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django admin - add custom form fields that are not part of the model
I have a model registered in the admin site. One of its fields is a long string expression. I'd like to add custom form fields to the add/update page of this model in the admin that based on these fields values I will build the long string expression and save it in the relevant model field.
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How to check if running in Cygwin, Mac or Linux?
...have a shell script that is used both on Windows/Cygwin and Mac and Linux. It needs slightly different variables for each versions.
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Declaring functions in JavaScript [duplicate]
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I am on different opinion with most of the people here. Technically this syntax may mean the same for declaring functions both ways
(I stand incorrect on my last statement. I read up on a diff post why they are technically diff and I'll add in the end,...
Singleton with Arguments in Java
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I'll make my point very clear: a singleton with parameters is not a singleton.
A singleton, by definition, is an object you want to be instantiated no more than once. If you are trying to feed parameters to the constructor, what is the point of the singleton?
You hav...
When should I release objects in -(void)viewDidUnload rather than in -dealloc?
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In addition to what has already been indicated, I wanted to elaborate more about logic behind -viewDidUnload.
One of the most important reasons for implementing it is that UIViewController subclasses commonly also contain owning...
Entity Framework: There is already an open DataReader associated with this Command
I am using Entity Framework and occasionally i will get this error.
17 Answers
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How can I convert an image into Base64 string using JavaScript?
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You can use the HTML5 <canvas> for it:
Create a canvas, load your image into it and then use toDataURL() to get the Base64 representation (actually, it's a data: URL, but it contains the Base64-encoded image).
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How to get Android crash logs?
I have an app that is not in the market place (signed with a debug certificate), but would like to get crash log data, whenever my application crashes. Where can I find a log of why my app crashed?
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CSS Image size, how to fill, not stretch?
I have an image, and I want to set it a specific width and height (in pixels)
15 Answers
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XAMPP, Apache - Error: Apache shutdown unexpectedly
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edited Feb 15 '19 at 7:21
tbking
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