bishboria

These links no longer work. Springer have pulled the free plug.

Graduate texts in mathematics

duplicates = multiple editions

A Classical Introduction to Modern Number Theory, Kenneth Ireland Michael Rosen

A Classical Introduction to Modern Number Theory, Kenneth Ireland Michael Rosen

grugq

Simple Security Guidelines

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• Use an iPod or an iPad without a SIM card
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kristopherjohnson

// Given array of 2-tuples, return two arrays
func unzip<T, U>(array: [(T, U)]) -> ([T], [U]) {
    var t = Array<T>()
    var u = Array<U>()
    for (a, b) in array {
        t.append(a)
        u.append(b)
    }
    return (t, u)
}

mattt

// See: https://devforums.apple.com/message/1000934#1000934

import Foundation

// Logic

operator prefix ¬ {}
@prefix func ¬ (value: Bool) -> Bool {
    return !value
}

jpsim

//
//  JAZMusician.h
//  JazzyApp
//

#import <Foundation/Foundation.h>

/**
 JAZMusician models, you guessed it... Jazz Musicians!
 From Ellington to Marsalis, this class has you covered.

schani

struct MySet<KeyType : Hashable> : Sequence, ArrayLiteralConvertible
{
    var dictionaryOfItems = Dictionary<KeyType,Bool>()
    typealias GeneratorType = MapSequenceGenerator<Dictionary<KeyType, Bool>.GeneratorType, KeyType>
    
    init() {}
    init(array: KeyType[]) {
        for item in array {
            self.dictionaryOfItems.updateValue(true, forKey: item)
        }

Set.swift

import Swift

struct SetGenerator<T : Hashable> : Generator {
    var dictGenerator : DictionaryGenerator<T, Void>
    
    init(_ d : Dictionary<T,Void>) {
        dictGenerator = d.generate()
    }
    

algal

//
// Set
//

struct MySet<KeyType : Hashable> : Sequence
{
  var dictionaryOfItems = Dictionary<KeyType,Bool>()
  
  init() {}
  init(array:Array<KeyType>) {

calebd

extension Array {
    
    func first() -> Element? {
        if isEmpty {
            return nil
        }
        return self[0]
    }
    
    func last() -> Element? {