gogojimmy

1. 一般 Hash 情況是這樣：

hash = {}
hash[:foo][:bar] = :hello
=> NoMethodError: undefined method `[]=' for nil:NilClass

請建立一個 Hash 可以不管 key 值是否存在都可以自動設定 key 及 value

gogojimmy

Keybase proof

I hereby claim:

• I am gogojimmy on github.
• I am gogojimmy (https://keybase.io/gogojimmy) on keybase.
• I have a public key whose fingerprint is C0D6 893D 457D 006D 8477 C54A CE06 8843 E498 948F

To claim this, I am signing this object:

gogojimmy

#!/bin/bash

# Checking whether user has enough permission to run this script
sudo -n true
if [ $? -ne 0 ]
    then
        echo "This script requires user to have passwordless sudo access"
        exit
fi

gogojimmy

Keybase proof

I hereby claim:

• I am gogojimmy on github.
• I am gogojimmy (https://keybase.io/gogojimmy) on keybase.
• I have a public key ASAMM3jBSqi6zARbdKQRGgUz71W22cGm4Noba0KNQ5b2mQo

To claim this, I am signing this object: