大约有 44,500 项符合查询结果（耗时：0.0322秒） [XML]
How can I debug git/git-shell related problems?
...
217
For even more verbose output use following:
GIT_CURL_VERBOSE=1 GIT_TRACE=1 git pull origin ma...
Can dplyr package be used for conditional mutating?
...
220
Use ifelse
df %>%
mutate(g = ifelse(a == 2 | a == 5 | a == 7 | (a == 1 & b == 4), 2,
...
Python creating a dictionary of lists
...
286
You can use defaultdict:
>>> from collections import defaultdict
>>> d = de...
Ruby 2.0.0p0 IRB warning: “DL is deprecated, please use Fiddle”
...ions of Ruby, removed all of my gems
(including Rails), and installed Ruby 2.0. In other words, a totally clean re-install. Upon starting IRB, I received this message:
...
Operation on every pair of element in a list
...
233
Check out product() in the itertools module. It does exactly what you describe.
import itert...
C++/COM VARIANT实现二维数组 - C/C++ - 清泛网 - 专注C/C++及内核技术
...，包括设置数组元素的类型、数据的维数，大小等。
（2）对SAFEARRAY数组赋值，既可通过SafeArrayPutElement函数逐个元素进行负责，也可通过指针来获得SAFEARRAY的数据地址，然后对指针指向的值进行赋值操作。其中，如果SAFEARRAY中...
WinDBG用法详解 PDF - 文档下载 - 清泛网 - 专注C/C++及内核技术
.....................................................................1
30.1.2内容............................................................................................................................2
30.1.3存储.................................................................................
App Inventor 2 中的“2”是什么意思？ - App Inventor 2 中文网 - 清泛网 ...
App Inventor 2 中的“2”是什么意思？app_inventor_2_interpretation对App Inventor 2 中的“2”进行科普性的释义，相对App Inventor进行适度的区分。2010年12月App Inventor对外公测，此版本也称为App Inventor 1 或 App Inventor Classic，简称AI1。
2013年12月...
How to split a column into two columns?
... row
0 00000 UNITED STATES
1 01000 ALABAMA
2 01001 Autauga County, AL
3 01003 Baldwin County, AL
4 01005 Barbour County, AL
df = pd.DataFrame(df.row.str.split(' ',1).tolist(),
columns = ['flips','row'])
flips ...