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What is the “->” PHP operator called and how do you say it when reading code out loud? [closed]
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16 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 ...
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...
TypeError: got multiple values for argument
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edited May 31 '16 at 5:51
arogachev
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Installing Bower on Ubuntu
I'm trying to install Bower on XUbuntu 13.10, following the instructions on the Bower home page, after doing sudo apt-get install npm and sudo npm install -g bower I get the following after issuing bower on the command line:
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Get loop counter/index using for…of syntax in JavaScript
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11 Answers
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Python: how to print range a-z?
1. Print a-n: a b c d e f g h i j k l m n
17 Answers
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How to disable all inside a form with jQuery?
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In older versions you could use attr. As of jQuery 1.6 you should use prop instead:
$("#target :input").prop("disabled", true);
To disable all form elements inside 'target'. See :input:
Matches all input, textarea, select and button elements.
If you only want the <...
Sort Go map values by keys
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158
The Go blog: Go maps in action has an excellent explanation.
When iterating over a map with a...