大约有 40,000 项符合查询结果（耗时：0.0485秒） [XML]
Why is Thread.Sleep so harmful
...ensive database calls, to a DB shared by thousands of concurrent users. In order to not hammer the DB and exclude others for hours, I'll need a pause between calls, in the order of 100 ms. This is not related to timing, just to yielding access to the DB for other threads.
Spending 2000-8000 cycles ...
What does -save-dev mean in npm install grunt --save-dev
...indicate in your package.json files:
Those packages that are required in order to use your module are listed under the "dependencies" property. Using npm you can add those dependencies to your package.json file this way:
npm install --save packageName
Those packages required in order to help dev...
What is difference between XML Schema and DTD?
...w support for namespaces while DTD does not.
XML schemas define number and order of child elements, while DTD does not.
XML schemas can be manipulated on your own with XML DOM but it is not possible in case of DTD.
using XML schema user need not to learn a new language but working with DTD is diffic...
LINQ .Any VS .Exists - What's the difference?
...0:00.0180018 Exists: 00:00:00.0090009"
With 500k, (I also flipped around order in which they get evaluated to see if there is no additional operation associated with whichever runs first.)
" Exists: 00:00:00.0050005 Any: 00:00:00.0100010"
With 100k records
" Exists: 00:00:00.0010001 Any:...
Naming convention for utility classes in Java
...ed to name and address and the other contains utility functions related to orders, then call them CustomerNameAndAddressUtil and CustomerOrderUtil or some such. I regularly go nuts when I see meaningless subtle differences in names. Like just yesterday I was working on a program that had three field...
Why unsigned integer is not available in PostgreSQL?
...se PostgreSQL int4 or int8 respectively, just remembering that the natural order or arithmetic won't work reliably. But storing and retrieving is unaffected by that.
Here is how I can implement a simple unsigned int8:
First I will use
CREATE TYPE name (
INPUT = uint8_in,
OUTPUT = uint...
How to add a touch event to a UIView?
...g from the gesture in the Document Outline to your View Controller code in order to make an Outlet and an Action.
This should be set by default, but also make sure that User Action Enabled is set to true for your view.
Adding a Gesture Programmatically
To add a gesture programmatically, you (1) cr...
Get exit code of a background process
...ne
# Wait for all processes to finish, will take max 14s
# as it waits in order of launch, not order of finishing
for p in $pids; do
if wait $p; then
echo "Process $p success"
else
echo "Process $p fail"
fi
done
...
How to convert AAR to JAR
...Lib.jar) and move it to the lib folder within the extracted folder.
Now in order for Eclipse to accept it you need to put two files into the extracted folder root:
.project
.classpath
To do that, create a new Android dummy project in Eclipse and copy over the files, or copy over from an existing ...
What is the difference between up-casting and down-casting with respect to class variable
....
((Dog) a).callme2(); // Downcasting: Compiler does know Animal it is, In order to use Dog methods, we have to do typecast explicitly.
// Internally if it is not a Dog object it throws ClassCastException
share
|
...