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How to check if a query string value is present via JavaScript?
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10 Answers
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How can I get a Bootstrap column to span multiple rows?
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167
For Bootstrap 3:
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/boots...
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 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
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How to log cron jobs?
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* * * * * myjob.sh >> /var/log/myjob.log 2>&1
will log all output from the cron job to /var/log/myjob.log
You might use mail to send emails. Most systems will send unhandled cron job output by email to root or the corresponding user.
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Returning JSON from PHP to JavaScript?
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194
Php has an inbuilt JSON Serialising function.
json_encode
json_encode
Please use that if y...
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 ...