JustinSDK

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JustinSDK

在 The Y Combinator explained with JavaScript 用 JavaScript 程式碼來解釋何謂 Y Combinator，為了更瞭解 Y Combinator，我自己實作了一個，暫記過程如下 ...

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def y(f):
    r = lambda n: f(r)(n)
    return f(r)
    
y(lambda fact: lambda n: 1 if n < 2 else n * fact(n - 1))(3) // 6

JustinSDK

print((lambda n: (lambda f: [f(i, f) for i in range(0, n)]))(10)(lambda n, fib: n if(n == 0 or n == 1) else fib(n - 1, fib) + fib(n - 2, fib)))

JustinSDK

val s="print(\"quine\")";val v="val s=val v=val c=val p=";val c="\\\";";val p="print(v.slice(0,6)+c(1)+s.slice(0,6)+c.slice(0,2)+s.slice(7,12)+c.slice(0,2)+s.last+c.slice(1,3)+v.slice(6,12)+c(1)+v+c.slice(1,3)+v.slice(12, 18)+c(1)+c(0)+c(0)+c(0)+c.slice(1,3)+c.slice(1,3)+v.slice(18, 24)+c(1)+p+c.slice(1,3)+p)";print(v.slice(0,6)+c(1)+s.slice(0,6)+c.slice(0,2)+s.slice(7,12)+c.slice(0,2)+s.last+c.slice(1,3)+v.slice(6,12)+c(1)+v+c.slice(1,3)+v.slice(12, 18)+c(1)+c(0)+c(0)+c(0)+c.slice(1,3)+c.slice(1,3)+v.slice(18, 24)+c(1)+p+c.slice(1,3)+p)

JustinSDK

s="print('quine')";v="s=v=l=p=";l='";\'\\';p="print(v[0,2]+l[0]+s+l[0,2]+v[2,2]+l[0]+v+l[0]+l[1]+v[4,2]+l[2]+l[0,2]+l[3]+l[2]+l[3]+l[3]+l[2]+l[1]+v[6,2]+l[0]+p+l[0]+l[1]+p)";print(v[0,2]+l[0]+s+l[0,2]+v[2,2]+l[0]+v+l[0]+l[1]+v[4,2]+l[2]+l[0,2]+l[3]+l[2]+l[3]+l[3]+l[2]+l[1]+v[6,2]+l[0]+p+l[0]+l[1]+p)

JustinSDK

import static java.lang.System.out;
public class Quine{
  public static void main(String[] args){
    String h="import static java.lang.System.out;\npublic class Quine{\n  public static void main(String[] args){\n";
    String d="String h=String d=String s=String c=";
    String s="\"\\n;}    ";
    String c="    out.println(h+s.substring(5)+d.substring(0,9)+s.charAt(0)+(h.substring(0,35)+s.substring(1,3))+h.substring(36,55)+s.substring(1,3)+h.substring(56,97)+s.substring(1,3)+s.charAt(0)+s.charAt(3));out.println(s.substring(5)+d.substring(9,18)+s.charAt(0)+d+s.charAt(0)+s.charAt(3));out.println(s.substring(5)+d.substring(18,27)+s.charAt(0)+s.charAt(1)+s.charAt(0)+s.charAt(1)+s.charAt(1)+s.substring(2)+s.charAt(0)+s.charAt(3));out.println(s.substring(5)+d.substring(27)+s.charAt(0)+c+s.charAt(0)+s.charAt(3));    out.println(c+s.substring(7)+s.charAt(4)+s.charAt(4));";
    out.println(h+s.substring(5)+d.substring(0,9)+s.charAt(0)+h.substring(0,35)+s.substring(1,3)+h.substring(36,55)+s.substring(1,3)+h.substring

JustinSDK

The Example of JavaScript Essence: Writing an Ajax Library

(function(global) {
    var XD = function(selector, container) {
        return new XD.mth.init(selector, container);
    };
    
    var utils = {
        trim: function(text) {

JustinSDK

The Example of JavaScript Essence: Writing a Style Library

(function(global) {
    var XD = function(selector, container) {
        return new XD.mth.init(selector, container);
    };
    
    var utils = {
        trim: function(text) {

JustinSDK

The Example of JavaScript Essence: Writing an Event Library

(function(global) {
    var XD = function(selector, container) {
        return new XD.mth.init(selector, container);
    };
    
    var utils = {
        trim: function(text) {

JustinSDK

The Example of JavaScript Essence: Writing A DOM Library

(function(global) {
    var XD = function(selector, container) {
        return new XD.mth.init(selector, container);
    };
    
    var utils = {
        trim: function(text) {