bion

/*
  in functions evaluated 'anonymously', that is without a reference to an object,
  the 'this' keyword will reference the global object. in a web page that will end
  up being 'Window', in node it will be the node process itself.

  'this.number' will be undefined here because the global object has no property called 'number'
*/
var one = function() {
    console.log(this.number + ": 'this' referenced inside bare function binds to the global object:", this);
};

bion

#!/bin/bash

portnum=3001

sudo fuser $portnum/tcp 2>1 |
    cut -f 1 |
    tr -s ' ' '\n' |
    sed 1d |
    while read -r pid; do
      sudo cat /proc/$pid/comm

bion

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

bion

class Foo
  def double_then_yield(num, &block)
    block.call(num * 2)
  end
end

foo = Foo.new

result = foo.double_then_yield 5 do |num|
  num + 1

bion

CFLAGS=-g -02 -Wall -Wextra -Isrc -rdynamic -DNDEBUG $(OPTFLAGS)
LIBS=-ldl $(OPTLIBS)
PREFIX?=/usr/local

SOURCES=$(wildcard src/**/*.c src/*.c)
OBJECTS=$(patsubst %.c,%.o,$(SOURCES))

TEST_SRC=$(wildcard tests/*_tests.c)
TESTS=$(patsubst %.c,%,$(TEST_SRC))

bion

// should load all the files in a given dir, and then return an 
// event (basically a dictionary) with keys as filenames and
// values as whatever the loaded file returned.
// in this case, each file returns a lambda that takes two args
var gestureLibrary = ~dirToEvent.value(~baseDir ++ "/gestures");

// actually returns an empty event because the sclang interpreter
// is easily confused about its pwd
gestureLibrary.postln; // => ( )

bion

#include <math.h>

#define PI 3.14159265358979323846

int sinetable(double **table, double frequency, int sample_rate) {
  int i = 0;
  double phase = 0;
  double cycles_per_frame = frequency / sample_rate;
  int frames_per_cycle = (int) (1 / cycles_per_frame);
  double phase_increment = cycles_per_frame * 2 * PI;

bion

var fs = require('fs');
var files = fs.readdirSync("./test");
var everybody = "";
var doneCount = files.length;
var i;

for (i = 0; i < files.length; ++i) {
  fs.readFile("./test/" + files[i], function(err, data) {
    if (err != null) throw new Error(err);

bion

#include <iostream>
#include <deque>

template<typename T>
std::deque< std::deque<T> >&&
cartesian_product(std::deque< std::deque<T> > &bags) {
  std::deque< std::deque<T> > output{std::deque<T>{}};

  if (!bags.size())
    return std::move(output);

bion

#include <iostream>
#include <vector>

template<typename T>
T my_func(typename std::vector<T>::iterator begin) {
  return *begin;
}

int main() {
  std::vector<int> v{1, 2};