cya blog

There is a technique known as the “Clockwise/Spiral Rule” which enables any C programmer to parse in their head any C declaration!

Memory allocated by malloc won’t be freed after the function returns, and it will be freed when the process exits. So we can use malloc to allocate memory which can be used during the whole life of...

Rename local branch and remote branch Switch to the local branch to be renamed 1 git checkout <old-name> Rename local branch 1 git branch -m <new-name>...

配置实验室服务器访问自己的 GitHub 账号，想把已有的 ~/.ssh/id_rsa 添加到自己账户的 ssh keys 中，但是报错 Key is already in use。原因是 GitHub 不允许一个 ssh key 给多个账户使用。 因此我需要在服务器上生成一个新的 ssh key 给自己的账户用，但是在 git clone 时会默认用 ~/.ssh/id_rsa 来与 g...