大约有 47,000 项符合查询结果（耗时：0.0600秒） [XML]
How can I dynamically create derived classes from a base class
...ssFactory("SpecialClass", "a b c".split())
>>> s = SpecialClass(a=2)
>>> s.a
2
>>> s2 = SpecialClass(d=3)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "<stdin>", line 8, in __init__
TypeError: Argument d not valid for Sp...
In Vim, how do I delete everything within the double quotes?
...
2 Answers
2
Active
...
Split data frame string column into multiple columns
...
291
Use stringr::str_split_fixed
library(stringr)
str_split_fixed(before$type, "_and_", 2)
...
Order discrete x scale by frequency/value
...tting the levels of the factor on the x-axis. For example:
library(ggplot2)
# Automatic levels
ggplot(mtcars, aes(factor(cyl))) + geom_bar()
# Manual levels
cyl_table <- table(mtcars$cyl)
cyl_levels <- names(cyl_table)[order(cyl_table)]
mtcars$cyl2 <- factor(mtcars$cyl, levels = c...
How to change line width in IntelliJ (from 120 character)
...
IntelliJ IDEA 2018
File > Settings... > Editor > Code Style > Hard wrap at
IntelliJ IDEA 2016 & 2017
File > Settings... > Editor > Code Style > Right margin (columns):
...
Why not abstract fields?
...
folibis
9,63233 gold badges3232 silver badges7777 bronze badges
answered Feb 5 '10 at 22:59
rsprsp
...
How to do a logical OR operation in shell scripting
...
|
edited Apr 26 '18 at 10:40
JohannesM
21122 silver badges1212 bronze badges
answered Nov 6...
How do I remove an array item in TypeScript?
...0
zgue
3,21966 gold badges2929 silver badges3434 bronze badges
answered Mar 8 '13 at 14:06
blorkfishblorkfish
...
Understanding Canvas and Surface concepts
...
225
Here are some definitions:
A Surface is an object holding pixels that are being composited t...
Any way to modify Jasmine spies based on arguments?
...
223
In Jasmine versions 3.0 and above you can use withArgs
describe('my fn', function() {
it('g...