大约有 46,000 项符合查询结果（耗时：0.0631秒） [XML]
What does PermGen actually stand for?
...n specific.
Briefly, it contains the Java objects associated with classes and interned strings. In Sun's client implementation with sharing on, classes.jsa is memory mapped to form the initial data, with about half read-only and half copy-on-write.
Java objects that are merely old are kept in the ...
ImportError: numpy.core.multiarray failed to import
...
I was getting the same error and was able to solve it by updating my numpy installation to 1.8.0:
pip install -U numpy
share
|
improve this answer
...
Where are static methods and static variables stored in Java?
...stance related).
Update for clarification:
Note that only the variables and their technical values (primitives or references) are stored in PermGen space.
If your static variable is a reference to an object that object itself is stored in the normal sections of the heap (young/old generation or...
What is the difference between BIT and TINYINT in MySQL?
...NT is an 8-bit integer value, a BIT field can store between 1 bit, BIT(1), and 64 bits, BIT(64). For a boolean values, BIT(1) is pretty common.
share
|
improve this answer
|
...
How can I output UTF-8 from Perl?
I am trying to write a Perl script using the "utf8" pragma, and I'm getting unexpected results. I'm using Mac OS X 10.5 (Leopard), and I'm editing with TextMate. All of my settings for both my editor and operating system are defaulted to writing files in utf-8 format.
...
How to generate a core dump in Linux on a segmentation fault?
...s on what shell you are using. If you are using bash, then the ulimit command controls several settings relating to program execution, such as whether you should dump core. If you type
ulimit -c unlimited
then that will tell bash that its programs can dump cores of any size. You can specify a ...
Determine if running on a rooted device
...e root is available. Rather than having this feature fail when it is used (and then show an appropriate error message to the user), I'd prefer an ability to silently check if root is available first, and if not,hide the respective options in the first place.
...
Is there any way to change input type=“date” format?
...ange the format
We have to differentiate between the over the wire format and the browser's presentation format.
Wire format
The HTML5 date input specification refers to the RFC 3339 specification, which specifies a full-date format equal to: yyyy-mm-dd. See section 5.6 of the RFC 3339 specificat...
How to check if AlarmManager already has an alarm set?
...o check if a particular alarm (registered via AlarmManager) is already set and running. Results from google seem to indicate that there is no way to do this. Is this still correct? I need to do this check in order to advise the user before any action is taken to create a new alarm.
...
What does a just-in-time (JIT) compiler do?
...cifically do as opposed to a non-JIT compiler? Can someone give a succinct and easy to understand description?
18 Answers
...