koher

import java.util.Arrays;
import java.util.List;

interface Integer {
    int getValue();
}

final class ConcreteInteger implements Integer {
    private final int value;
    ConcreteInteger(int value) { this.value = value; }

koher

print("Hello Swift!")

koher

import java.util.*;

import java.io.PrintStream;

public class CollectionsPerformance {
    public static void main(String[] args) {
        final PrintStream out = System.out;
        final int n = 100000;
        final Integer x = 42;

koher

extension Dictionary {
    func filterMap<T>(_ transform: (Value) -> T?) -> [Key: T] {
        var transformed = [Key:T]()
        for entry in self {
            if let newValue = transform(entry.value) {
                transformed[entry.key] = newValue
            }
        }
        return transformed
    }

koher

// Swift 2.2
import XCTest
import Foundation
import RealmSwift

private let n = 100000
private let numberOfLoops = 1000

class RealmPerformanceTest: XCTestCase {
    func testIndexedFilterPerformance() {

koher

print("Hello, WWDC!")
Hello love at first swipe.
Hello other side of the road.
Hello yogi on my wrist.
Hello driver, fast as you can.
Hello workout in my living room.
Hello every pitch, every highlight.
Hello self-combusting selfies.
Hello double tap heart.
Hello rain in five minutes.

koher

# coding:utf-8

import tensorflow as tf
from random import choice

zun = -1.0
doko = 1.0
zun_length = 4
zundoko_length = zun_length + 1

koher

throws as returning a Result

I think it would be great if throws -> Foo were a syntactic sugar of -> Result<Foo>. Without affecting existing codes, it makes it possible to go back and forth between Manual Propagation and Automatic Propagation seamlessly.

// I wish if the first `makeFoo` were
// a syntactic sugar of the second one
func makeFoo(x: Int) throws -> Foo {
  guard ... else {
 throw FooError()

koher

That was my misunderstanding especially about subtyping of value types.

koher

import java.util.*;

Map<String, Integer> map = new TreeMap();
map.put("abc", 123);
map.put("def", 456);
map.put("ghi", 789);

map.get("abc");
map.get(123); // java.lang.ClassCastException: java.lang.String cannot be cast to java.lang.Integer