大约有 40,000 项符合查询结果（耗时：0.0516秒） [XML]
Mean per group in a data.frame [duplicate]
... object. It’s easier to do what you’re after with dplyr: d %>% group_by(Name) %>% mutate(mean1=mean(Rate1), mean2=mean(Rate2))
– jbaums
May 29 '19 at 9:48
...
BeautifulSoup Grab Visible Webpage Text
...autifulSoup
from bs4.element import Comment
import urllib.request
def tag_visible(element):
if element.parent.name in ['style', 'script', 'head', 'title', 'meta', '[document]']:
return False
if isinstance(element, Comment):
return False
return True
def text_from_html(...
Running V8 Javascript Engine Standalone
...
and if your on x86_64 do a: 'scons arch=x64' until its fixed in trunk code.google.com/p/v8/issues/detail?id=429#c1
– EdH
Sep 19 '11 at 3:15
...
Equation for testing if a point is inside a circle
If you have a circle with center (center_x, center_y) and radius radius , how do you test if a given point with coordinates (x, y) is inside the circle?
...
Java - get pixel array from image
... BGR ordering. You should check the incoming BufferedImage's type e.g. TYPE_INT_RGB or TYPE_3BYTE_BGR and handle appropriately. This is one of the things that getRGB() does for you, that makes it slower :-(
– millhouse
Mar 30 '15 at 4:58
...
GitHub: Permission denied (publickey). fatal: The remote end hung up unexpectedly
... this solution seems very close to what has already been posted by learner_19
– Erik
Sep 17 '14 at 7:49
add a comment
|
...
Solving a “communications link failure” with JDBC and MySQL [duplicate]
...it comment by adding "#" sign at the beginning of that line.
change "wait_timeout" and "interactive_timeout"
Add these lines to the MySQL config file:
wait_timeout = number
interactive_timeout = number
connect_timeout = number
Make sure Java isn't translating 'localhost' to [:::1] instead o...
How can I make a div stick to the top of the screen once it's been scrolled to?
...xample link you gave is so much clean and clear that I can't even see it! -_-
– sohaiby
May 14 '15 at 14:50
|
show 2 more comments
...
write a shell script to ssh to a remote machine and execute commands
...
This work for me.
Syntax : ssh -i pemfile.pem user_name@ip_address 'command_1 ; command 2; command 3'
#! /bin/bash
echo "########### connecting to server and run commands in sequence ###########"
ssh -i ~/.ssh/ec2_instance.pem ubuntu@ip_address 'touch a.txt; touch b.txt; s...
How to remove padding around buttons in Android?
...s.
<android.support.design.button.MaterialButton
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:insetTop="0dp"
android:insetBottom="0dp"
android:text="@string/view_video"
android:textColor="@color/white"/>
...