大约有 46,000 项符合查询结果（耗时：0.0645秒） [XML]
How do you read CSS rule values with JavaScript?
...nces to be aware of:
Given the CSS:
div#a { ... }
div#b, div#c { ... }
and given InsDel's example, classes will have 2 classes in FF and 3 classes in IE7.
My example illustrates this:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-t...
Multiple inheritance for an anonymous class
...two (or more) interfaces? Alternatively, how can it both extend a class and implement an interface?
For example, I want to create an object of anonymous class that extends two interfaces:
...
How do you create optional arguments in php?
...ed null as default argument in the first example, not $timestamp = time(), and combined it with a null check. Literals include arrays (array() or []), booleans, numbers, strings, and null.
share
|
i...
Adding Only Untracked Files
One of the commands I find incredibly useful in Git is git add -u to throw everything but untracked files into the index. Is there an inverse of that? In the last few months, I've often found myself in a position where I've interactively added some updates to the index and I want to add all of the...
Convert from enum ordinal to enum type
...
I implemented this solution and it is not working for me. It returns out the ordinal value is not guaranteed to match the order in which the enumerated types are added. I don't know that is what this answer is advocating, but I wanted to warn people non...
How can I see the SQL that will be generated by a given ActiveRecord query in Ruby on Rails
... been issued, but I'm wondering if there is a method that can be called on and ActiveRecord Query.
11 Answers
...
iPhone UIView Animation Best Practice
...ns:context: method:
Use of this method is discouraged in iPhone OS 4.0 and later. You should use the block-based animation methods instead.
Eg of Block-based Animation based on Tom's Comment
[UIView transitionWithView:mysuperview
duration:0.75
options:UIV...
Which is fastest? SELECT SQL_CALC_FOUND_ROWS FROM `table`, or SELECT COUNT(*)
...ND_ROWS?
Just a quick summary: Peter says that it depends on your indexes and other factors. Many of the comments to the post seem to say that SQL_CALC_FOUND_ROWS is almost always slower - sometimes up to 10x slower - than running two queries.
...
Approximate cost to access various caches and main memory?
Can anyone give me the approximate time (in nanoseconds) to access L1, L2 and L3 caches, as well as main memory on Intel i7 processors?
...
Why does “git difftool” not open the tool directly?
...rompt
Prompt before each invocation of the diff tool.
The following command turns off the prompt globally (for all repos):
git config --global difftool.prompt false
Which is like writing in ~/.gitconfig:
(or in %HOMEDRIVE%%HOMEPATH%\.gitconfig)
[difftool]
prompt = false
...