大约有 44,492 项符合查询结果（耗时：0.0451秒） [XML]
open() in Python does not create a file if it doesn't exist
What is the best way to open a file as read/write if it exists, or if it does not, then create it and open it as read/write? From what I read, file = open('myfile.dat', 'rw') should do this, right?
...
Can you target with css?
Is it possible to target the line-break <br/> tag with CSS?
14 Answers
14
...
When to use static vs instantiated classes
PHP is my first programming language. I can't quite wrap my head around when to use static classes vs instantiated objects.
...
What is the most robust way to force a UIView to redraw?
I have a UITableView with a list of items. Selecting an item pushes a viewController that then proceeds to do the following. from method viewDidLoad I fire off a URLRequest for data that is required by on of my subviews - a UIView subclass with drawRect overridden. When the data arrives from the clo...
In Git, how can I write the current commit hash to a file in the same commit
I'm trying to do a fancy stuff here with Git hooks, but I don't really know how to do it (or if it's possible).
7 Answers
...
Importing CSV with line breaks in Excel 2007
... behave differently depending on whether a CSV file is imported by opening it from the File->Open menu or by double-clicking on the file in Explorer.
I have a CSV file that is in UTF-8 encoding and contains newlines in some cells. If I open this file from Excel's File->Open menu, the "import ...
Constant Amortized Time
What is meant by "Constant Amortized Time" when talking about time complexity of an algorithm?
6 Answers
...
How do I run a node.js app as a background service?
...
Copying my own answer from How do I run a Node.js application as its own process?
2015 answer: nearly every Linux distro comes with systemd, which means forever, monit, PM2, etc are no longer necessary - your OS already handles these tasks.
Make a myapp.service file (replacing 'myapp' w...
FileSystemWatcher vs polling to watch for file changes
...e system watcher fail in production and test environments. I now consider it a convenience, but I do not consider it reliable. My pattern has been to watch for changes with the files system watcher, but poll occasionally to catch missing file changes.
Edit: If you have a UI, you can also give y...
Ruby on Rails: how to render a string as HTML?
...
UPDATE
For security reason, it is recommended to use sanitize instead of html_safe. Link
What's happening is that, as a security measure, Rails is escaping your string for you because it might have malicious code embedded in it. But if yo...