大约有 15,500 项符合查询结果（耗时：0.0212秒） [XML]
Is there any difference between the `:key => “value”` and `key: “value”` hash notations?
...$in style symbols show up a fair bit when using MongoDB so you'll end up mixing Hash styles if you use MongoDB. And, if you ever work with specific keys of Hashes (h[:k]) rather than just whole hashes (h = { ... }), you'll still have to use the colon-first style for symbols; you'll also have to use ...
What is the difference between JavaConverters and JavaConversions in Scala?
...ns (since 2.8) and makes the conversion between Scala and Java collection explicit. Contrary to what David writes in his answer, I'd recommend you make it a habit to use JavaConverters as you'll be much less likely to write code that makes a lot of implicit conversions, as you can control the only s...
IIS Express Immediately shutting-down running site after stopping web application
...n I want to stop application in IDE, application was still running on IIS Express, I could browse and work with running application, but now I can't. IIS Immediately shutting-down application if I press stop button. Since I remember I didn't make any changes in setting. How should I do that running ...
Execute AsyncTask several times
In my Activity I use a class which extends from AsyncTask and a parameter which is an instance of that AsyncTask. When I call mInstanceOfAT.execute("") everything is fine.
But the app crash when I press an update button which calls again the AsyncTask(In case the network job didnt work). Cause the...
Error handling in Bash
What is your favorite method to handle errors in Bash?
The best example of handling errors I have found on the web was written by William Shotts, Jr at http://www.linuxcommand.org .
...
Path of assets in CSS files in Symfony 2
...e was launched from
"/app_dev.php/"
"/app.php/"
and "/"
thus giving 14 x 3 = 42 tests.
Additionally, all this has been tested working in a subdirectory, so there is no way to fool by giving absolute URLs because they would simply not work.
The tests were two unnamed images and then divs named ...
C++ valarray vs. vector
...rs a lot. They're nifty and fast. But I know this thing called a valarray exists. Why would I use a valarray instead of a vector? I know valarrays have some syntactic sugar, but other than that, when are they useful?
...
Returning a C string from a function
... (mbcs)) that are used to cope with international characters. UTF-8 is an example of an mbcs. For the sake of intro, I quietly 'skip over' all of this.
Memory:
This means that a string like "my string" actually uses 9+1 (=10!) bytes. This is important to know when you finally get around to allocat...
“Eliminate render-blocking CSS in above-the-fold content”
...insights to try and improve my site's performance, and so far it's proven extremely successful. Things like deferring scripts worked beautifully, since I already had an in-house version of jQuery's .ready() to defer scripts until the page had loaded fully, all I had to do was inline that particula...
What's the best way of structuring data on firebase?
...
UPDATE: There is now a doc on structuring data. Also, see this excellent post on NoSQL data structures.
The main issue with hierarchical data, as opposed to RDBMS, is that it's tempting to nest data because we can. Generally, you want to normalize data to some extent (just as you would d...