Downgrade npm to v4 for developing React Native

Run next command.

npm install -g npm@4

Bluetooth keyboard shortcut on iOS 11

Spotlight search.

CMD + Space

Change keyboard language.

CTRL + Space

Go to home.

CMD + H

Volume up/down.

F12/F13

Mute Volume.

F11

Align center tab in Ant Design

Add next style option to the tab component.

tabBarStyle={{textAlign: 'center'}}

100% height in Ant Design

In ant design you want to 100% height of some component.
Add next style option.

style={{height:"100vh"}}

Add permanently ssh key on macOS

Run next command.

ssh-add -K ~/.ssh/[YOUR_PRIVATE_KEY]

Add config file in "~/.ssh/" with next contents.

Host github.com
    HostName github.com
    User enzinier
    PreferredAuthentications publickey
    IdentityFile /Users/jason/.ssh/enzinier-GitHub
    AddKeysToAgent yes
    UseKeychain yes

Key option is AddKeysToAgent, UseKeychain.

Debugging react app with Jetbrain WebStorm

If you try debugging react app with JetBrains WebStorm, you nothing to do.
For debugging you must install JetBrains IDE Support chrome extension.
JetBrains IDE Support

Get parameter from url

function getUrlParameter(paramName) {
    var currentUrl = window.location.search.substring(1);
    var urlParams = currentUrl.split("&");
    for (var i = 0; i < urlParams.length; i++) {
        var paramNames = urlParams[i].split("=");
        if (paramNames[0] == paramName) {
            return paramNames[1];
        }
    }
}

Permission denied issue on yarn global package

Unlike npm, location of global package on yarn is "/usr/bin" as default.
Therefore running yarn command without sudo occur to deny permission.
Avoid this situation, follow next instruction.

Check your default bin location of yarn.

yarn global bin

Create new directory in your favorite location.

mkdir ~/.yarn/global

Change default bin location of yarn.

yarn config set prefix ~/.yarn/global

And add path as environment variable in "~/.bashrc".

export PATH=${PATH}:`yarn global bin`

ref. https://github.com/yarnpkg/yarn/issues/2108

Ubuntu | "/sbin/ldconfig.real: /usr/lib/nvidia-375/libEGL.so.1 is not a symbolic link"

Run next commands.

sudo mv /usr/lib/nvidia-375/libEGL.so.1 /usr/lib/nvidia-375/libEGL.so.1.org
sudo mv /usr/lib32/nvidia-375/libEGL.so.1 /usr/lib32/nvidia-375/libEGL.so.1.org
sudo ln -s /usr/lib/nvidia-375/libEGL.so.375.39 /usr/lib/nvidia-375/libEGL.so.1
sudo ln -s /usr/lib32/nvidia-375/libEGL.so.375.39 /usr/lib32/nvidia-375/libEGL.so.1

ref. https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-375/+bug/1662860

"The user limit on the total number of inotify watches was reached"

This error reach a system limit on the number of files you can monitor.
See your current system limit.

cat /proc/sys/fs/inotify/max_user_watches

You can temporarily change limit with next command.

sudo sysctl fs.inotify.max_user_watches=524288
sudo sysctl -p

Also you can permanently change limit with next command.

echo fs.inotify.max_user_watches=524288 | sudo tee -a /etc/sysctl.conf
sudo sysctl -p

ref. https://github.com/guard/listen/wiki/Increasing-the-amount-of-inotify-watchers

Create shortcut for running specific android virtual device.

copy and paste to other file in neovim

Open source file and press A key for select range.
Then press "+yy.
Open destination file and press "+p at your favorite location.

How to add shortcut in launcher on Ubuntu 16.04 LTS

Shortcut files of launcher are placed in ~/.local/share/applications.
Create .desktop file to reference next code.

ref. https://help.ubuntu.com/community/UnityLaunchersAndDesktopFiles

Silently install Java on Ubuntu

How to setup GKE?

I'm usually manage google cloud command in Postman.
Follow next orders.

1. Create own network.

   curl -X POST -H "Content-Type: application/json" -H "Authorization: {{Your Access Token}}" -H "Cache-Control: no-cache" -d '{
     "name": "{{Your Network Name}}",
     "description": "{{Your Network Description}}",
     "autoCreateSubnetworks": false
   }' "https://www.googleapis.com/compute/v1/projects/{{Your Project ID}}/global/networks"

2. Create subnetwork.

   curl -X POST -H "Content-Type: application/json" -H "Authorization: {{Your Access Token}}" -H "Cache-Control: no-cache" -d '{
     "ipCidrRange": "10.10.0.0/20",
     "name": "asia-east1",
     "network": "https://www.googleapis.com/compute/v1/projects/{{Your Project ID}}/global/networks/{{Your Network Name}}"
   }' "https://www.googleapis.com/compute/v1/projects/{{Your Project ID}}/regions/asia-east1/subnetworks"

3. Create cluster in GKE.

   curl -X POST -H "Content-Type: application/json" -H "Authorization: {{Your Access Token}}" -H "Cache-Control: no-cache" -H "Postman-Token: bc7eddb2-be25-29f6-9af4-be948e1519b6" -d '{
     "cluster": {
       "name": "{{Your Cluster Name}}",
       "zone": "asia-east1-a",
       "network": "{{Your Network Name}},
       "loggingService": "logging.googleapis.com",
       "monitoringService": "none",
       "description": "{{Your Cluster Description}}",
       "subnetwork": "asia-east1",
       "nodePools": [
         {
           "initialNodeCount": 1,
           "config": {
             "machineType": "n1-standard-2",
             "imageType": "GCI",
             "diskSizeGb": 100,
             "localSsdCount": 1,
             "oauthScopes": [
               "https://www.googleapis.com/auth/compute",
               "https://www.googleapis.com/auth/devstorage.read_write",
               "https://www.googleapis.com/auth/bigquery",
               "https://www.googleapis.com/auth/sqlservice.admin",
               "https://www.googleapis.com/auth/datastore",
               "https://www.googleapis.com/auth/logging.write",
               "https://www.googleapis.com/auth/monitoring.write",
               "https://www.googleapis.com/auth/bigtable.data",
               "https://www.googleapis.com/auth/servicecontrol",
               "https://www.googleapis.com/auth/service.management.readonly",
               "https://www.googleapis.com/auth/trace.append"
             ]
           },
           "autoscaling": {
             "enabled": false
           },
           "management": {
             "autoUpgrade": false,
             "autoRepair": false,
             "upgradeOptions": {}
           },
           "name": "{{Your Pool Name}}"
         }
       ],
       "masterAuth": {
         "username": "admin"
       }
     }
   }' "https://container.googleapis.com/v1/projects/{{Your Project ID}}/zones/asia-east1-a/clusters"

4. Get credential of cluster.

   gcloud container clusters list

   gcloud config set container/cluster {{Your Cluster Name}}

   gcloud config set compute/zone {{Your Zone ID}}

   echo "export GOOGLE_APPLICATION_CREDENTIALS={{Your Key File Address}}" >> ~/.bash_profile

   gcloud container clusters get-credentials {{Your Cluster Name}}

mysql data directory error on kubernetes.

If you meet next error...

[ERROR] --initialize specified but the data directory has files in it. Aborting.

You should add next argument in recipe.

spec:
  containers:
  - name: db-mysql
    image: mysql:5.7
    args: ["--ignore-db-dir=lost+found"]

Private docker registry on kubernete recipe

Encrypt docker config to base64.

cat ~/.docker/config.json | base64

Add encrypted data to data element.

apiVersion: v1
kind: Secret
metadata:
  name: docker-config
type: kubernetes.io/dockerconfigjson
data:
  .dockerconfigjson: ewoJI...

Refer docker-config as same level with container in deployment.

imagePullSecrets:
  - name: docker-config

Can't see console log of react native in nuclide.

Go to nuclide setting and change value of "Tag to include" to "^(.*)$" like this.

ref. https://github.com/facebook/nuclide/issues/899

Connect to localhost inside docker

If your service inside docker want to connect to localhost, you can attach next option.

docker run --net="host"

Install KakaoTalk on Ubuntu 16 LTS

Run next command.
sudo apt-get install wine playonlinux fonts-nanum*

Run playonlinux and click Install menu.
Select "Install a non-listed program"

Keep clicking Next button.
Select "Install a program in a new virtual drive" and click next button.

Type name of virtual drive anything.

Check option like next screenshot.

Select option "32 bits windows application".
Check next libraries.

• POL_Install_gdiplus
• POL_Install_gecko (For korean font)
• POL_install_riched30 (For korean font)
• POL_install_wmp10 (For alert)
• POL_install_wmpcodecs (For alert)

Then keep going click next button.
Don't check "Run kakaotalk".
In last, you can create shortcut for kakaotalk application.

Google Storage By Java

If you were deleted all files in folder then folder also deleted.

final Storage storage = StorageOptions.getDefaultInstance().getService();
boolean succeed = storage.delete(BlobId.of("bucket-name", "1/lenna.jpg"));
if (succeed) {
  // File was deleted.
}
else {
  // File not found!
}

ref. https://cloud.google.com/appengine/docs/flexible/java/using-cloud-storage

Google Cloud Authorization

Environment: OS X El Capitan

Use default credential or google cloud authorization.

Install google-cloud-sdk.

brew cask install google-cloud-sdk

Authorize google cloud.

gcloud auth application-default login

ref. https://developers.google.com/identity/protocols/application-default-credentials