大约有 42,000 项符合查询结果（耗时：0.0341秒） [XML]
What is Weak Head Normal Form?
...re not in normal form:
1 + 2 -- we could evaluate this to 3
(\x -> x + 1) 2 -- we could apply the function
"he" ++ "llo" -- we could apply the (++)
(1 + 1, 2 + 2) -- we could evaluate 1 + 1 and 2 + 2
Weak head normal form
An expression in weak head normal ...
How to set versionName in APK filename using gradle?
...ultConfig {
applicationId "com.company.app"
minSdkVersion 13
targetSdkVersion 21
versionCode 14 // increment with every release
versionName '1.4.8' // change with every release
setProperty("archivesBaseName", "MyCompany-MyAppName-$versionName")...
Use a list of values to select rows from a pandas dataframe [duplicate]
...
1273
You can use isin method:
In [1]: df = pd.DataFrame({'A': [5,6,3,4], 'B': [1,2,3,5]})
In [2]: d...
sqlite3-ruby install error on Ubuntu
I have the following error during sqlite3-ruby install:
19 Answers
19
...
Pandas index column title or name
...
394
You can just get/set the index via its name property
In [7]: df.index.name
Out[7]: 'Index Tit...
Iterator invalidation rules
... the iterators and references before the insertion point remain valid. [26.3.11.5/1]
With respect to the reserve function, reallocation invalidates all the references, pointers, and iterators referring to the elements in the sequence. No reallocation shall take place during insertions that happen af...
Could not locate Gemfile
...
JoniJoni
2,85733 gold badges2121 silver badges2222 bronze badges
...
What's the u prefix in a Python string?
...
You're right, see 3.1.3. Unicode Strings.
It's been the syntax since Python 2.0.
Python 3 made them redundant, as the default string type is Unicode. Versions 3.0 through 3.2 removed them, but they were re-added in 3.3+ for compatibility wi...
Finding the mode of a list
...
vinzee
7,44399 gold badges3131 silver badges4848 bronze badges
answered Jan 24 '15 at 20:08
David DaoDavid Dao
...
How to slice an array in Bash
...
317
See the Parameter Expansion section in the Bash man page. A[@] returns the contents of the arr...