YusukeHosonuma

// すべてがtrueか？
boolean flag = true;
for (boolean bit : bits) flag &= bit;

// 1つでもtrueか？
boolean flag = false;
for (boolean bit : bits) flag |= bit;

YusukeHosonuma

if ([someString length] > 0) { // 0が偽なのでnilチェックは不要
}

YusukeHosonuma

#define IS_EMPTY(s) ((s == nil) || ([s length] == 0))

NSString *emptyString = @"";
NSString *nilString   = nil;
NSString *someString  = @"foo";

// nilまたは空文字列でないかチェックする
NSLog(@"%@", !IS_EMPTY(emptyString) ? @"YES" : @"NO");
NSLog(@"%@", !IS_EMPTY(nilString)   ? @"YES" : @"NO");
NSLog(@"%@", !IS_EMPTY(someString)  ? @"YES" : @"NO");

YusukeHosonuma

#import "NSString+Additions.h"

@implementation NSString (Additions)

- (BOOL)isNotEmpty {
    return [self length] > 0;
}

@end

YusukeHosonuma

let old = 17
let foo = "I am \(old) old years."

YusukeHosonuma

import java.util.stream.Stream;

public class FizzBuzzSample {

    public static void main(String[] args) {

        // Stream.iterateを使用して自然数（の無限数列）のストリームを用意
        Stream<Integer> naturalNumbers = Stream.iterate(1, integer -> integer + 1);

        // 自然数（の無限数列）をfizzBuzzメソッド（参照）を利用して文字列のストリームに変換

YusukeHosonuma

import UIKit

extension Array {
    func forEach(f: T -> ()) {
        for n:T in self {
            f(n)
        }
    }
}

YusukeHosonuma

let p = Person(name: "Yusuke Hosonuma")
Mirror(reflecting: p).children.forEach {
  print("\($0.label!), \($0.value)")
}

YusukeHosonuma

//
//  ViewController.swift
//  APISample
//
//  Created by Yusuke on 11/8/15.
//  Copyright © 2015 Yusuke. All rights reserved.
//

import UIKit

YusukeHosonuma

//
//  SampleAPI.swift
//  APISample
//
//  Created by Yusuke on 11/8/15.
//  Copyright © 2015 Yusuke. All rights reserved.
//

import Foundation