2020 ~ trouble shooting,memo

2020/11/16

2020/11/16

rails

Webpacker can't find application.js

これはwebpackerがコンパイル*されていないことが原因です。

なので下記のコマンドで解決しました。

rails webpacker:install

rails webpacker:compile

2020/10/21

2020/10/21

git

Personal access tokens

-->https://github.com/settings/tokens

$ git clone https://github.com/private-organization/repository.git
Cloning into 'repository'...
Username for 'https://github.com': xxx
Password for 'https://xxx@github.com': {ここでGitHubのパスワードでなくtokenを入力する}

2020/10/17

2020/10/17

ruby

fatal error: 'libpq-fe.h' file not found

libpq-fe.h が見当たらないらしい。

次のコマンドで postgresql をインストールすることで解決。

libpqはpostgresqlのことだね

brew install postgresql

2020/10/16

2020/10/16

golang

golang sha256

package main

import (

"fmt"
"crypto/sha256"
)

func main() {

//saltで値変わるね

salt:="test"
hash := hmac.New(sha256.New, []byte("1"))

hash.Write([]byte(salt))
fmt.Printf("%x\n", hash.Sum(nil))

}

mac のshasumで無理かな？
goplaygroud でやりました。

2020/10/13

2020/10/13

node, ruby

rbenv nodenv

// 1.初期化設定
$ echo 'eval "$(rbenv init -)"' >> ~/.bash_profile
// 2.初期化設定の反映（既存のRubyはこれで無視される）
$ source ~/.bash_profile
// 3.rbenvのインストール：
$ brew install rbenv ruby-build
// 4.インストール可能なRubyのバージョン一覧の表示
$ rbenv install -l
// 5.指定したRubyのバージョンをインストール
$ rbenv install 2.3.5
// 6.インストールしたRubyを使用可能な状態にする⇒shimsへの反映
$ rbenv rehash

全く同じ手順で　nodenvをインストールできる

2020/09/28

2020/09/28

mac, net

2020/05/29

2020/05/29

golang

golang var is nil

package main

import (
"fmt"
)

func main() {
var stringArr []string

//true
fmt.Println(stringArr==nil)

// zero
fmt.Println(len(stringArr))
}

make([]string,0) is not nil, len is zero

2020/04/08

2020/04/08

vue

Vue.js Upload file using axios

<input type="file" @change="onFileChanged">
<button @click="onUpload">Upload!</button>

We now need the two handler methods in our Vue component:

methods: {
  onFileChanged (event) {
    const file = event.target.files[0]
  },
  onUpload() {
    // upload file
  }

Send as binary data

onUpload() {
  axios.post('my-domain.com/file-upload', this.selectedFile)
}

Send as FormData

onUpload() {
  const formData = new FormData()
  formData.append('myFile', this.selectedFile, this.selectedFile.name)
  axios.post('my-domain.com/file-upload', formData)
}

Show upload progress

In both cases, you can also output the upload progress if you want to.

uploadHandler = () => {
  ...
  axios.post('my-domain.com/file-upload', formData, {
    onUploadProgress: progressEvent => {
      console.log(progressEvent.loaded / progressEvent.total)
    }
  })
}

2020/04/07

2020/04/07

node

Usage:
nodebrew help Show this message
nodebrew install <version> Download and install <version> (from binary)
nodebrew compile <version> Download and install <version> (from source)
nodebrew install-binary <version> Alias of `install` (For backword compatibility)
nodebrew uninstall <version> Uninstall <version>
nodebrew use <version> Use <version>
nodebrew list List installed versions
nodebrew ls Alias for `list`
nodebrew ls-remote List remote versions
nodebrew ls-all List remote and installed versions
nodebrew alias <key> <value> Set alias
nodebrew unalias <key> Remove alias
nodebrew clean <version> | all Remove source file
nodebrew selfupdate Update nodebrew
nodebrew migrate-package <version> Install global NPM packages contained in <version> to current version
nodebrew exec <version> -- <command> Execute <command> using specified <version>

2020/01/18

2020/01/18

rails

rails string

"test".length
=>4

"t est".strip
=>test

"test".slice(1..2)
=>es

2020/01/11

2020/01/11

rails

rails ||=

@user
=>nil
@user = @user || "user1"
=>user1
@user = @user || "user2"
=>user2

2020/01/05

2020/01/05

web

local dns ngrok

./ngrok http 3000

trouble shooting,memo