The principle of creating dynamic pie chart with path of svg
There are three steps:
Fan shaped
Draw a circle with a fan
Animating
The following three steps are detailed
Fan shaped
As mentioned in the previous article, the command of drawing arc is also used in the previous article. If you don't know clearly, you can go to my previous article: path application of svg , let's briefly mention it here
Fir ...
Posted by RottenBananas on Tue, 22 Oct 2019 18:15:27 -0700
Image filter for canvas pixel operation
Figure after filter:
Implementation principle:
This uses a method of canvas: getImageData , this method can obtain the pixel information of the picture
**CanvasRenderingContext2D**.getImageData(), return a ImageData Constructor to create or use the creation methods of the CanvasRenderingContext2D object with canvas: createImageData() and getIm ...
Posted by undertaker16 on Fri, 18 Oct 2019 18:04:01 -0700
LeetCode-Binary Tree Zigzag Level Order Traversal
Description:
Given a binary tree, return the zigzag level order traversal of its nodes' values. (ie, from left to right, then right to left for the next level and alternate between).
For example:
Given binary tree [3,9,20,null,null,15,7],
3
/ \
9 20
/ \
15 7
return its zigzag leve ...
Posted by hyd_guy on Fri, 18 Oct 2019 10:38:09 -0700
JS learning notes (Chapter 9) (client detection)
1. Capability test
The goal of capability testing is not to identify a specific browser, but to identify the capability of the browser. When possible, try to use typeof for capability testing. To test whether a property of any object exists in the browser environment, use the following function:
function isHostMethod(object,property) {
var ...
Posted by enterume on Wed, 16 Oct 2019 13:39:07 -0700
Infinite Rotary Graph
Today, I wrote the rotation map. The main thing is to train my hands and lay a good foundation for future large projects. At the time of writing, css spent a lot of effort on me. Many of the attributes I had learnt before were forgotten, and many of them were found out. Then when the js part started to ...
Posted by terandle on Sun, 13 Oct 2019 08:10:29 -0700
ODI Consistency CDC (Last Update Date) Synchronized Data Operation Details
ODI operation details
Consistent CDC (Last Update Date) Synchronized Data
Add CDC
1. Check the database version
DECLARE -- Validating KM options
dbVersion1 NUMBER(2,0);
dbVersion2 NUMBER(2,0);
BEGIN
-- Verify RDBMS version
select
case when upper(name) = 'COMPATIBLE' then to_number(substr(value, 1, instr(value, ...
Posted by sudhakararaog on Fri, 11 Oct 2019 19:05:52 -0700
The Basic Principle of Writing Tab with jq Method and Three Methods
Using jq to write tabs, farewell to tedious loops and naming conventions
Basic principles:
1. When a btn is selected, set the background color of the btn to orange and the other brothers to none.
2. If the index of the child div is the same as that of btn, this div will be displayed while other brother divs will be hidden.
Callback function ...
Posted by pspcrazy on Fri, 11 Oct 2019 04:48:09 -0700
HTML Makes Simple Clocks
HTML Makes Simple Clocks
Using HTML, CSS, jQuery, JS to make clocks can get the system time and make the pointers of the clocks change in real time without much code.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width= ...
Posted by ctsttom on Thu, 10 Oct 2019 14:04:50 -0700
NAT Unique Quintuple Selection
When using iptable for nat settings, you can use the following extension options:
# SNAT Source Address Translation, Used in POSTROUTING, INPUT Chain
--to-source [<ipaddr>[-<ipaddr>]][:port[-port]]
--random # Mapping to random port number,
--random-fully # Mapping to Random Port Number (PRNG Completely Randomized)
--persiste ...
Posted by jmosterb on Wed, 09 Oct 2019 12:37:41 -0700
Front-end JS Judgment Browser
Front-end JS Judgment Browser
Now there are many browsers on the market, such as 360, QQ, Sogou and so on. But most of them are based on several existing browser kernels for secondary development. How many kernels are there in the end?
1. Trident Kernel (IE Kernel)
2. Gecko Kernel (FireFox Kernel)
3. ...
Posted by GoodGuy201 on Wed, 09 Oct 2019 07:51:33 -0700