大约有 48,000 项符合查询结果（耗时：0.0697秒） [XML]
What are the differences between poll and select?
I am referring to the POSIX standard select and poll system C API calls.
3 Answers
...
Read specific columns from a csv file with csv module?
...is spectacular for dealing with csv files, and the following code would be all you need to read a csv and save an entire column into a variable:
import pandas as pd
df = pd.read_csv(csv_file)
saved_column = df.column_name #you can also use df['column_name']
so if you wanted to save all of the inf...
Static variable inside of a function in C
...o() to the return from foo(); so it would be re-initialized to 5 on every call.
The keyword static acts to extend the lifetime of a variable to the lifetime of the programme; e.g. initialization occurs once and once only and then the variable retains its value - whatever it has come to be - over al...
What are good grep tools for Windows? [closed]
Any recommendations on grep tools for Windows? Ideally ones that could leverage 64-bit OS.
28 Answers
...
How to format numbers by prepending 0 to single-digit numbers?
... @Joseph .75 is transformed in 75.
– Galled
Nov 25 '11 at 22:06
@Galled normally that kind of thing is ...
MongoDB: update every document on one field
I have a collected named foo hypothetically.
4 Answers
4
...
Notepad++ - How can I replace blank lines [duplicate]
...rchMode
Put \r\n\r\n in Find What
Put \r\n in ReplaceWith
Click on Replace All
share
|
improve this answer
|
follow
|
...
Difference between Control Template and DataTemplate in WPF
...
Typically a control is rendered for its own sake, and doesn't reflect underlying data. For example, a Button wouldn't be bound to a business object - it's there purely so it can be clicked on. A ContentControl or ListBox, however,...
git push to specific branch
...I'm a bit confused, I'm using v2.10, when I type git push it tries to push all tracked branches, contrary to what you said ("the remote of the current branch is the default value").
– Roberto
Feb 22 '17 at 0:00
...
What does ||= (or-equals) mean in Ruby?
...threads on the Ruby mailing-list whose only purpose is to collect links to all the other threads on the Ruby mailing-list that discuss this issue.
Here's one: The definitive list of ||= (OR Equal) threads and pages
If you really want to know what is going on, take a look at Section 11.4.2.3 "Abbrevi...