Priority queue and loop queue of JavaScript data structure
Priority queue and loop queue of JavaScript data structure
Priority queue
Priority queue is to add and delete queues based on priority
The minimum priority queue (priority addition, normal dequeue) code is as follows:
function Queue() {
//Initialize queue (using array implementation)
...
Posted by upnxwood16 on Tue, 17 Mar 2020 09:24:20 -0700
Three common binding event methods in JS
In the study of JavaScript, we often encounter the event mechanism of JavaScript, such as event binding, event listening, event delegation (event agent), etc. What do these nouns mean and what are their functions?
Event binding
To make JavaScript respond to user actions, you first bind event handle ...
Posted by theycallmepj on Tue, 17 Mar 2020 02:55:45 -0700
js precise calculation
Catalog
js precise calculation
js precise calculation
var numA = 0.1;
var numB = 0.2;
alert( numA + numB );
0.1 + 0.2 = 0.30000000000000004.
Problem of calculation accuracy error (related to binary).
Almost all programming languages have similar precision errors for the four-way operation of floating-point numbe ...
Posted by rhecker on Mon, 16 Mar 2020 09:17:44 -0700
Scrapy self built IP proxy pool
This blog will realize Worry free agent and National Agency To access and save to Redis database.
The anti crawling measures of worry free agent mainly lie in the inconsistency between the port of the page and the port number of the source code. The reason for the inconsistency is that there is js ...
Posted by kneifelspy on Mon, 16 Mar 2020 06:53:05 -0700
Transition & Animation of Vue
Transition & Animation of Vue
transition
When Vue inserts, updates, or removes DOM, it provides a variety of application transition effects.
Vue provides a built-in transition encapsulation component that wraps the components to achieve the transition effect.
Grammatical format
<transition ...
Posted by gmann001 on Mon, 16 Mar 2020 05:07:01 -0700
Solve the problem that ajax can't move forward, backward or refresh
Solve the problem that ajax can't move forward, backward or refresh
Scenario Description:
At present, the front and back end basically realize the interaction of front and back interface data through ajax, but ajax has a small disadvantage, that is, it does not support the browser "back" and ...
Posted by Chris-the dude on Sun, 15 Mar 2020 20:09:04 -0700
ffplay -- source code analysis: code architecture
/* Minimum SDL audio buffer size, in samples. */
// Minimum audio buffer
#define SDL_AUDIO_MIN_BUFFER_SIZE 512
/* Calculate actual buffer size keeping in mind not cause too frequent audio callbacks */
// To calculate the actual audio buffer size, you do not need to call back too often. The maximum numb ...
Posted by swatisonee on Sun, 15 Mar 2020 04:47:17 -0700
vue entry notes (entry notes for novices)
Vue Day 02
Article directory
Vue Day 02
1, ES6 syntax supplement
1.1.let/var (define variable)
1.2.const
1.3. Object enhanced writing
2, Event monitoring
3, Condition judgment
3.1.1. Introduction to if basic syntax
3.1.2. case
3.1.3. Use of v-show
4, Loop traversal
4.1.1. Loop through array
4. ...
Posted by runestation on Sun, 15 Mar 2020 03:16:35 -0700
JS node access add, delete, modify and query (attach node access compatibility writing method of low version browser)
Node access add, delete, modify and query
And get page element type, but node operation uses node level relationship to get elements
Getting elements by parent-child sibling relationship
Logical, but less compatible
Generally, a node has at least three basic attributes: nodeType, nodeName and nodeVal ...
Posted by jek1134 on Sat, 14 Mar 2020 20:50:20 -0700
Open () and close () windows in JavaScript
close() closes the window, the grammar is written as follows, and then close() closes the window while opening a new one, so you can't see the open window
1 window.close(); //Close this window
2 <Window Object>.close();//Close the specified window
Code Display:
1 <!DOCTYPE html>
2 <html>
3 <head>
4 <meta c ...
Posted by thewitt on Sat, 14 Mar 2020 09:46:47 -0700