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How to use a variable to specify column name in ggplot
... whoever heard of ensym() before? BIG SIGH
– CoderGuy123
Jun 4 '19 at 14:37
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Why is enum class preferred over plain enum?
...class Mammal { kangaroo, deer, human }; // another enum class
void fun() {
// examples of bad use of plain enums:
Color color = Color::red;
Card card = Card::green_card;
int num = color; // no problem
if (color == Card::red_card) // no problem (bad)
cout <...
Nginx缓存解决方案：SRCache - 更多技术 - 清泛网 - 专注C/C++及内核技术
...效了？试试下面的命令：
shell> curl -v "http://foo.com/test?x=123&y=abc"
< X-SRCache-Fetch-Status: HIT
< X-SRCache-Store-Status: BYPASS
目前我主要用srcache来缓存一些接口的json结果集，这些接口同时也支持jsonp，也就是客户端传递一个callback参数之...
How to get an enum value from a string value in Java?
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123
Here's a nifty utility I use:
/**
* A common method for all enums since they can't have anot...
How to add Web API to an existing ASP.NET MVC 4 Web Application project?
....Routing, System.Web.Net and System.Net.Http?
– gabed123
Mar 7 '19 at 23:04
add a comment
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How to convert a data frame column to numeric type?
... you want to convert to numeric. I suggest that you should apply transform function in order to complete your task.
Now I'm about to demonstrate certain "conversion anomaly":
# create dummy data.frame
d <- data.frame(char = letters[1:5],
fake_char = as.character(1:5),
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NoSQL - MongoDB vs CouchDB [closed]
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123
If you are coming from the MySQL world, MongoDB is going to "feel" a lot more natural to you b...
Why did my Git repo enter a detached HEAD state?
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123
I reproduced this just now by accident:
lists the remote branches
git branch -r
origi...
select * vs select column
... order; all his code broke as soon as someone else changed the table. What fun we had.
– Paul McKenzie
Jul 5 '10 at 15:06
7
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Why doesn't String switch statement support a null case?
... Paul BelloraPaul Bellora
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