大约有 47,000 项符合查询结果（耗时：0.0641秒） [XML]
Comparing arrays in JUnit assertions, concise built-in way?
...
302
Use org.junit.Assert's method assertArrayEquals:
import org.junit.Assert;
...
Assert.assertArr...
How to display the current year in a Django template?
...is the inbuilt template tag to display the present year dynamically. Like "2011" what would be the template tag to display that?
...
Set time part of DateTime in ruby
...
221
Within a Rails environment:
Thanks to ActiveSupport you can use:
DateTime.now.midnight
DateT...
Map and Reduce in .NET
...ferent names.
Map is Select:
Enumerable.Range(1, 10).Select(x => x + 2);
Reduce is Aggregate:
Enumerable.Range(1, 10).Aggregate(0, (acc, x) => acc + x);
Filter is Where:
Enumerable.Range(1, 10).Where(x => x % 2 == 0);
https://www.justinshield.com/2011/06/mapreduce-in-c/
...
How to increment a pointer address and pointer's value?
...
|
edited Mar 12 '18 at 15:52
Zaid Khan
67222 gold badges88 silver badges2121 bronze badges
a...
Remove 'a' from legend when using aesthetics and geom_text
...nd = FALSE)
The argument show_guide changed name to show.legend in ggplot2 2.0.0 (see release news).
Pre-ggplot2 2.0.0:
With show_guide = FALSE like so...
ggplot( data=iris, aes(x=Sepal.Length, y=Sepal.Width , colour = Species , shape = Species, label = Species ) , size=20 ) +
geom_point()+
...
Replace specific characters within strings
...
With a regular expression and the function gsub():
group <- c("12357e", "12575e", "197e18", "e18947")
group
[1] "12357e" "12575e" "197e18" "e18947"
gsub("e", "", group)
[1] "12357" "12575" "19718" "18947"
What gsub does here is to replace each occurrence of "e" with an empty string ""....
Rails: convert UTC DateTime to another time zone
...
207
time.in_time_zone(time_zone)
Example:
zone = ActiveSupport::TimeZone.new("Central Time (US ...