How to check whether a key already exists in a dict in Python since version 2.6?
If d is a dict(), you can directly test whether a key k is in d in Python by the in keyword like
if k in d:
..
解决方法是在CDialog::PreTranslateMessage() 的重载函数中将ESC和回车按键的消息处理掉. 直接上代码: BOOL CResultCollectorDlg::PreTranslateMessage(MSG* pMsg) { if(pMsg->message == WM_KEYDOWN) { switch(pMsg->wParam) { case VK_RETURN: //回车 return TRUE; case VK_ESCAPE: //ESC return TRUE; } } return CDialog::PreTranslateMessage(pMsg); } Read more: MFC程序使用系统风格界面 Send Messages to Other Windows Using Win32 API 禁止对话框关闭按钮和Alt+F4 使用MFC在一对话框中嵌入另一对话框 一个非常优秀的MFC Grid控件 Win32 Programming: Operation on Files Parameterised AngularJS Routing in Asp.net MVC using…
On Linux, I check system logs by journalctl. But it is soooo slow. How to make it faster. By default without any options, the journalctl is indeed very slow. But usually, we are only interested in some logs and can use options to specify the logs that we are interested to check. This will make…
Seems the input method on Linux (ibus) does not work well with Chrome. But other programs, e.g. thunderbird, has not problem with ibus at all. What’s wrong with Chrome or ibus? Check whether the “Qt IBus library and Qt input method plugin” is installed. If not, installing it and restarting ibus may help: # yum…
How to split a text file by lines on Linux? For example, to split a file content.txt into many files and each split contains 1024 lines. You can use the split command on Linux: split -l 1024 content.txt splitted-content.txt- It will generate splitted-content.txt-{aa,ab,….} Read more: How to calculate the average of value in lines of…
Querying transaction content out from a blockchain network is a common practice used by common scenarios like exploring the blockchain history or verifying the blockchain transaction content from a known ID. In Hyperledger Fabric, the transaction can be queried using a special system chaincode QSCC (Query System Chaincode) which is for ledger and other Fabric-related…
# ssh root@192.168.122.96 root@192.168.122.96’s password: Permission denied, please try again. Do according to [1]. NOTE: on Ubuntu, remember to restart ssh service like this “sudo restart ssh”. [1] https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/v2v_guide/preparation_before_the_p2v_migration-enable_root_login_over_ssh Read more: I cannot login Ubuntu Precise desktop ‘dd’ command cannot support calculation for its parameters How can I login without password and run command in…