Native JS carousel
Native JS carousel
Today write a native JS write carousel JS effect.
Implementation principle:
1. Create an array to write the corresponding z-index, opacity, top, width for each picture;
2. The operation to realize rotation is to put the first group of values in the built array into the last group, and click the button to execute once.
Display ...
Added by PHPnewby! on Fri, 03 Jan 2020 17:53:24 +0200
Distributed Lock Implemented by Single-machine redis in springboot
Distributed locks are often required in microservices to perform some tasks.For example, deleting expired data periodically requires only one to execute in multiple services.
The following describes distributed locks in a less rigorous sense, because redis implements distributed locks in a rigorous sense or is more complex, using the following ...
Added by RickyF on Fri, 03 Jan 2020 09:02:48 +0200
Data filtering details and examples of Rxjava2 Observable
Continue to the previous article: Data filtering details and examples of Rxjava2 Observable (1)
6. Filter
Only data items filtered by the function are emitted.
Instance code:
// filter(Predicate<? super Integer> predicate)
// Verify data and decide whether to transmit data
Observable.range(1, 10)
.filter(new Predicate<Integer> ...
Added by sk8erh4x0r on Thu, 02 Jan 2020 23:31:44 +0200
Regular expression query MySQL data
Note: the key to using regular expressions is REGEXP
1. Query records that start with a specific character or string
The character "^" matches the text at the beginning of a specific character or string
#In the fruits table, query the records whose f ﹣ name field begins with the letter b
MariaDB [vincen]> selec ...
Added by pucker22 on Thu, 02 Jan 2020 18:54:59 +0200
Animation principle of JavaScript
Basic principle of animation: box target position = box current position + step size
Key knowledge: timer
Specific code:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Basic principles of animation</title>
<style>
.box {
width: 200 ...
Added by HSKrustofsky on Wed, 01 Jan 2020 23:53:52 +0200
JavaScript learning notes 008-this0arguments0 arrow function
Author: Mr. Liu Shangyuan
Give no less than any effort
May all our efforts be lived up to
Never forget why you started, and your mission can be accomplished.
Learn from the beginning to the end
You've heard the story of a bear breaking a stick
They think bear is stupid
I don't think I'll ever do that
But they often do things like ...
Added by Guernica on Wed, 01 Jan 2020 23:41:24 +0200
POJ-3164 Command Network (Zhu Liu algorithm)
This is a template problem of minimum tree graph
At the beginning of Zhu Liu's algorithm, it wasn't easy to understand. I read a lot of articles on the Internet to understand it.
In this case, if the V-point of arc (u,v) is in a ring, and the number of the V-point formed by the ring is k in the new graph, then the weight of ( ...
Added by chancho on Wed, 01 Jan 2020 06:27:24 +0200
android uri to bitmap image and compress
Many people will use Media.getBitmap in onActivityResult to get the returned pictures when they call the gallery to select pictures, as follows:
Uri mImageCaptureUri = data.getData();
Bitmap photoBmp = null;
if (mImageCaptureUri != null) {
photoBmp = MediaStore.Images.Media.getBitmap(ac.getContentResolver(), mImageCaptureU ...
Added by exploo on Wed, 01 Jan 2020 05:53:07 +0200
JavaScript Basics - basic data types and basic process control
JavaScript foundation 1
JavaScript foundation 1
1, Basic data type
1.Number
2.String
3.Null
4.Undefined
5.true or false
2, Common methods of string
1. Parse string number
2. Text common operation API
Three, array
1. Array definition
2. Array operation
4, Basic process control
1. branch
2. cycle
...
Added by ofirf96 on Wed, 01 Jan 2020 04:27:51 +0200
360 search test case of unit test framework of Python 3 selenium automation
**I wrote the unit test framework of Baidu search**
Python 3 selenium automation unit test Baidu search example details
The previous article is relatively simple, and it is not often used in practical applications. The previous article is not parameterized.
Today, I'll talk about the commonly used parameterizatio ...
Added by cptn_future on Tue, 31 Dec 2019 19:48:51 +0200