大约有 11,500 项符合查询结果（耗时：0.0179秒） [XML]
How do you performance test JavaScript code?
...
Profilers are definitely a good way to get numbers, but in my experience, perceived performance is all that matters to the user/client. For example, we had a project with an Ext accordion that expanded to show some data and then a few nested Ext grids. Everything was ac...
Split a vector into chunks in R
...ve to split a vector into n chunks of equal size in R. I couldn't find any base function to do that. Also Google didn't get me anywhere. So here is what I came up with, hopefully it helps someone some where.
...
How do I focus on one spec in jasmine.js?
I have a bunch of failing specs from a rather large architectural change. I'd like to work on fixing them one by one by tagging each one with 'focus'.
...
Are +0 and -0 the same?
...
JavaScript uses IEEE 754 standard to represent numbers. From Wikipedia:
Signed zero is zero with an associated sign. In ordinary arithmetic, −0 = +0 = 0. However, in computing, some number representations allow for the existence of two zeros, often denoted by −0 (neg...
What's the best way to develop a sideswipe menu like the one in Facebook's new iOS app?
It appears that side-swipe menus are becoming a more common interface element as more information gets crammed into each iPhone app. Facebook has included it in their latest version and the new Gmail app appears to include it as well . I was wondering if anybody had thoughts on the most efficient...
What is the largest TCP/IP network port number allowable for IPv4?
What is the highest port number one can use?
8 Answers
8
...
Should I initialize variable within constructor or outside constructor [duplicate]
When I use Java based on my C++ knowledge, I love to initialize variable using the following way.
11 Answers
...
How do I clone a Django model instance object and save it to the database?
In the database, I want to add another object which is a copy of the object above.
13 Answers
...
How do I do a not equal in Django queryset filtering?
...QuerySets, I see that there is a __gt and __lt for comparitive values, but is there a __ne / != / <> ( not equals ?)
...
Can you have multiline HTML5 placeholder text in a ?
...ields that disappear when you focus on them using HTML5's placeholder attribute:
15 Answers
...