Example Detailed Description Function

Content: Normal functions, anonymous functions, how function delivery makes HTTP server work

###Normal Functions

example:

function say(word) {
 (word);
}
function execute(someFunction, value) {
 someFunction(value);
}
execute(say, "Hello");
###Anonymous Functionsfunction execute(someFunction, value) {
 someFunction(value);
}
execute(function(word){ (word) }, "Hello");

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How does function pass make HTTP server work

With this knowledge, let’s take a look at our simple but not simple HTTP server:

var http = require("http");
(function(request, response) {
 (200, {"Content-Type": "text/plain"});
 ("Hello World");
 ();
}).listen(8888);

Now it should look much clearer: we passed an anonymous function to the createServer function.

The same purpose can be achieved using such code:

var http = require("http");
function onRequest(request, response) {
 (200, {"Content-Type": "text/plain"});
 ("Hello World");
 ();
}
(onRequest).listen(8888);

Summarize

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