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How to check if object (variable) is defined in R?
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heh. Happens to me all the time when I am testing out examples before posting, Gavin or Josh have already answered it.
– Maiasaura
Feb 20 '12 at 22:17
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What does asterisk * mean in Python? [duplicate]
... print "b = %s" % (b,)
print "c = %s" % (c,)
print args
foo(a="testa", d="excess", c="testc", b="testb", k="another_excess")
As you can see in the above example, we only have parameters a, b, c in the signature of the foo function. Since d and k are not present, they are put into the a...
How to clear the canvas for redrawing
...Use: context.clearRect(0, 0, canvas.width, canvas.height);
This is the fastest and most descriptive way to clear the entire canvas.
Do not use: canvas.width = canvas.width;
Resetting canvas.width resets all canvas state (e.g. transformations, lineWidth, strokeStyle, etc.), it is very slow (compar...
Placing border inside of div and not on its edge
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NOTE: outline does not respect border-radius (tested in Chrome)
– Nick
Dec 3 '16 at 18:28
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How to ignore deprecation warnings in Python
...gs before running the python application
You can disable your dockerized tests as well
ENV PYTHONWARNINGS="ignore::DeprecationWarning"
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Detect element content changes with jQuery
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Try to bind to the DOMSubtreeModified event seeign as test is also just part of the DOM.
see this post here on SO:
how-do-i-monitor-the-dom-for-changes
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How can I nullify css property?
...ve the min-height property too!
height: unset;
min-height: none
Edit: I tested on IE 7 and it doesn't recognize "unset", so "auto" works better".
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How do I call the default deserializer from a custom deserializer in Jackson
... mapper.registerModule(module);
User user = mapper.readValue(new File("test.json"), User.class);
}
}
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Checking if a variable is an integer
...anging \d+? to \d* might fix it, but I'd want to run it through a suite of tests to be sure. This also won't match hex or exponential notation, but I'm sure that's fine for certain use cases.
– Jeff
Apr 24 '12 at 16:04
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Purpose of Unions in C and C++
...t that the structure members be placed without arbitrary padding. If code tests for structure-member placement or structure size, code should work if accesses are done directly through the union, but a strict reading of the Standard would indicate that taking the address of a union or struct member...