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goo 4 two

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Use front-end Javascript download file

Author: bamboo06 on 17-06-2020, 16:43, views: 133

0 There is often a need to export data to Excel during project development, or to download documents. The simplest way to download is to directly request the file address of the server and download the file through the browser http. But in development, due to project requirements, the address of the file you want to download will not be exposed to the user, and authentication is required to allow the download of the file. What should we do at this time?
Use front-end Javascript download file

Category: Javascript

 

Using fetch for asynchronous requests in JavaScript

Author: bamboo06 on 1-04-2020, 19:14, views: 328

0 In the AJAX era, network requests such as APIs are made through XMLHttpRequest or encapsulated frameworks. The fetch framework now produced is simply to provide more powerful and efficient network requests. Although there are currently a few browser compatibility issues, when we make some asynchronous requests, we can use fetch to make perfect network requests.
Using fetch for asynchronous requests in JavaScript

Category: Javascript

 

8 common pitfalls in JavaScript

Author: bamboo06 on 1-04-2020, 19:02, views: 136

1 javascript uses alphanumeric to sort by default. Therefore, the result of [1,2,5,10] .sort () is [1, 10, 2, 5]. If you want to sort correctly, you should do this: [1,2,5,10] .sort ((a, b) => a-b)
8 common pitfalls in JavaScript

javascript uses alphanumeric to sort by default. So the result of [1,2,5,10] .sort () is [1, 10, 2, 5].

Category: Javascript

 

PHP and UTF-8

Author: bamboo06 on 14-08-2019, 18:43, views: 1219

0 When working with the Unicode character set, use the corresponding function instead of the native string function. For example, if a file is encoded as UTF-8 PHP code, if the strlen() function is wrong, use the mb_strlen() function instead.
PHP and UTF-8

If you use substr to intercept Chinese characters, garbled characters will appear, because substr is intercepted in bytes. That is, UTF-8 encoded Chinese, using substr interception, will only intercept 1/3 Chinese, of course, garbled. When UTF-8 is encoded, a Chinese character is 3 bytes. Similarly, different languages in other countries will produce multi-byte strings, so we use mb_strlen() to handle them.

Category: PHP Scripts

 

PHP security of the password hashing

Author: bamboo06 on 14-08-2019, 18:29, views: 419

0 Never know the user's password, we must encrypt the user's password, and can not save the user's original password directly in the database. Do not limit the user password format. If the format is specified, it may be exploited and cracked by the attacker. Of course, we need to limit the minimum length of the password. It is recommended to use at least 8 bits. The longer the better.
PHP security of the password hashing

For password security, developers need to:
1, absolutely can not know the user's password, we must encrypt the user's password, can not save the user's original password directly in the database.
2, do not limit the user password format, if the format is specified, it is likely to be exploited and cracked by the attacker, of course, we need to limit the minimum length of the password, it is recommended to at least 8 bits, the longer the better.
3, can not send the user password through the mailbox, when we develop the application to retrieve the password, the user password is not notified to the user by email, but the link to reset the password is sent to the user in the form of mail, let the user Go to reset the password.

Category: PHP Scripts

 

Gates: The biggest regret is that I can't do a good mobile phone system

Author: bamboo06 on 2-07-2019, 20:38, views: 627

0 Recently, it was revealed that Gates once again expressed his "great regret" to the Android system when he participated in the exchange activities organized by venture capital company Village Global.
Gates: The biggest regret is that I can't do a good mobile phone system

Gates said that the biggest mistake he made when managing the company was that he did not let Microsoft become the "non-Apple" operating system platform, and let Android rise, which is a $400 billion business.

Category: Internet

 

Pure CSS to make adaptive article pagination

Author: bamboo06 on 21-04-2019, 02:23, views: 1393

0 A pager is one of the front-end components commonly used in web development. It can display data to users in batches. We know that frameworks such as Bootstrap provide very nice tabbed components, but your project may not need Bootstrap, you want to customize a beautiful tab for your own project, so please read this article.
Pure CSS to make adaptive article pagination

This article introduces you to make a beautiful page bar with pure CSS, which can adapt to various mobile screens such as PC and mobile phone. Developers can download the source code and change the css code to customize the style of your own project.

Category: CSS

 

Li Yanhong: China changes technology

Author: bamboo06 on 7-04-2019, 01:57, views: 695

0 CDF Talk (Institute Speech) is an innovative speech event launched by the 20th China Development Forum. The theme of the event is "My Future with China". Twelve representatives from Chinese and foreign outstanding people are invited to share their stories with China. In the first issue, please discuss with Baidu founder, chairman and CEO Li Yanhong "China changes technology."
Li Yanhong: China changes technology

In China, we must make full use of the advantages of data, the advantages of the scene, the advantages of talent, the advantages of capital and the advantages of infrastructure, and push innovation forward.
These innovations can be used not only by China, but also by the world. Through big data, we can create big opportunities for China to contribute technology that belongs to the world.

Category: Internet

 

Implementation of file breakpoint resume by HTML5

Author: bamboo06 on 31-01-2019, 22:10, views: 632

1 HTML5's FILE api has a slice method that splits the BLOB object. The front end obtains the corresponding file through the FileList object, segments the large file according to the specified splitting manner, and then passes it to the back end one by one, and then the back end then splicing the files in a sequence.
Implementation of file breakpoint resume by HTML5

At present, there are two commonly used methods for resuming breakpoints. One is to upload files through the websocket interface, and the other is through ajax. Both methods have their own advantages. Although websocket sounds more high-end, it uses different ones. The other algorithms outside the protocol are basically similar, and the server needs to open the ws interface. Here, the relatively convenient ajax is used to illustrate the idea of uploading the breakpoint.

Category: Javascript / HTML5

 

Core.css - lightweight CSS reset and grid system

Author: bamboo06 on 31-01-2019, 22:03, views: 445

0 Core.css is a very small CSS reset and grid system. If your project is very small, you don't need to use a large css framework such as Bootstrap. You only need less than 4kb core.css, you can have css reset. And grid systems and responsive layouts.
Core.css - lightweight CSS reset and grid system

Core.css uses a .row to represent the rows in the container. If you append a class with the largest width to it, it represents a fixed-width row, otherwise it is a full-screen row. .col represents the column in the container, which divides the width of the container into 12 columns, which is what we often call a 12-grid system. .xs-12 represents a column width of 100%. Similarly, .xs-3 represents a column width of 25% because it requires 4 .xs-3 to reach 100% of the 12 grid. Others are analogously from .xs-1 to xs-12.

Category: CSS