hakobe

function* hello() {
    try {
        while(true) {
            yield 9
            yield 3
            yield 2
        }
    } catch(e) {
        console.log('oops')
    } finally {

hakobe

First, generate .flow file.

$ yarn run flow gen-flow-files --out-dir . greeting.js

Genereted file is almost the same as greeting.js.flow.

Next, run flow and get an error like below.

hakobe

package main

import (
	"io"
	"log"
	"net"
	"time"
)

func reader(r io.Reader) {

hakobe

[error]   (x$1: java.nio.file.Path,x$2: Iterable[_ <: CharSequence],x$3: java.nio.charset.Charset,x$4: java.nio.file.OpenOption*)java.nio.file.Path <and>
[error]   (x$1: java.nio.file.Path,x$2: Array[Byte],x$3: java.nio.file.OpenOption*)java.nio.file.Path
[error]  cannot be applied to (java.nio.file.Path, List[String], java.nio.charset.Charset)
[error]     java.nio.file.Files.write(path, List("hoge"), StandardCharsets.UTF_8)

hakobe

Scala おすすめポイントご紹介

---

おすすめポイント

普段Scalaを使っていて、この機能は便利、よくできていると感じているところをご紹介します。

---

hakobe

use strict;
use warnings;
use utf8;
use v5.20.0;

my $h = {
    hoge => 'hoo',
    fuga => 'foo',
};

hakobe

%lex
%%

\s+                   /* skip whitespace */
"fun"                 return 'FUN'
[0-9]+                return 'INT'
"=>"                  return '=>'
<<EOF>>               return 'EOF'
.                     return 'INVALID'

hakobe

|- let twice = fun f -> fun x -> f (f x) in twice twice (fun x -> x * x) 2 evalto 65536 by E-Let {
    |- fun f -> fun x -> f (f x) evalto ()[fun f -> fun x -> f (f x)] by E-Fun {};
    twice = ()[fun f -> fun x -> f (f x)] |- twice twice (fun x -> x * x) 2 evalto 65536 by E-App {
        twice = ()[fun f -> fun x -> f (f x)]
            |- twice twice (fun x -> x * x) evalto (f = (f = (twice = ()[fun f -> fun x -> f (f x)])[fun x -> x * x])[fun x -> f (f x)])[fun x -> f (f x)] by E-App {
                twice = ()[fun f -> fun x -> f (f x)]
                    |- twice twice evalto (f = ()[fun f -> fun x -> f (f x)])[fun x -> f (f x)] by E-App {
                        twice = ()[fun f -> fun x -> f (f x)] |- twice evalto ()[fun f -> fun x -> f (f x)] by E-Var1 {};
                        twice = ()[fun f -> fun x -> f (f x)] |- twice evalto ()[fun f -> fun x -> f (f x)] by E-Var1 {};
                        f = ()[fun f -> fun x -> f (f x)] |- fun x -> f (f x) evalto (f = ()[fun f -> fun x -> f (f x)])[fun 

hakobe

import sbt._
import Process._
import Keys._
import play.PlayRunHook

object SubProcess {
  def apply(command: String): PlayRunHook = {

    object SubProcessHook extends PlayRunHook {

hakobe

package main

import (
	"io"
	"os"
	"strings"
)

type rot13Reader struct {
	r io.Reader