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Draw on HTML5 Canvas using a mouse

I want to draw on a HTML Canvas using a mouse (for example, draw a signature, draw a name, ...) 13 Answers ...
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Convert Django Model object to dict with all of the fields intact

How does one convert a Django Model object to a dict with all of its fields? All ideally includes foreign keys and fields with editable=False . ...
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Creating a config file in PHP

I want to create a config file for my PHP project, but I'm not sure what the best way to do this is. 10 Answers ...
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How can I get jQuery to perform a synchronous, rather than asynchronous, Ajax request?

I have a JavaScript widget which provides standard extension points. One of them is the beforecreate function. It should return false to prevent an item from being created. ...
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Convert generator object to list for debugging [duplicate]

When I'm debugging in Python using IPython, I sometimes hit a break-point and I want to examine a variable that is currently a generator. The simplest way I can think of doing this is converting it to a list, but I'm not clear on what's an easy way of doing this in one line in ipdb , since I'm so n...
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How do I ignore the initial load when watching model changes in AngularJS?

I have a web page that serves as the editor for a single entity, which sits as a deep graph in the $scope.fieldcontainer property. After I get a response from my REST API (via $resource), I add a watch to 'fieldcontainer'. I am using this watch to detect if the page/entity is "dirty". Right now I'm ...
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Use cases for NoSQL [closed]

NoSQL has been getting a lot of attention in our industry recently. I'm really interested in what peoples thoughts are on the best use-cases for its use over relational database storage. What should trigger a developer into thinking that particular datasets are more suited to a NoSQL solution. I'm p...
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How do I generate random number for each row in a TSQL Select?

I need a different random number for each row in my table. The following seemingly obvious code uses the same random value for each row. ...
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Do HttpClient and HttpClientHandler have to be disposed between requests?

System.Net.Http.HttpClient and System.Net.Http.HttpClientHandler in .NET Framework 4.5 implement IDisposable (via System.Net.Http.HttpMessageInvoker ). ...
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How to remove last n characters from every element in the R vector

I am very new to R, and I could not find a simple example online of how to remove the last n characters from every element of a vector (array?) ...