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How do I change read/write mode for a file using Emacs?
... is set to read only mode, how do I change it to write mode and vice versa from within Emacs?
9 Answers
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Django Forms: if not valid, show form with error message
...
views.py
from django.contrib import messages
def view_name(request):
if request.method == 'POST':
form = form_class(request.POST)
if form.is_valid():
return HttpResponseRedirect('/thanks'/)
el...
What do these words mean in Git: Repository, fork, branch, clone, track?
... state of the files you're working on.
To fork a project (take the source from someone's repository at certain point in time, and apply your own diverging changes to it), you would clone the remote repository to create a copy of it, then do your own work in your local repository and commit changes....
Locking a file in Python
I need to lock a file for writing in Python. It will be accessed from multiple Python processes at once. I have found some solutions online, but most fail for my purposes as they are often only Unix based or Windows based.
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How to make an input type=button act like a hyperlink and redirect using a get request? [duplicate]
...It's simple and no javascript required!
NOTE:
This approach is not valid from HTML structure. But, it works on many modern browser. See following reference :
For <button>; and
For <input type="button />
shar...
How do I programmatically determine operating system in Java?
...10 and yet os.name gives me Windows 8.1. Why is that? Where is this coming from?
– Brian
Feb 7 '16 at 19:59
9
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Is an empty href valid?
...d URL potentially surrounded by spaces) the definition of valid URL string from WHATWG’s URL Standard, where it says that it can be a relative-URL-with-fragment string, which must at least be a relative-URL string, which can be a path-relative-scheme-less-URL string, which is a path-relative-URL s...
Unicode character in PHP string
...ectly.
As also mentioned by others, the only way to obtain a string value from any sensible Unicode character description in PHP, is by converting it from something else (e.g. JSON parsing, HTML parsing or some other form). But this comes at a run-time performance cost.
However, there is one other...
创建自定义 TinyWebDB 服务 · App Inventor 2 中文网
...n the local test server. Only now, it’s on the web and you can access it from your App Inventor for Android app.
Your App Inventor apps can store and retrieve data using your new service. Just do the following:
Drag in a TinyWebDB component into the Component Designer.
Modify the ServiceURL prop...
How can I parse JSON with C#?
...lass to customize how a class is serialized
Ability to convert JSON to and from XML
Supports multiple platforms: .NET, Silverlight and the Compact Framework
Look at the example below. In this example, JsonConvert class is used to convert an object to and from JSON. It has two static methods for thi...