大约有 47,000 项符合查询结果（耗时：0.0520秒） [XML]
Rendering JSON in controller
...eating your own dogfood and doing both
In both cases render :json => som>me m>_data will JSON-ify the provided data. The :callback key in the second example needs a bit more explaining (see below), but it is another variation on the sam>me m> idea (returning data in a way that JavaScript can easily handl...
Is pass-by-value a reasonable default in C++11?
In traditional C++, passing by value into functions and m>me m>thods is slow for large objects, and is generally frowned upon. Instead, C++ programm>me m>rs tend to pass references around, which is faster, but which introduces all sorts of complicated questions around ownership and especially around m>me m>mory ma...
Configuring Log4j Loggers Programmatically
I am trying to use SLF4J (with log4j binding) for the first tim>me m>.
4 Answers
4
...
Undock Chrom>me m> Developer Tools
How do I undock the Chrom>me m> Developer Tools in Chrom>me m>?
Pressing the left bottom corner just moves it to the right side.
3 An...
Ruby on Rails: getting the max value from a DB column
...
Assuming your model nam>me m> is Bar and it has a column nam>me m>d bar, this should work:
Bar.maximum("bar")
See the excellent Rails Guides section on Calculations for more info.
...
Boolean operators && and ||
...een & and && (correspondingly | and || ) is that the form>me m>r is vectorized while the latter is not.
3 Ans...
Using git repository as a database backend
I'm doing a project that deals with structured docum>me m>nt database. I have a tree of categories (~1000 categories, up to ~50 categories on each level), each category contains several thousands (up to, say, ~10000) of structured docum>me m>nts. Each docum>me m>nt is several kilobytes of data in som>me m> structured f...
Cross-thread operation not valid: Control accessed from a thread other than the thread it was create
...
As per Prerak K's update comm>me m>nt (since deleted):
I guess I have not presented the question properly.
Situation is this: I want to load data into a global variable based on the value of a control. I don't want to change the value of a control from the ...
$(window).scrollTop() vs. $(docum>me m>nt).scrollTop()
...
They are both going to have the sam>me m> effect.
However, as pointed out in the comm>me m>nts: $(window).scrollTop() is supported by more web browsers than $('html').scrollTop().
share
...
How do I enable language extensions from within GHCi?
...t tab completion for available extensions, which is handy when you can't rem>me m>mber where they decided to use abbreviations ("MultiParam") or acronyms ("GADT") rather than spelling things out in full ("MonomorphismRestriction")...
– C. A. McCann
Sep 25 '12 at 14:...