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An item with the same key has already been added

... use another name. If you share your model, we would be able to elaborate more. share | improve this answer | follow | ...
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Pure JavaScript Graphviz equivalent [closed]

...not documented -- the author definitely ought to publicize and document it more (I'll contact him to suggest he put it up on github, at the very least). Update: code has been pushed to github: https://github.com/gyuque/livizjs Update (14/2/2013): another contender has arisen! anybody interested in t...
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Access event to call preventdefault from custom function originating from onclick attribute of tag

... this requires a <script> tag for every click event making the code more complicated. – somid3 Jun 4 '12 at 1:13 ...
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How to send POST request in JSON using HTTPClient in Android?

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Directive isolate scope with ng-repeat scope in AngularJS

... in them. That is, they should never be primitives. See this SO answer for more information. Here is a picture of what the scopes initially look like. After clicking the first item, the scopes now look like this: Notice that a new selected property was created on the ngRepeat scope. The co...
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What does a Ajax call response like 'for (;;); { json data }' mean? [duplicate]

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Is there a way to pass optional parameters to a function?

...ython.org/2/tutorial/controlflow.html#default-argument-values I find this more readable than using **kwargs. To determine if an argument was passed at all, I use a custom utility object as the default value: MISSING = object() def func(arg=MISSING): if arg is MISSING: ... ...
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ReactJS SyntheticEvent stopPropagation() only works with React events?

...ified that delegation is necessarily only used for events that bubble. For more details on event handling, React's source has descriptive comments: ReactBrowserEventEmitter.js. share | improve this ...
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How to use Sphinx's autodoc to document a class's __init__(self) method?

... by autodoc. Since Sphinx 1.2, this option takes arguments which makes it more useful than it was previously. Use automethod: .. autoclass:: MyClass :members: .. automethod:: __init__ This has to be added for every class (cannot be used with automodule, as pointed out in a comment ...
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Java ResultSet how to check if there are any results

...irst row now. It should be noted however, that Seifer's answer below is a more elegant solution to this question. share | improve this answer | follow | ...