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Normal code block:

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var http = require('http');
http.createServer(function (req, res) {
  res.writeHead(200, {'Content-Type': 'text/plain'});
  res.end('Hello World\n');
}).listen(1337, '127.0.0.1');
console.log('Server running at http://127.0.0.1:1337/');

Code block:

Javascript Array Syntax MDN Documentation
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var arr1 = new Array(arrayLength);
var arr2 = new Array(element0, element1, ..., elementN);

jsFiddle:

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