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Accessing nested JavaScript objects and arays by string path
...
I just made this based on some similar code I already had, it appears to work:
Object.byString = function(o, s) {
s = s.replace(/\[(\w+)\]/g, '.$1'); // convert indexes to properties
s = s.replace(/^\./, ''); // strip a lea...
How to read a single character from the user?
...
Also worth trying is the readchar library, which is in part based on the ActiveState recipe mentioned in other answers.
Installation:
pip install readchar
Usage:
import readchar
print("Reading a char:")
print(repr(readchar.readchar()))
print("Reading a key:")
print(repr(readchar....
Why is Go so slow (compared to Java)?
...these and found them to be mostly OK. I think the results can be used as a base for estimations.
– Agoston Horvath
Apr 7 '16 at 15:11
...
Storing Image Data for offline web application (client-side storage database)
...https://github.com/ismyrnow/Leaflet.functionaltilelayer
I compared the DB-based tiles layer with a purely local (localhost://) storage
There is no noticeable difference in performance! between using IndexedDB and local files!
Results
Chrome: Fetch (6.551s), Store (8.247s), Total Elapsed Time: (...
How to install PyQt4 on Windows using pip?
...n 3.5, etc.
Since Qt is a more complicated system with a compiled C++ codebase underlying the python interface it provides you, it can be more complex to build than just a pure python code package, which means it can be hard to install it from source.
Make sure you grab the correct Windows wheel f...
How to check file MIME type with javascript before upload?
...e as fallback
break;
}
Accept or reject file uploads as you like based on the MIME types expected.
Demo
Here is a working demo for local files and remote files (I had to bypass CORS just for this demo). Open the snippet, run it, and you should see three remote images of different types...
What's the best way to set a single pixel in an HTML5 canvas?
...ng drawImage() to show it:
var img = new Image;
img.src = "data:image/png;base64," + myPNGEncoder(r,g,b,a);
// Writing the PNGEncoder is left as an exercise for the reader
creating another img or canvas filled with all the pixels you want and use drawImage() to blit just the pixel you want across....
jumpserver-华为云免费堡垒机解决方案 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...bak
mv * /etc/yum.repos.d/bak/
wget http://mirrors.163.com/.help/CentOS6-Base-163.repo
yum clean all
yum makecache
如果是REHL需要修改
1.删除redhat原有的yum
rpm -aq|grep yum|xargs rpm -e --nodeps
2.下载yum安装文件
wget http://mirrors.163.com/centos/6.7/os/x86_64/Pack...
C++, What does the colon after a constructor mean? [duplicate]
...aid, it's an initialisation list. You can use it for two things:
Calling base class constructors
Initialising member variables before the body of the constructor executes.
For case #1, I assume you understand inheritance (if that's not the case, let me know in the comments). So you are simply ca...
How to get the list of all printers in computer
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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