Tag: flat

[API should return a tree structure] The database table structure is flat data, but the API should implement tree structure display. API implements the structure of a tree. How to implement it recursively? How to recurse

The data in the database is tiled, row by row, but the data to be queried by the API requires a tree structure. How to convert tiled data into a tree structure? public List<CarbonRepo> findCarbonRepo(Integer type){ // 1. Find all the data first. The baseFindList method is to query the database and return a list […]

Android intermediate-getSystemService and LayoutInflater

getSystemService and LayoutInflater Use container management singleton pattern getSystemService() LayoutInflater Use container management singleton mode Unify the management of singletons, hide the implementation, create them the first time they are obtained, and obtain them directly from the cache next time to avoid repeated creation of objects. class SingletonManager { private static Map<String, Object> sMap = […]

APEX: Application flattening technology that opens a new chapter for Android systems

Android Pony Express (APEX) is a container format introduced in Android Q for updates of lower-level system modules during the installation process. The format facilitates updates to system components that do not fit into the standard Android application model. Some example components include native services and libraries, hardware abstraction layers (HALs), runtimes (ART), and class […]

APEX: Application flattening technology that opens a new chapter for Android systems

APEX: Application flattening technology that opens a new chapter for Android systems Android Pony Express (APEX) is a container format introduced in Android Q for updates of lower-level system modules during the installation process. The format facilitates updates to system components that do not fit into the standard Android application model. Some example components include […]

[The art of thinking in responsive programming] (3) The algebraic theory Monad behind flatMap

[Abstract] This article is the study notes of this article Rxjs Responsive Programming – Chapter 2: In-depth Study of Sequences. Sample code is hosted at: http://www.github.com/dashnowords/blogs 1. Highlights Some basic operators used in this article: map – mapping filter-Filter reduce-finite column aggregation scan-unlimited column aggregation flatMap-flattening operation (key point) catch-catch errors retry – Sequence retry […]

2023.03.20P4710 “Physics” Flat throwing motion

Question portal: [Luogu] P4710 [Physics] Flat throwing motion Step 1: Pre-package cheese Here are the cheeses you need to know and understand: math: Trigonometric functions; physics: acceleration formula; Displacement formula; So if you don’t know the above cheese, then please continue reading below; if you already know the above cheese, then please skip to “Step […]

Create a flat tree structure rendering table based on Vue + element (dynamic row and column merging, tree structure algorithm application)

Precondition, the back-end data is a flattened tree structure Achieve the desired effect: 1. Introduction to methods and their uses 1) Flat to tree and tree to flat, the table component of element-ui starts rendering from array index 0 to the end. If the backend does not transmit data in order, the table will be […]

Qt writes custom controls-flatten flatui

1. Preface For current front-end developers, FlatUI is definitely no stranger. In recent years, flat design has become more and more popular. Probably because the resolution of PC and mobile devices is getting higher and higher, flat design looks more attractive. People are happy, and the textured colors produced through gradient colors are not as […]

Caused by: android.view.InflateException: Binary XML file line

1. Exception information Process: com.example.devbytes, PID: 32509 android.view.InflateException: Binary XML file line #23 in com.example.devbytes:layout/devbyte_item: Binary XML file line #23 in com.example.devbytes:layout/devbyte_item: Error inflating class com.google.android.material .card.MaterialCardView Caused by: android.view.InflateException: Binary XML file line #23 in com.example.devbytes:layout/devbyte_item: Error inflating class com.google.android.material.card.MaterialCardView 2. Analysis process According to the search and analysis, we can know that it […]