u09b2,\r\n abcdefghijklmnopqrstuvwxyz\r\n abcde\r\n abcde\r\n abcde<\/pre>\n<hr \/>\n<p>&nbsp;<\/p>\n<p>\u09ac\u09be\u09ab\u09be\u09b0 \u09a5\u09c7\u0995\u09c7 \u099c\u09c7\u098f\u09b8\u0993\u098f\u09a8\u09c7 \u09b0\u09c2\u09aa\u09be\u09a8\u09cd\u09a4\u09b0\u09c7\u09b0 \u09b8\u09bf\u09a8\u099f\u09cd\u09af\u09be\u0995\u09cd\u09b8,<\/p>\n<hr \/>\n<p>buf.toJSON()<\/p>\n<hr \/>\n<p>&nbsp;<\/p>\n<p>\u098f\u099f\u09bf\u09b0 \u0989\u09a6\u09be\u09b9\u09b0\u09a3,<\/p>\n<hr \/>\n<pre>var buf = new Buffer('Simply Easy Learning');\r\n var json = buf.toJSON(buf);<\/pre>\n<pre>console.log(json);<\/pre>\n<hr \/>\n<p>&nbsp;<\/p>\n<p>\u098f\u099f\u09bf \u09b8\u09a0\u09bf\u0995\u09ad\u09be\u09ac\u09c7 \u09b8\u09ae\u09cd\u09aa\u09be\u09a6\u09bf\u09a4 \u09b9\u09b2\u09c7 \u09a4\u09be \u09af\u09c7 \u09ab\u09b2\u09be\u09ab\u09b2 \u09a6\u09c7\u0996\u09be\u09ac\u09c7 \u09a4\u09be \u09b9\u09b2,<\/p>\n<hr \/>\n<p>[ 83, 105, 109, 112, 108, 121, 32, 69, 97, 115, 121, 32, 76, 101, 97, 114, 110, 105, 110, 103 ]<\/p>\n<hr \/>\n<p>&nbsp;<\/p>\n<p>\u0995\u09a8\u0995\u09be\u099f\u09c7\u09a8\u09be\u099f \u09ac\u09be\u09ab\u09be\u09b0\u0983 \u0995\u09a8\u0995\u09be\u099f\u09c7\u09a8\u09be\u099f \u09a8\u09a1 \u09ac\u09be\u09ab\u09be\u09b0 \u09a5\u09c7\u0995\u09c7 \u09b8\u09bf\u0999\u09cd\u0997\u09c7\u09b2 \u09a8\u09a1 \u09ac\u09be\u09ab\u09be\u09b0\u09c7 \u09b0\u09c2\u09aa\u09be\u09a8\u09cd\u09a4\u09b0 \u0995\u09b0\u09be\u09b0 \u09b8\u09bf\u09a8\u099f\u09cd\u09af\u09be\u0995\u09cd\u09b8,<\/p>\n<hr \/>\n<p>Buffer.concat(list[, totalLength])<\/p>\n<hr \/>\n<p>&nbsp;<\/p>\n<p>\u098f\u09b0 \u09aa\u09cd\u09af\u09be\u09b0\u09be\u09ae\u09bf\u099f\u09be\u09b0\u0997\u09c1\u09b2\u09cb \u09b9\u09b2,<\/p>\n<ul>\n<li>\u09b2\u09bf\u09b8\u09cd\u099f<\/li>\n<li>\u099f\u09cb\u099f\u09be\u09b2\u09b2\u09c7\u09a8\u09cd\u09a5<\/li>\n<\/ul>\n<p>\u09b0\u09bf\u099f\u09be\u09b0\u09cd\u09a8 \u09ad\u09cd\u09af\u09be\u09b2\u09c1\u0983 \u09ac\u09be\u09ab\u09be\u09b0 \u0987\u09a8\u09cd\u09b8\u099f\u09c7\u09a8\u09cd\u09b8 \u09b0\u09bf\u099f\u09be\u09b0\u09cd\u09a8 \u0995\u09b0\u09be\u09df\u0964<br \/>\n\u0989\u09a6\u09be\u09b9\u09b0\u09a3,<\/p>\n<hr \/>\n<pre>var buffer1 = new Buffer('TutorialsPoint ');\r\n var buffer2 = new Buffer('Simply Easy Learning');\r\n var buffer3 = Buffer.concat([buffer1,buffer2]);\r\n console.log(\"buffer3 content: \" + buffer3.toString());<\/pre>\n<hr \/>\n<p>&nbsp;<\/p>\n<p>\u098f\u099f\u09bf \u09b8\u09a0\u09bf\u0995\u09ad\u09be\u09ac\u09c7 \u09b8\u09ae\u09cd\u09aa\u09be\u09a6\u09bf\u09a4 \u09b9\u09b2\u09c7 \u09a4\u09be \u09af\u09c7 \u09ab\u09b2\u09be\u09ab\u09b2 \u09a6\u09c7\u0996\u09be\u09ac\u09c7 \u09a4\u09be \u09b9\u09b2,<\/p>\n<hr \/>\n<pre>buffer3 content: TutorialsPoint Simply Easy Learning<\/pre>\n<hr \/>\n<p>&nbsp;<\/p>\n<p>\u09ac\u09be\u09ab\u09be\u09b0 \u09a4\u09c1\u09b2\u09a8\u09be\u0983 \u098f\u09b0 \u099c\u09a8\u09cd\u09af \u09ac\u09cd\u09af\u09ac\u09b9\u09c3\u09a4 \u09b8\u09bf\u09a8\u099f\u09cd\u09af\u09be\u0995\u09cd\u09b8,<\/p>\n<hr \/>\n<pre>buf.compare(otherBuffer);<\/pre>\n<hr \/>\n<p>&nbsp;<\/p>\n<p>\u0989\u09a6\u09be\u09b9\u09b0\u09a3,<\/p>\n<hr \/>\n<pre>var buffer1 = new Buffer('ABC');\r\n var buffer2 = new Buffer('ABCD');\r\n var result = buffer1.compare(buffer2);<\/pre>\n<pre>if(result &lt; 0) {\r\n console.log(buffer1 +\" comes before \" + buffer2);\r\n }else if(result == 0){\r\n console.log(buffer1 +\" is same as \" + buffer2);\r\n }else {\r\n console.log(buffer1 +\" comes after \" + buffer2);\r\n }<\/pre>\n<hr \/>\n<p>&nbsp;<\/p>\n<p>\u098f\u099f\u09bf \u09b8\u09a0\u09bf\u0995\u09ad\u09be\u09ac\u09c7 \u09b8\u09ae\u09cd\u09aa\u09be\u09a6\u09bf\u09a4 \u09b9\u09b2\u09c7 \u09a4\u09be \u09af\u09c7 \u09ab\u09b2\u09be\u09ab\u09b2 \u09a6\u09c7\u0996\u09be\u09ac\u09c7 \u09a4\u09be \u09b9\u09b2,<\/p>\n<hr \/>\n<p>ABC comes before ABCD<\/p>\n<hr \/>\n<p>&nbsp;<\/p>\n<p>\u09ac\u09be\u09ab\u09be\u09b0 \u0995\u09aa\u09bf \u0995\u09b0\u09be\u0983 \u098f\u09b0 \u09b8\u09bf\u09a8\u099f\u09cd\u09af\u09be\u0995\u09cd\u09b8 \u09b9\u09b2,<\/p>\n<hr \/>\n<p>buf.copy(targetBuffer[, targetStart][, sourceStart][, sourceEnd])<\/p>\n<hr \/>\n<p>&nbsp;<\/p>\n<p>\u098f\u09b0 \u09aa\u09cd\u09af\u09be\u09b0\u09be\u09ae\u09bf\u099f\u09be\u09b0\u0997\u09c1\u09b2\u09cb \u09b9\u09b2,<\/p>\n<ul>\n<li>\u099f\u09be\u09b0\u09cd\u0997\u09c7\u099f \u09ac\u09be\u09ab\u09be\u09b0<\/li>\n<li>\u099f\u09be\u09b0\u09cd\u0997\u09c7\u099f \u09b8\u09cd\u099f\u09be\u09b0\u09cd\u099f<\/li>\n<li>\u09b8\u09cb\u09b0\u09cd\u09b8 \u09b8\u09cd\u099f\u09be\u09b0\u09cd\u099f<\/li>\n<li>\u09b8\u09cb\u09b0\u09cd\u09b8 \u098f\u09a8\u09cd\u09a1<\/li>\n<\/ul>\n<p>\u0989\u09a6\u09be\u09b9\u09b0\u09a3,<\/p>\n<hr \/>\n<pre>var buffer1 = new Buffer('ABC');\r\n \/\/copy a buffer\r\n var buffer2 = new Buffer(3);\r\n buffer1.copy(buffer2);\r\n console.log(\"buffer2 content: \" + buffer2.toString());<\/pre>\n<hr \/>\n<p>&nbsp;<\/p>\n<p>\u09b8\u09a0\u09bf\u0995\u09ad\u09be\u09ac\u09c7 \u09b8\u09ae\u09cd\u09aa\u09be\u09a6\u09bf\u09a4 \u09b9\u09b2\u09c7 \u098f\u099f\u09bf \u09ab\u09b2\u09be\u09ab\u09b2 \u09a6\u09c7\u0996\u09be\u09ac\u09c7,<\/p>\n<hr \/>\n<pre>buffer2 content: ABC<\/pre>\n<hr \/>\n<p>&nbsp;<\/p>\n<p>\u09b8\u09cd\u09b2\u09be\u0987\u09b8 \u09ac\u09be\u09ab\u09be\u09b0\u0983 \u098f\u09b0 \u09b8\u09bf\u09a8\u099f\u09cd\u09af\u09be\u0995\u09cd\u09b8 \u09b9\u09b2,<\/p>\n<hr \/>\n<pre>buf.slice([start][, end])<\/pre>\n<hr \/>\n<p>&nbsp;<\/p>\n<p>\u09aa\u09cd\u09af\u09be\u09b0\u09be\u09ae\u09bf\u099f\u09be\u09b0\u0983 \u098f\u09b0 \u09aa\u09cd\u09af\u09be\u09b0\u09be\u09ae\u09bf\u099f\u09be\u09b0 \u0995\u09cb\u09b2,<\/p>\n<ul>\n<li>\u09b8\u09cd\u099f\u09be\u09b0\u09cd\u099f<\/li>\n<li>\u098f\u09a8\u09cd\u09a1<\/li>\n<\/ul>\n<p>\u0989\u09a6\u09be\u09b9\u09b0\u09a3,<\/p>\n<hr \/>\n<pre>var buffer1 = new Buffer('TutorialsPoint');\r\n \/\/slicing a buffer\r\n var buffer2 = buffer1.slice(0,9);\r\n console.log(\"buffer2 content: \" + buffer2.toString());<\/pre>\n<hr \/>\n<p>&nbsp;<\/p>\n<p>\u09b8\u09a0\u09bf\u0995\u09ad\u09be\u09ac\u09c7 \u09b8\u09ae\u09cd\u09aa\u09be\u09a6\u09bf\u09a4 \u09b9\u09b2\u09c7 \u098f\u099f\u09bf \u09ab\u09b2\u09be\u09ab\u09b2 \u09a6\u09c7\u0996\u09be\u09ac\u09c7,<\/p>\n<hr \/>\n<p>buffer2 content: Tutorials<\/p>\n<hr \/>\n<p>&nbsp;<\/p>\n<p>\u09ac\u09be\u09ab\u09be\u09b0 \u09b2\u09c7\u09a8\u09cd\u09a5\u0983 \u098f\u09b0 \u099c\u09a8\u09cd\u09af \u0986\u09ae\u09be\u09a6\u09c7\u09b0 \u09af\u09c7 \u09b8\u09bf\u09a8\u099f\u09cd\u09af\u09be\u0995\u09cd\u09b8 \u09ac\u09cd\u09af\u09ac\u09b9\u09be\u09b0 \u0995\u09b0\u09a4\u09c7 \u09b9\u09ac\u09c7 \u09a4\u09be \u09b9\u09b2,<\/p>\n<hr \/>\n<p>buf.length;<\/p>\n<hr \/>\n<p>&nbsp;<\/p>\n<p>\u0989\u09a6\u09be\u09b9\u09b0\u09a3,<\/p>\n<hr \/>\n<p>var buffer = new Buffer(&#8216;TutorialsPoint&#8217;);<br \/>\n\/\/length of the buffer<br \/>\nconsole.log(&#8220;buffer length: &#8221; + buffer.length);<\/p>\n<hr \/>\n<p>&nbsp;<\/p>\n<p>\u09b8\u09a0\u09bf\u0995\u09ad\u09be\u09ac\u09c7 \u09b8\u09ae\u09cd\u09aa\u09be\u09a6\u09bf\u09a4 \u09b9\u09b2\u09c7 \u098f\u099f\u09bf \u09ab\u09b2\u09be\u09ab\u09b2 \u09a6\u09c7\u0996\u09be\u09ac\u09c7,<\/p>\n<hr \/>\n<p>buffer length: 14<\/p>\n<hr \/>\n<p>&nbsp;<\/p>\n<h2>\u09b0\u09c7\u09ab\u09be\u09b0\u09c7\u09a8\u09cd\u09b8<\/h2>\n<p>\u09a8\u09a1 \u099c\u09c7\u098f\u09b8\u09c7 \u09aa\u09cd\u09b0\u09be\u09aa\u09cd\u09a4 \u09ac\u09be\u09ab\u09be\u09b0 \u09ae\u09a1\u09bf\u0989\u09b2\u09c7\u09b0 \u09b0\u09c7\u09ab\u09be\u09b0\u09c7\u09a8\u09cd\u09b8 \u09a8\u09bf\u099a\u09c7 \u09a6\u09c7\u09df\u09be \u09b9\u09b2,<\/p>\n<p><strong>SN \u09ae\u09c7\u09a5\u09a1<\/strong><\/p>\n<ol>\n<li>new Buffer(size)<\/li>\n<li>new Buffer(buffer)<\/li>\n<li>new Buffer(str[, encoding])<\/li>\n<li>buf.length<\/li>\n<li>buf.write(string[, offset][, length][, encoding])<\/li>\n<li>buf.writeUIntLE(value, offset, byteLength[, noAssert])<\/li>\n<li>buf.writeUIntBE(value, offset, byteLength[, noAssert])<\/li>\n<li>buf.writeIntLE(value, offset, byteLength[, noAssert])<\/li>\n<li>buf.writeIntBE(value, offset, byteLength[, noAssert])<\/li>\n<li>buf.readUIntLE(offset, byteLength[, noAssert])<\/li>\n<li>buf.readUIntBE(offset, byteLength[, noAssert])<\/li>\n<li>buf.readIntLE(offset, byteLength[, noAssert])<\/li>\n<li>buf.readIntBE(offset, byteLength[, noAssert])<\/li>\n<li>buf.toString([encoding][, start][, end])<\/li>\n<li>buf.toJSON()<\/li>\n<li>buf[index]<\/li>\n<li>buf.equals(otherBuffer)<\/li>\n<li>buf.compare(otherBuffer)<\/li>\n<li>buf.copy(targetBuffer[, targetStart][, sourceStart][, sourceEnd])<\/li>\n<li>buf.slice([start][, end])<\/li>\n<li>buf.readUInt8(offset[, noAssert])<\/li>\n<li>buf.readUInt16LE(offset[, noAssert])<\/li>\n<li>buf.readUInt16BE(offset[, noAssert])<\/li>\n<li>buf.readUInt32LE(offset[, noAssert])<\/li>\n<li>buf.readUInt32BE(offset[, noAssert])<\/li>\n<li>buf.readInt8(offset[, noAssert])<\/li>\n<li>buf.readInt16LE(offset[, noAssert])<\/li>\n<li>buf.readInt16BE(offset[, noAssert])<\/li>\n<li>buf.readInt32LE(offset[, noAssert])<\/li>\n<li>buf.readInt32BE(offset[, noAssert])<\/li>\n<li>buf.readFloatLE(offset[, noAssert])<\/li>\n<li>buf.readFloatBE(offset[, noAssert])<\/li>\n<li>buf.readDoubleLE(offset[, noAssert])<\/li>\n<li>buf.readDoubleBE(offset[, noAssert])<\/li>\n<li>buf.writeUInt8(value, offset[, noAssert])<\/li>\n<li>buf.writeUInt16LE(value, offset[, noAssert])<\/li>\n<li>buf.writeUInt16BE(value, offset[, noAssert])<\/li>\n<li>buf.writeUInt32LE(value, offset[, noAssert])<\/li>\n<li>buf.writeUInt32BE(value, offset[, noAssert])<\/li>\n<li>buf.writeInt8(value, offset[, noAssert])<\/li>\n<li>buf.writeInt16LE(value, offset[, noAssert])<\/li>\n<li>buf.writeInt16BE(value, offset[, noAssert])<\/li>\n<li>buf.writeInt32LE(value, offset[, noAssert])<\/li>\n<li>buf.writeInt32BE(value, offset[, noAssert])<\/li>\n<li>buf.writeFloatLE(value, offset[, noAssert])<\/li>\n<li>buf.writeFloatBE(value, offset[, noAssert])<\/li>\n<li>buf.writeDoubleLE(value, offset[, noAssert])<\/li>\n<li>buf.writeDoubleBE(value, offset[, noAssert])<\/li>\n<li>buf.fill(value[, offset][, end])<\/li>\n<\/ol>\n<h2>\u0995\u09cd\u09b2\u09be\u09b8 \u09ae\u09c7\u09a5\u09a1<\/h2>\n<p><strong>SN \u09ae\u09c7\u09a5\u09a1<\/strong><\/p>\n<ol>\n<li>\u00a0 Buffer.isEncoding(encoding)<\/li>\n<li>Buffer.isBuffer(obj)<\/li>\n<li>Buffer.byteLength(string[, encoding])<\/li>\n<li>Buffer.concat(list[, totalLength])<\/li>\n<li>Buffer.compare(buf1, buf2)<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u09b0\u09bf\u09a6\u0993\u09df\u09be\u09a8 \u09ac\u09bf\u09a8 \u09b6\u09be\u09ae\u09c0\u09ae &nbsp; \u09aa\u09bf\u0989\u09b0 \u099c\u09be\u09ad\u09be\u09b8\u09cd\u0995\u09cd\u09b0\u09bf\u09aa\u09cd\u099f \u0987\u0989\u09a8\u09bf\u0995\u09cb\u09a1 \u09ac\u09be\u09a8\u09cd\u09a7\u09ac \u0995\u09bf\u09a8\u09cd\u09a4\u09c1 \u09ac\u09be\u0987\u09a8\u09be\u09b0\u09bf \u09a1\u09be\u099f\u09be\u09df \u09a4\u09c7\u09ae\u09a8 \u09a8\u09bf\u0996\u09c1\u0981\u09a4 \u09a8\u09df\u0964 \u099f\u09bf\u09b8\u09bf\u09aa\u09bf \u09b8\u09bf\u09b8\u09cd\u099f\u09c7\u09ae \u09ac\u09be \u09ab\u09be\u0987\u09b2 \u09b8\u09cd\u099f\u09cd\u09b0\u09bf\u09ae \u09a8\u09bf\u09df\u09c7 \u0995\u09be\u099c \u0995\u09b0\u09be\u09b0 \u09b8\u09ae\u09df \u0985\u0995\u09cd\u099f\u09c7\u099f \u09b8\u09cd\u099f\u09cd\u09b0\u09bf\u09ae \u09a8\u09bf\u09df\u09a8\u09cd\u09a4\u09cd\u09b0\u09a3\u09c7\u09b0 \u09aa\u09cd\u09b0\u09df\u09cb\u099c\u09a8 \u09b9\u09df\u0964 \u09a8\u09a1 \u09ac\u09be\u09ab\u09be\u09b0 \u0995\u09cd\u09b2\u09be\u09b8 \u09aa\u09cd\u09b0\u09ad\u09be\u0987\u09a1 \u0995\u09b0\u09c7 \u09af\u09be \u0995\u09bf\u09a8\u09be \u09aa\u09c2\u09b0\u09cd\u09a3\u09b8\u0982\u0996\u09cd\u09af\u09be\u09b0 \u0985\u09cd\u09af\u09be\u09b0\u09bf\u09b0 \u09b8\u09a6\u09c3\u09b6 \u2018\u09b0\u2019 \u09a1\u09be\u099f\u09be \u09b8\u0982\u09b0\u0995\u09cd\u09b7\u09a3\u09c7\u09b0 \u09b8\u09c1\u09af\u09cb\u0997 \u09a6\u09c7\u09df \u0995\u09bf\u09a8\u09cd\u09a4\u09c1 \u09ad\u09bf\u09ee \u09b9\u09bf\u09aa\u09c7\u09b0(V8 heap)\u09ac\u09be\u0987\u09b0\u09c7 \u2018\u09b0\u2019 \u09ae\u09c7\u09ae\u09cb\u09b0\u09bf \u098f\u09b2\u09cb\u0995\u09c7\u09b6\u09a8\u09c7\u09b0 \u09b8\u09be\u09a5\u09c7 \u09b8\u09c1\u09b8\u0982\u09b9\u09a4 \u09a5\u09be\u0995\u09c7\u0964 \u09ac\u09be\u09ab\u09be\u09b0 \u0995\u09cd\u09b2\u09be\u09b8 &hellip; <\/p>\n<p><a class=\"more-link btn\" href=\"http:\/\/bangla.sitestree.com\/?p=9963\">Continue reading<\/a><\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[1384],"tags":[1387,1386,1438,1662],"class_list":["post-9963","post","type-post","status-publish","format-standard","hentry","category-----node-js","tag-node-js","tag-1386","tag-1438","tag-1662","item-wrap"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":6367,"url":"http:\/\/bangla.sitestree.com\/?p=6367","url_meta":{"origin":9963,"position":0},"title":"Project Cost Management &#8211; Part 1","author":"Author-Check- Article-or-Video","date":"February 27, 2015","format":false,"excerpt":"\u09aa\u09cd\u09b0\u0995\u09b2\u09cd\u09aa \u09ae\u09c2\u09b2\u09cd\u09af \u09ac\u09cd\u09af\u09ac\u09b8\u09cd\u09a5\u09be\u09aa\u09a8\u09be\u0983 (\u09e7\u09ae \u09aa\u09b0\u09cd\u09ac) \u09b0\u09bf\u09a6\u0993\u09df\u09be\u09a8 \u09ac\u09bf\u09a8 \u09b6\u09be\u09ae\u09c0\u09ae \u09aa\u09cd\u09b0\u0995\u09b2\u09cd\u09aa \u09ae\u09c2\u09b2\u09cd\u09af \u09ac\u09cd\u09af\u09ac\u09b8\u09cd\u09a5\u09be\u09aa\u09a8\u09be\u09b0 \u0995\u09bf\u099b\u09c1 \u09a7\u09be\u09b0\u09a3\u09be \u098f\u0996\u09be\u09a8\u09c7 \u09a6\u09c7\u09df\u09be \u09b9\u09b2\u0964 \u09aa\u09cd\u09b0\u09a5\u09ae\u09c7\u0987 \u0986\u09b2\u09cb\u099a\u09a8\u09be \u0995\u09b0\u09a4\u09c7 \u09b9\u09df \u09ae\u09c2\u09b2\u09cd\u09af \u09ac\u09bf\u09b7\u09df\u0995 \u0995\u09df\u09c7\u0995\u099f\u09bf \u09a7\u09be\u09aa \u09a8\u09bf\u09df\u09c7,\u0995\u09cd\u09b0\u09df\u09ae\u09c2\u09b2\u09cd\u09af, \u09aa\u09cd\u09b0\u0995\u09cd\u09b0\u09bf\u09df\u09be\u09b0 \u0996\u09b0\u099a, \u0995\u09be\u099c \u09b6\u09c7\u09b7 \u09b9\u0993\u09df\u09be\u09b0 \u09aa\u09b0\u09cd\u09af\u09a8\u09cd\u09a4 \u0996\u09b0\u099a \u0987\u09a4\u09cd\u09af\u09be\u09a6\u09bf\u0964 \u00a0 \u09ae\u09c2\u09b2\u09cd\u09af \u09aa\u09cd\u09b0\u0995\u09cc\u09b6\u09b2\u0983 \u0995\u09cb\u09a8 \u09aa\u09cd\u09b0\u0995\u09b2\u09cd\u09aa \u09a5\u09c7\u0995\u09c7 \u0986\u09ae\u09b0\u09be \u09af\u09c7 \u09ac\u09bf\u09b7\u09df \u0997\u09c1\u09b2\u09cb \u0986\u09b6\u09be \u0995\u09b0\u09c7 \u09a5\u09be\u0995\u09bf \u09b8\u09c7 \u0997\u09c1\u09b2\u09cb \u09b9\u09b2, \u0996\u09b0\u099a\u2026","rel":"","context":"In &quot;\u09aa\u09cd\u09b0\u0995\u09b2\u09cd\u09aa \u09a8\u09bf\u09df\u09a8\u09cd\u09a4\u09cd\u09b0\u09a3 \u0964 Project Management (PMP) Basics&quot;","block_context":{"text":"\u09aa\u09cd\u09b0\u0995\u09b2\u09cd\u09aa \u09a8\u09bf\u09df\u09a8\u09cd\u09a4\u09cd\u09b0\u09a3 \u0964 Project Management (PMP) Basics","link":"http:\/\/bangla.sitestree.com\/?cat=187"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":9202,"url":"http:\/\/bangla.sitestree.com\/?p=9202","url_meta":{"origin":9963,"position":1},"title":"\u09a1\u09c7\u099f\u09be \u0995\u09ae\u09bf\u0989\u09a8\u09bf\u0995\u09c7\u09b6\u09a8 \u0993 \u0995\u09ae\u09cd\u09aa\u09bf\u0989\u099f\u09be\u09b0 \u09a8\u09c7\u099f\u0993\u09af\u09bc\u09be\u09b0\u09cd\u0995 : \u09a8\u09c7\u099f\u0993\u09df\u09be\u09b0\u09cd\u0995 \u09b8\u09c1\u0987\u099a\u09bf\u0982 (DCN &#8211; 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