大约有 44,000 项符合查询结果（耗时：0.0491秒） [XML]
Extract a substring according to a pattern
...we create a data frame with two columns, one for the part before the colon and one for after, and then extract the latter.
library(dplyr)
library(tidyr)
library(purrr)
DF <- data.frame(string)
DF %>%
separate(string, into = c("pre", "post")) %>%
pull("post")
## [1] "E001" "E002" "E00...
Build the full path filename in Python
...odule. How do I build the file path from a directory name, base filename, and a file format string?
4 Answers
...
How can I debug git/git-shell related problems?
...
How and where to set this variables?
– Hunsu
Jan 15 '16 at 8:28
...
Can a unit test project load the target application's app.config file?
...to play around with the .testrunconfig at all.
– Rowland Shaw
Jan 14 '09 at 12:20
13
@Rowland if ...
Databinding an enum property to a ComboBox in WPF
...L:
xmlns:my="clr-namespace:namespace_to_enumeration_extension_class
and then...
<ComboBox
ItemsSource="{Binding Source={my:Enumeration {x:Type my:Status}}}"
DisplayMemberPath="Description"
SelectedValue="{Binding CurrentStatus}"
SelectedValuePath="Value" />
And...
Scala equivalent of Java java.lang.Class Object
...ng the same information from an instance of the type.
However, classOf[T] and getClass return slightly different values, reflecting the effect of type erasure on the JVM, in the case of getClass.
scala> classOf[C]
res0: java.lang.Class[C] = class C
scala> c.getClass
res1: java.lang.Class[_] ...
*.h or *.hpp for your class definitions
...atic code formatting, you might have different guidelines for formatting C and C++ code. If the headers are separated by extension you can set your editor to apply the appropriate formatting automatically
Naming, I've been on projects where there were libraries written in C and then wrappers had bee...
How to wait for a BackgroundWorker to cancel?
...
If I understand your requirement right, you could do something like this (code not tested, but shows the general idea):
private BackgroundWorker worker = new BackgroundWorker();
private AutoResetEvent _resetEvent = new AutoResetEvent(fa...
How to get the anchor from the URL using jQuery?
...
You can use the .indexOf() and .substring(), like this:
var url = "www.aaa.com/task1/1.3.html#a_1";
var hash = url.substring(url.indexOf("#")+1);
You can give it a try here, if it may not have a # in it, do an if(url.indexOf("#") != -1) check like t...
VIM Replace word with contents of paste buffer?
I need to do a bunch of word replacements in a file and want to do it with a vi command, not an EX command such as :%s///g . I know that this is the typical way one replaces the word at the current cursor position: cw<text><esc> but is there a way to do this with the contents of the u...