Tag：Transfer data
-
Time：2021-9-21
4-1 establishment of basic structure of movie poster example code import ‘package:flutter/material.dart’; //Void is the main method with no return value, calling myapp, so pass the data here void main() => runApp(MyApp()); //Define a widget class MyApp extends StatelessWidget { final List<String> items; //The default parameter of the constructor is the key primary key, and […]
-
Time：2021-9-10
Vue basic introduction notes 13 Pass value from parent component to child component: prop is a user-defined attribute used by parent component to pass data. Subcomponents need to explicitly declare “prop” with the props option: Pass method from parent component to child component:@Method name = parent componentMethod subcomponent passed$this. Emit (‘method name ‘, [transitive parameter]) […]
-
Time：2021-8-30
The official account is simply transported to the site. The first bullet is a drag and drop text box. Drag and drop text box allows users to determine input by dragging alternatives to the text box. In fact, it can also be said to be a deformation of ComboBox. Compared with combobox, this component allows […]
-
Time：2021-8-27
Handling official account Multi select is a UI element that lists all options and allows users to use Ctrl / shift to make multiple selections. This is a common design element. Sometimes, in order to save space, we will collapse the options in combo box. In order to facilitate user operation, this component will also […]
-
Time：2021-8-23
Sortable & searchable tables are commonly used in web page and form design. Users can click the header to sort the tables in the order or descending order of the column, or use the search box to filter the table content. This component has been used in X-ray diffraction analysis app, extract graph data app […]
-
Time：2021-8-19
1. Components Component is one of the most powerful functions of vue.js. Components can extend HTML elements and encapsulate reusable code. 1.1 component registration 1.1.1 global registration Vue. Component (‘component name ‘, {}) the first parameter is the label name, and the second parameter is an option objectAfter the global component is registered, any Vue […]
-
Time：2021-6-6
In the development project of front-end and back-end separation, there will be such and such problems when front-end and back-end joint debugging, especially in the program of fetching data. Sometimes the front-end to the back-end is clearly correct, but it is unable to get the correct data. Now Xiaoqian will explain the three common data […]
-
Time：2021-6-5
This paper mainly introduces the basic use of binary protocol gob and msgpack. Recently, when writing a session service of gin framework, we encountered a problem. The number types (integer, floating point, etc.) stored in the JSON package of go language in the serialized empty interface are serialized into float64 type. We construct a structure […]
-
Time：2021-4-30
On April 29, 2020, the androidx. fragment:fragment : version 1.3.0-alpha 04, the modified version discards the previous fragment data transmission mode and adds a new API, as shown in the figure below In the past, fragments should have been used to transfer data. There are many ways to obtain fragment instances, arguments, callbacks, and […]
-
Time：2021-3-6
catalog:Source code analysis of Android jar / Library Bolts： effect: It is used to chain execute cross thread code and transfer data Chestnut: Task.call(new Callable() { @Override public Boolean call() throws Exception { return true; } }, Task.UI_THREAD_EXECUTOR); Task.callInBackground(new Callable() { @Override public Boolean call() throws Exception { return false; } }); Task.callInBackground(new Callable() { […]
-
Time：2021-2-24
Before TCP starts to transmit data, the client and server need torandomGenerate their own initial sequence number (ISN), and then exchange confirmation through three handshakes. Question: why is the ISN random? Consider the scenario, B is the server, a is a legal client, C counterfeits a (such as analog IP) to communicate with B. Because […]
-
Time：2021-1-15
Note: for the sake of brevity, this article only deals with some key codes and structures. Recommended download source code, see the detailed implementation. 1.1 INTRODUCTION Part 1 completes the “handshake”, Part 2 completes the “heartbeat” information, Part 3 loads the matching file, and Part 4 completes the operation of the local database. Next, we […]
