大约有 43,100 项符合查询结果（耗时：0.0628秒） [XML]
How to get the clicked link's href with jquery?
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175
this in your callback function refers to the clicked element.
$(".addressClick").click(fun...
使用CSplitterWnd实现拆分窗口（多视图显示） - C/C++ - 清泛网 - 专注C/C++及内核技术
...用户可以缩放各行各列。一个静态拆分窗口最多可以包含16行16列。
要找一个使用了静态拆分窗口的应用程序，只要看一下windows管理器即可。
动态拆分窗口最多可以有两行两列，但它们可以相互拆分和合并。Vc就使用了动态拆...
Find the files existing in one directory but not in the other [closed]
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14 Answers
14
Active
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Why does google.load cause my page to go blank?
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110
Looks like google.load is adding the script to the page using a document.write(), which if use...
Swift equivalent for MIN and MAX macros
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125
min and max are already defined in Swift:
func max<T : Comparable>(x: T, y: T, rest: T....
Is there a query language for JSON?
...ave different conceptual models (hierarchic vs object/struct).
EDIT Sep-2015: Actually there is now JSON Pointer standard that allows very simple and efficient traversal of JSON content. It is not only formally specified, but also supported by many JSON libraries. So I would call it actual real use...
How to check if a query string value is present via JavaScript?
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10 Answers
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Drop data frame columns by name
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You can use a simple list of names :
DF <- data.frame(
x=1:10,
y=10:1,
z=rep(5,10),
a=11:20
)
drops <- c("x","z")
DF[ , !(names(DF) %in% drops)]
Or, alternatively, you can make a list of those to keep and refer to them by name :
keeps <- c("y", "a")
DF[keeps]
EDIT ...
What MySQL data type should be used for Latitude/Longitude with 8 decimal places?
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610
DECIMAL is the MySQL data-type for exact arithmetic. Unlike FLOAT its precision is fixed for an...
Where in an Eclipse workspace is the list of projects stored?
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153
Windows:
<workspace>\.metadata\.plugins\org.eclipse.core.resources\.projects\
Linux /...