kyrylo

Constant lookup in Ruby can happen lexically or through the ancestry tree of the receiver(a class or module). You can identify which lookup rules are being applied by the context you're in or by the syntax being used to define a class or module.

A class body that is defined as class A::B::C; …; end will lookup constants through the ancestry tree when a constant is evaluated in its class body. Anytime you see A::B::C being used as syntax to define a class or lookup the value of a constant the ancestry tree is being used for the lookup.

kyrylo

fn main() {
    let mut notifier = Notifier::new();
    notifier.add_filter(|n| n.incr_count(1));
    notifier.add_filter(|n| n.incr_count(1));
    
    let mut notice = Notice::new();
    
    println!("Before: {:#?}", notice);
    notifier.notify(&mut notice);
    println!("After:  {:#?}", notice);

kyrylo

package main

import (
	"database/sql"
	"encoding/json"
	"flag"
	"fmt"
	"io/ioutil"
	"log"
	"net/http"

kyrylo

~% time pry -e exit
pry -e exit  0.47s user 0.06s system 99% cpu 0.540 total
~% 
~% pry --installed-plugins
Installed Plugins:
--
coolline          Live syntax-highlighting for the Pry REPL
debugger          Fast debugging with Pry.
debundle          Allows you to use gems not in your Gemfile from Pry.
doc               Provides YARD and extended documentation support for Pry

kyrylo

In chronological order:

• http://zyalt.livejournal.com/982589.html
• http://zyalt.livejournal.com/982980.html
• http://zyalt.livejournal.com/983424.html
• http://zyalt.livejournal.com/983675.html
• http://zyalt.livejournal.com/984246.html
• http://zyalt.livejournal.com/984379.html

kyrylo

/*
 * By default, `eval` evaluates code in the current context.
 */
var x = 0;

function foo() {
  var x = 5;
  eval('x = 100');
  return x;
}

kyrylo

% ./b-fun 
vertex shader: compilation error: 0:1(10): error: GLSL 4.00 is not supported. Supported versions are: 1.10, 1.20, and 1.00 ES


tess control: compilation error: 0:1(10): error: GLSL 4.00 is not supported. Supported versions are: 1.10, 1.20, and 1.00 ES


tess eval: compilation error: 0:1(10): error: GLSL 4.00 is not supported. Supported versions are: 1.10, 1.20, and 1.00 ES

kyrylo

16:15     →   m4dm4n (~m4dm4n@gateway/tor-sasl/nongeek) has joined ##c
16:15  *   m4dm4n hello everybody 
16:15  m4dm4n   excuse me, How can I find a C developer?
16:16  oleo     by poking them with a needle!
16:16  oleo     lol
16:16  ManDay   by making a comment about c++ being a nice language
16:16  ManDay   that will surely stirr them up
16:18  Gentle   m4dm4n: produce a segfault and stare at the monitor, showing
                both the code and the output. If you manage to stay completely
                still long enough, they will crawl out of their holes, gather

kyrylo

#include <stdio.h>
#include <string.h>

struct foo { char name[32]; };

int main(void)
{
	char tempstr[32];
	struct foo strings[8];

kyrylo

#include <stdio.h>

struct foo { char *name; };

int main(void)
{
	char tempstr[32];
	struct foo strings[8];

	for (int i = 0; i < 8; i++) {