大约有 40,000 项符合查询结果（耗时：0.0736秒） [XML]
Store pictures as files or in the database for a web app?
...l include a lot of pictures and hopefully a fair amount of traffic. I do really want to achieve performance.
10 Answers
...
jQuery Call to WebService returns “No Transport” error
...
@drachenstern Glad to be of help! All this web stuff is tricky - something new to learn everyday :)
– no.good.at.coding
Mar 9 '11 at 4:11
1...
Local dependency in package.json
I want to do something like this, so npm install also installs the package.json of ../somelocallib or more importantly its dependencies.
...
Javascript - get array of dates between 2 dates
...'t get pushed onto the array or you'll end up with an array of n elements, all as the last date. Changing it to currentDate = new Date(currentDate) works.
– Scott Klarenbach
Dec 10 '10 at 22:46
...
Call a function after previous function is complete
...
Specify an anonymous callback, and make function1 accept it:
$('a.button').click(function(){
if (condition == 'true'){
function1(someVariable, function() {
function2(someOtherVariable);
});
}
else {
d...
Which Visual C++ file types should be committed to version control?
...'d choose those:
cpp
filters
h
ico
manifest
rc
rc2
sln
txt
vcxproj
Generally, you should version all files necessary to build the project. Automatically generated files should not be archived imho.
share
|
...
What is an SDL renderer?
...
SDL_Window
SDL_Window is the struct that holds all info about the Window itself: size, position, full screen, borders etc.
SDL_Renderer
SDL_Renderer is a struct that handles all rendering. It is tied to a SDL_Window so it can only render within that SDL_Window. It als...
Profiling Django
...at queries are executed on each page and how much time they take. It's a really useful, powerful and easy to use tool.
Also, read recommendations about Django performance in Database access optimization from the documentation.
And Django performance tips by
Jacob Kaplan-Moss.
...
Clang optimization levels
...ass=Arguments
As pointed out in Geoff Nixon's answer (+1), clang additionally runs some higher level optimizations, which we can retrieve with:
echo 'int;' | clang -xc -O3 - -o /dev/null -\#\#\#
Documentation of individual passes is available here.
With version 6.0 the passes are as follow...
Drop unused factor levels in a subsetted data frame
...tion, a new data frame is created. However, the factor variable retains all of its original levels, even when/if they do not exist in the new dataframe.
...