Enter the code below in terminal, and then enter your password to grant permission: sudo xcode-select -s /Applications/Xcode.app/Contents/Developer
How to use two ssh keys to access two different GitHub account.
I tried to use two ssh keys for my two GitHub accounts, one for my personal account, one for my school account. However, I screwed the ssh credential for GitHub verification. When I tried to use my personal account to push my code, I got permission denied A-account@git.com to B-account. I took some time searching …
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How to install tensorflow on Mac and use it in Pycharm
How to install TensorFlow on Mac Chck if you have intalled pip pip3 install tensorflow using pip3 pip3 install tensorflow check tensorflow version pip3 show tensorflow How to set TensorFlow in Pycharm Click file -> New Project Setting -> Preference Choose Python interpreter Click the plus sign on the left bottom Search for tensorflow and …
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Generics in Java
Generics mean parameterized types. The idea is to allow type (Integer, String, … etc, and user-defined types) to be a parameter to methods, classes, and interfaces. Using Generics, it is possible to create classes that work with different data types. For example: // A Simple Java program to show working of user defined // Generic …
How to deploy your first smart contract on Ethereum
1. Use Remix First we naviagete to the Remix. And then we can create a new workspace and add a new file from left part interface. 2. Edit the file we added. I will use the code below as a simple demo. // SPDX-License-Identifier: MIT pragma solidity >=0.5.17; // We define a contract with the …
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How to launch your own ICO in Ethereum?
1.First install and register your wallet. For example, I use MetaMask. 2. Send test ETH to our wallet. We don’t need to use our real ETH, so don’t worry. Just copy your wallet address to this link. You can get 1 ETH each 24 hours. 3. Token Code. Ethereum tokens comply with ERC-20, you can …
Use youtube-dl to download 1080P video with audio
Today I used youtube-tl to download videos from YouTube. Because of networking traffic it took me some time to finish, however, video downloaded successfully. But when I open the video then I notice the audio file not be downloaded simultaneously. Here is a way to fix this problem: youtube-dl -f 137+bestaudio –merge-output-format mkv youtube_url
How to build VPN using Shadowsocks
Purchase a VPS in CentOS. SSH to your VPS. Download and deploy Shadowsocks into your VPS. wget –no-check-certificate https://raw.githubusercontent.com/teddysun/shadowsocks_install/master/shadowsocksR.sh chmod +x shadowsocksR.sh ./shadowsocksR.sh 2>&1 | tee shadowsocksR.log Follow the promotions and set basic informaiton. If meet errors, install C compilor: yum -y install gcc automake autoconf libtool make yum -y install gcc-c++ some commands start：/etc/init.d/shadowsocks …
How to fix “Caused by: java.lang.NoClassDefFoundErr”
Use code below to compile and run our program: javac -d . Caller.java java com.Caller
How to install JavaFX on Mac
The simplest way I have seen is to use brew: brew tap bell-sw/liberica brew install –cask liberica-jdk15-full Then we could use terminal at least to run our JavaFX program. However, I think here would be more setting steps if you wanna run it in some IDE.