大约有 24,000 项符合查询结果（耗时：0.0270秒） [XML]
Load multiple packages at once
How can I load a bunch of packages at once with out retyping the require command over and over? I've tried three approaches all of which crash and burn.
...
How to initialise memory with new operator in C++?
I'm just beginning to get into C++ and I want to pick up some good habits. If I have just allocated an array of type int with the new operator, how can I initialise them all to 0 without looping through them all myself? Should I just use memset ? Is there a “C++” way to do it?
...
JavaScript + Unicode regexes
How can I use Unicode-aware regular expressions in JavaScript?
11 Answers
11
...
Copy and paste content from one file to another file in vi
I am working with two files, and I need to copy a few lines from one file and paste into another file. I know how to copy (yy) and paste (p) in the same file. But that doesn't work for different files. How is this done?
...
Why should I declare a virtual destructor for an abstract class in C++?
I know it is a good practice to declare virtual destructors for base classes in C++, but is it always important to declare virtual destructors even for abstract classes that function as interfaces? Please provide some reasons and examples why.
...
Check if an apt-get package is installed and then install it if it's not on Linux
...e, the removal of old and the installation of new packages).
See also:
https://askubuntu.com/questions/165951/dpkg-get-selections-shows-packages-marked-deinstall
https://askubuntu.com/questions/423355/how-do-i-check-if-a-package-is-installed-on-my-server
Tested on Ubuntu 19.10.
Python apt pac...
How do you make an array of structs in C?
I'm trying to make an array of structs where each struct represents a celestial body.
7 Answers
...
PostgreSQL: How to pass parameters from command line?
I have a somewhat detailed query in a script that uses ? placeholders. I wanted to test this same query directly from the psql command line (outside the script). I want to avoid going in and replacing all the ? with actual values, instead I'd like to pass the arguments after the query.
...
Regex to validate password strength
My password strength criteria is as below :
11 Answers
11
...
Keystore type: which one to use?
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...