大约有 41,000 项符合查询结果（耗时：0.0567秒） [XML]
Split delimited strings in a column and insert as new rows [duplicate]
... of doing it..
df <- read.table(textConnection("1|a,b,c\n2|a,c\n3|b,d\n4|e,f"), header = F, sep = "|", stringsAsFactors = F)
df
## V1 V2
## 1 1 a,b,c
## 2 2 a,c
## 3 3 b,d
## 4 4 e,f
s <- strsplit(df$V2, split = ",")
data.frame(V1 = rep(df$V1, sapply(s, length)), V2 = unlist(...
Is it possible to make relative link to image in a markdown file in a gist?
...markandmarkand
1,87911 gold badge1111 silver badges1414 bronze badges
...
What does CultureInfo.InvariantCulture mean?
...
JohnBJohnB
14.7k1515 gold badges8585 silver badges106106 bronze badges
...
Are there other whitespace codes like   for half-spaces, em-spaces, en-spaces etc useful in HTML
...space : &#8239; (no character reference available)
en space : &#8194; or &ensp;
em space : &#8195; or &emsp;
3-per-em space : &#8196; or &emsp13;
4-per-em space : &#8197; or &emsp14;
6-per-em space : &#8198; (no character reference available)
figure space : &...
How to securely save username/password (local)?
...
edited May 23 '17 at 11:54
Community♦
111 silver badge
answered Sep 30 '12 at 1:38
...
Can you configure log4net in code instead of using a config file?
I understand why log4net uses app.config files for setting up logging - so you can easily change how information is logged without needing to recompile your code. But in my case I do not want to pack a app.config file with my executable. And I have no desire to modify my logging setup.
...
Python: How would you save a simple settings/config file?
...
194
Configuration files in python
There are several ways to do this depending on the file format re...
What's the false operator in C# good for?
...amp;&.
For example, look at this code (from http://ayende.com/blog/1574/nhibernate-criteria-api-operator-overloading - where I found out about this trick; archived version by @BiggsTRC):
public static AbstractCriterion operator &(AbstractCriterion lhs, AbstractCriterion rhs)
{
retur...
JavaScript: Class.method vs. Class.prototype.method
... |
edited Oct 28 '09 at 4:19
answered Oct 28 '09 at 4:08
...
Which characters need to be escaped in HTML?
...
4 Answers
4
Active
...