大约有 43,200 项符合查询结果（耗时：0.0580秒） [XML]
Omit rows containing specific column of NA
...ses function and put it into a function thusly:
DF <- data.frame(x = c(1, 2, 3), y = c(0, 10, NA), z=c(NA, 33, 22))
completeFun <- function(data, desiredCols) {
completeVec <- complete.cases(data[, desiredCols])
return(data[completeVec, ])
}
completeFun(DF, "y")
# x y z
# 1 1 0 ...
Git merge without auto commit
...it is saying Fast Forward
In such situations, you want to do:
git merge v1.0 --no-commit --no-ff
share
|
improve this answer
|
follow
|
...
How do I find a specific table in my EDMX model quickly?
...
179
Click in an open area of the designer:
Go to the Properties tab:
In the dropdown box at...
Literal suffix for byte in .NET?
...
148
There is no mention of a literal suffix on the MSDN reference for Byte as well as in the C# 4....
How do I get logs/details of ansible-playbook module executions?
...
114
If you pass the -v flag to ansible-playbook on the command line, you'll see the stdout and std...
How to name variables on the fly?
...
118
Use assign:
assign(paste("orca", i, sep = ""), list_name[[i]])
...
Chrome's remote debugging (USB debugging) not working for Samsung Galaxy S3 running android 4.3
Ever since I upgraded my Samsung Galaxy S3 to android 4.3 (from 4.1.2) I am unable to use Chrome's remote debugging for android (more details here ).
...
正则表达式 30 分钟入门教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...作者以及来源。
正则表达式30分钟入门教程
版本：v2.31 (2009-4-11) 作者：deerchao 转载请注明来源
目录
跳过目录
本文目标
如何使用本教程
正则表达式到底是什么东西？
入门
测试正则表达式
元字符
字符转义
重复
字...
How do you find the sum of all the numbers in an array in Java?
...
271
In java-8 you can use streams:
int[] a = {10,20,30,40,50};
int sum = IntStream.of(a).sum();
Sys...
The Ruby %r{ } expression
...t
\s # white space char
(group) # first group
(?:alt1|alt2) # some alternation
end
}x
share
|
improve this answer
|
follow
|
...