nephilim / projecteuler10.scala

Last active December 18, 2015 13:29

Project Euler 10: Summation of Primes

	package ysl.p10

	object PrimeSum extends App {
	def naturals(from: Int): Stream[Int] =
	Stream.cons(from, naturals(from + 1))
	def sieve(s: Stream[Int]): Stream[Int] =
	Stream.cons(s.head, sieve(s.tail filter { _ % s.head != 0 }))
	def primes = sieve(naturals(2).takeWhile( _ < 2000000))
	// TODO: ...
	}

nephilim / projecteuler09.scala

Created June 16, 2013 01:01

Project Euler 09: Special Pythagorean Triplet

	package ysl.p09

	object Pythagorean extends App {
	// presume a > b > c
	var count = 0;
	for {
	i <- 3 to 500
	j <- 2 until i
	k <- (i-j) to j
	if (j + k) > i // in triangle, 'a < b + c' is a geometrical axiom.

nephilim / projecteuler05.scala

Last active December 17, 2015 11:59

Project Euler 05: Smallest Multiple

	package ysl.p05

	object SmallestMultple {
	def discompose(n:Int):List[Int] = n match {
	case 1 => Nil
	case _ => {
	val process = List.range(2,n +1).dropWhile( n % _ != 0)
	val dividen = process.head
	dividen :: discompose(n / dividen)
	}

nephilim / gist:5428154

Last active December 16, 2015 11:29

Project Euler 02: Even Fibonacci numbers

	object Fibonacci extends App {
	val fibonacci: Stream[Int] = Stream.cons(
	1,
	Stream.cons(2,
	fibonacci.zip(fibonacci.tail).map(
	zipped => zipped._1 + zipped._2)))
	println(fibonacci.takeWhile(_ < 4000000).filter(_ % 2 == 0).sum)
	}

nephilim / gist:5428120

Last active December 16, 2015 11:29

Project Euler 01: Multiples of 3 and 5

	package ysl.p01

	object Multiples extends App{
	val naturalNumber: Stream[Int] = Stream.cons(1, naturalNumber.map(_ + 1))
	val filtered = naturalNumber.filter(x => (x % 3 == 0 \|\| x % 5 == 0))
	println(filtered.takeWhile(_ < 1000).sum)
	}

nephilim / schonfinkelize-method.py

Created February 19, 2013 00:58

	# -- coding=utf-8 --
	__author__ = 'nephilim'


	def curry(func, args, *kwargs):
	"""
	객체 생성 후 다음과 같이 p의 메서드에 대해 커링을 시도
	>>> p = Person()
	>>> p.name
	'lee'

nephilim / schonfinkelize-methods.js

Last active December 13, 2015 21:19

Created to demonstrate one of possible problems with a sample code in chapter four of the book Javascript Patterns. For more information, refer to an example on page 100 of the book

	function curry(fn) {
	var slice = Array.prototype.slice;
	var args = slice.call(arguments);

	// curry.call(obj)의 형태로 호출했을 경우
	var self = this;

	if (typeof(args[0]) != "function") {
	// 예외 처리
	throw { name: "ArgumentException",

nephilim / memoization-with-anonymous-func.js

Last active December 13, 2015 18:09

Created to demonstrate one of possible problems with a sample code in chapter four of the book Javascript Patterns. For more information, refer to an example on page 92 of the book.

	var func = function() {
	if ( !func.cache ) {
	console.log("cache initialized @" + new Date());
	func.cache = "complex result";
	}
	return func.cache;
	};

	var func2 = func;

nephilim / scala-competition-spec.scala

Created May 13, 2012 05:29

ScalaTest Spec for 20120513 Lasdan Competition

	package pis.chap22.multimap
	import org.junit.runner.RunWith
	import org.scalatest.Spec
	import org.scalatest.junit.JUnitRunner

	@RunWith(classOf[JUnitRunner])
	class LasMultiMapSpec extends Spec {

	describe("정의한 LasDan MultiMap의 기본 동작을 확인한다") {
	it ("기본 동작") {

nephilim / la-o-dan-s3-noti.markdown

Created July 9, 2011 07:00

라오단 3기 시작 공지

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첫 모임을 다음 주 토요일(7월 16일)에 할 예정입니다. 새로운 시작에 앞서 몇 가지 내용을 공유합니다.

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이전 시즌에 대한 내용을 요약하면 다음과 같습니다

Dongwook Lee nephilim

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