大约有 48,000 项符合查询结果（耗时：0.1368秒） [XML]
Can you attach Amazon EBS to multiple instances?
We currently use multiple webservers accessing one mysql server and fileserver. Looking at moving to the cloud, can I use this same setup and attach the EBS to multiple machine instances or what's another solution?
...
Iterate a list with indexes in Python
...ve seen the function (or method) that takes a list, like this [3, 7, 19] and makes it into iterable list of tuples, like so: [(0,3), (1,7), (2,19)] to use it instead of:
...
Why do Java programmers like to name a variable “clazz”? [closed]
...t says class. "International" English speakers (those reading both British and American English) are used to transposing 's' and 'z'.
Since Java has had disclosed source and a suitable culture right from the start, worthwhile Java code and tutorials pick up the same conventions. That's one of the g...
Is there an S3 policy for limiting access to only see/access one bucket?
I have a simple bucket that looks like images.mysite.com on my S3 and other buckets containing backups, etc.
23 Answers
...
Why are arrays covariant but generics are invariant?
...
Via wikipedia:
Early versions of Java and C# did not include generics (a.k.a. parametric polymorphism).
In such a setting, making arrays invariant rules out useful polymorphic programs.
For example, consider writing a function to shuffle an array, or a fun...
Is having an 'OR' in an INNER JOIN condition a bad idea?
...dge: there may be additional conditions which could help SQL Server understand that a concatenation would be needed. Say, the query SELECT * FROM othertable WHERE parentId = 1 OR id = 2 will use a concatenation if both fields are indexed so theoretically there is nothing that would prevent doing the...
How should I validate an e-mail address?
...chnique for validating an e-mail address (e.g. from a user input field) in Android? org.apache.commons.validator.routines.EmailValidator doesn't seem to be available. Are there any other libraries doing this which are included in Android already or would I have to use RegExp?
...
Clear Application's Data Programmatically
...ationUserData().
I highly recommend using it in new applications:
import android.os.Build.*;
if (VERSION_CODES.KITKAT <= VERSION.SDK_INT) {
((ActivityManager)context.getSystemService(ACTIVITY_SERVICE))
.clearApplicationUserData(); // note: it has a return value!
} else {
// ...
How to pull request a wiki page on GitHub?
...t isn't open for editing. Then I forked the project, edited it on "my end" and tried to do a pull request. It turns out, the wiki isn't in the project, and there isn't a way to commit changes to it.
...
Programmatically saving image to Django ImageField
Ok, I've tried about near everything and I cannot get this to work.
17 Answers
17
...