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When saving, how can you check if a field has changed?
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I use following mixin:
from django.forms.models import model_to_dict
class ModelDiffMixin(object):
"""
A model mixin that tracks model fields' values and provide some useful api
to know what fields have been changed.
"""
def __init__(sel...
How do you tell the Visual Studio project type from an existing Visual Studio project
...nsole applications contain:
<OutputType>Exe</OutputType>
WinForms applications contain:
<OutputType>WinExe</OutputType>
Library (.dll) projects contain:
<OutputType>Library</OutputType>
and do NOT contain a
<ProjectTypeGuids>
ASP.NET and WCF pro...
What is Dispatcher Servlet in Spring?
... methods on Controller classes) and views (generally JSPs) that combine to form the page or resource that's supposed to be found at that location.
I might have
a file /WEB-INF/jsp/pages/Home.jsp
and a method on a class
@RequestMapping(value="/pages/Home.html")
private ModelMap buildHome() {
...
How do I get an animated gif to work in WPF?
...ack://application:,,," + this.GifSource), BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.Default);
_animation = new Int32Animation(0, _gifDecoder.Frames.Count - 1, new Duration(new TimeSpan(0, 0, 0, _gifDecoder.Frames.Count / 10, (int)((_gifDecoder.Frames.Count / 10.0 - _gifDecod...
How to convert a number to string and vice versa in C++
... precision for floating point types. For instance double f = 23.4323897462387526; std::string f_str = std::to_string(f); returns a string of 23.432390. This makes it impossible to round trip floating point values using these functions.
– fun4jimmy
Nov 26 '14 at...
Java; String replace (using regular expressions)?
As part of a project for school, I need to replace a string from the form:
12 Answers
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cocktail party algorithm SVD implementation … in one line of code?
...used to factorize the signal into different components based on spectrum information. Diagonal values in s are the magnitude of different spectrum components. The rows in u and columns in v' are the orthogonal vectors that map the frequency component with the corresponding magnitude to X space.
I d...
How to find list of possible words from a letter matrix [Boggle Solver]
... 6% =========
64-79 18831 1% ==
80-95 19271 1% ==
96-111 238398 22% ==============================
112-127 3007 <1%
128-143 236727 21% ==============================
More Mumblings on that Regex Optimization
The regex optimization I use is us...
How can I debug a HTTP POST in Chrome?
...I'd recommend starting there, but if you're struggling to understand the information there, and you need either more explanation or more power then proper focused tools can be useful!
For this case, it'll show you the full POST body you're looking for, with a friendly editor and highlighting (all p...
ASP.NET MVC partial views: input name prefixes
...to the old prefix from helper.ViewData.TemplateInfo.HtmlFieldPrefix in the form of {oldprefix}.{newprefix}
– Ivan Zlatev
Mar 1 '12 at 16:29
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