Examples for 1.5

Author: samerbuna

1.5/StringDecoder.js

@@ -0,0 +1,13 @@
+const { StringDecoder } = require('string_decoder');
+const decoder = new StringDecoder('utf8');
+
+process.stdin.on('readable', () => {
+  const chunk = process.stdin.read();
+  if (chunk != null) {
+    const buffer = Buffer.from([chunk]);
+    console.log('With .toString():', buffer.toString());
+    console.log('With StringDecoder:', decoder.write(buffer));
+  }
+});
+
+// 0xE2, 0x82, 0xAC -> €

1.5/buff.slice.js

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+const fs = require('fs');
+
+const conversionMap = {
+  '88': '65',
+  '89': '66',
+  '90': '67',
+};
+
+fs.readFile(__filename, (err, buffer) => {
+  let tag = buffer.slice(-4, -1);
+
+  for(let i=0;i < tag.length; i++) {
+    tag[i] = conversionMap[tag[i]];
+  }
+
+  console.log(buffer.toString());
+});
+
+// TAG: XYZ

1.5/buffer.js

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+const string = 'touché';
+const buffer = Buffer.from('touché');
+
+console.log(string, string.length);
+console.log(buffer, buffer.length);

1.5/index.js

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+// instead of
+
+process.env.PORT
+
+// read from a config utility
+
+const { config } = require('./util');
+
+config.port

1.5/process.js

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+// process is an event emitter
+
+process.on('exit', (code) => {
+  // do one final synchronous operation
+  // before the node process terminates
+
+  console.log(`About to exit with code: ${code}`);
+});
+
+process.on('uncaughtException', (err) => {
+  // something went unhandled.
+  // Do any cleanup and exit anyway!
+
+  console.error(err); // don't do just that.
+
+  // FORCE exit the process too.
+  process.exit(1);
+});
+
+// keep the event loop busy
+process.stdin.resume();
+
+// trigger a TypeError exception
+console.dog();

1.5/util.js

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+export const config = {
+  port: process.env.PORT || 8080
+};