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#define macro for debug printing in C?
... always see the debug code?
[Rehashing comments made to another answer.]
One central idea behind both the C99 and C89 implementations above is that the compiler proper always sees the debugging printf-like statements. This is important for long-term code — code that will last a decade or two.
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Append an object to a list in R in amortized constant time, O(1)?
...shortcomings with it, so by all means also see some of the comments below. One suggestion for list types:
newlist <- list(oldlist, list(someobj))
In general, R types can make it hard to have one and just one idiom for all types and uses.
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Difference between outline and border
...CSS standard, and is not supported by other browsers (source))
2) Styling one side only
border has properties to style each side with border-top:, border-left: etc.
outline can't do this. There's no outline-top: etc. It's all or nothing. (see this SO post)
3) offset
outline supports offset wi...
Using backticks around field names
...e alternative characters. In query writing it's not such a problem, but if one assumes you can just use backticks, I would assume it lets you get away with ridiculous stuff like
SELECT `id`, `my name`, `another field` , `field,with,comma`
Which does of course generate badly named tables.
If yo...
Programmatic equivalent of default(Type)
...n the type and set the default(Type) explicitly, but I'd rather do it in one line. Is there a programmatic equivalent of default?
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When to use IComparable Vs. IComparer
...ed to implement. They both essentially do the same thing. When would I use one over the other?
8 Answers
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pull out p-values and r-squared from a linear regression
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> lmp(fit)
[1] 1.622665e-05
In the case of a simple regression with one predictor, the model p-value and the p-value for the coefficient will be the same.
Coefficient p-values: If you have more than one predictor, then the above will return the model p-value, and the p-value for coefficient...
What is the difference between a 'closure' and a 'lambda'?
Could someone explain? I understand the basic concepts behind them but I often see them used interchangeably and I get confused.
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ImportError: Cannot import name X
...red Feb 12 '12 at 21:01
Teemu IkonenTeemu Ikonen
10.7k44 gold badges1818 silver badges3333 bronze badges
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React.js - input losing focus when rerendering
...guess.
When you create a EditorContainer, specify a unique key for the component:
<EditorContainer key="editor1"/>
When a re-rendering occurs, if the same key is seen, this will tell React don't clobber and regenerate the view, instead reuse. Then the focused item should retain focus.
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