kavinyao

<?php
$range_count = array_fill(0, 100, 0);
$start_time = microtime(true);
for($i = 0;$i < 1000000;++$i) {
    $randint = mt_rand(0, 999);
    $range_count[$randint/10]++;
}
$end_time = microtime(true);
$duration1 = $end_time - $start_time;

kavinyao

import java.util.*;

/*
 * Example of Observer Pattern:
 * 	Student is the model
 * 	View1 and View2 display information of the student
 * 	View3 changes information of the student
 * 	Whenever the student is changed, the views displaying it should be updated
 */

kavinyao

import java.util.LinkedList;
import java.util.List;

/*
 * A solution using Proxy Pattern to limited instances problem
 * Requirement:
 * 	class RareResource must have no more than 3 instances at any run time.
 * Note:
 * 	Black magic like reflection is out of consideration as you can never prevent it.
 */

kavinyao

/**
 * What's the average status length in current Fanfou page?
 * Author: @kavinyao
 * MIT-licensed.
 */
(function(document) {
    function map(op, seq) {
        var result = []
        for(var i = 0;i < seq.length;i++)
            result.push(op(seq[i]))

kavinyao

#include <stdio.h>

const char* my_strstr(const char* haystack, const char* needle) {
    if (!*needle)
        return haystack;

    const char* h = haystack;
    const char* n = needle;
    while (*h) {
        const char* hp = h;

kavinyao

for f in (find . -name '*.js')
    head -1 $f | xxd | grep 'efbb bf' > /dev/null
    # if matched a line, $status == 0
    if test $status -eq 0
        echo $f
    end
end

kavinyao

# Demo code in coffeescript for Callbacks are imperative, promises are functional: Node’s biggest missed opportunity
# http://blog.jcoglan.com/2013/03/30/callbacks-are-imperative-promises-are-functional-nodes-biggest-missed-opportunity/

# the original version uses rsvp.Promise
# since I'm a control freak, I'd prefer Deferred
Deferred = require 'deferred'
slice = Array.prototype.slice

# transform a callback-based function to return a promise
# fn == function(param..., function(error, data...))

kavinyao

# This piece of code is a rebound of https://github.com/ForbesLindesay/curry
# Author: Kavin Yao <kavinyao@gmail.com>
# License: MIT
import inspect

def curry(func, num_params=-1):
    """Simple, unlimited curry.
    The curried function is not called until desired number of arguments is passed.
    Note: **kwarg is not supported
    """

kavinyao

import sys
import math
import time


def progress_bar(progress, col_width=80):
    """
    Text progress bar in command line.
    Pre-condition: the cursor is at a new line.
    Post-condition: the cursor is at the end of the same line.

kavinyao

class Node(object):
    """A node in BST."""
    def __init__(self, value, left_node=None, right_node=None):
        self.value = value
        self.left_node = left_node
        self.right_node = right_node

    def set_left(self, left_node):
        self.left_node = left_node