Background When processing window functions, the ProcessWindowFunction processing function can define three states: rich function getRuntimeContext.getState, Each key + the state context.windowState() of each window, and the state context.globalState of each key, so what is the relationship between these states? The relationship between the three states of the ProcessWindowFunction processing function: 1. The state defined […]
Tag: states
The useReducer of react18’s 05 hook handles state data, including add or sub to operate state data, realize the addition, deletion and modification of a data, and the processing of several login states
Table of Contents The useReducer of react18’s 05 hook handles state data, including add or sub to operate state data, realize the addition, deletion and modification of a data, and the processing of several login states Use of useReducer 01: Normal use of useReducer useReducer.jsx Effect 02: Lazy use of useReducer UseReducer.jsx Effect 03: The […]
Advanced States and Side Effects in Jetpack Compose (Part 1)
Through this party, you will learn How to observe data flow from Compose code to update interface. How to create state containers for stateful composables. Comes with effect APIs such as LaunchEffect, rememberUpdateState, DisposeableEffect, produceState, and derivedStateOf. How to use the rememberCoroutineScope API to create a coroutine in a composable and call a suspending function. […]
(2) Six states and context switching of threads
(2) Six states and context switching of threads 2.1 The status and switching of threads in the operating system 2.2 Six states of threads in Java 01. NEW (the thread has not started yet) 02. RUNNABLE (running) 03. BLOCKED (blocked state) 04. WAITING (waiting state) 05. TIMED_WAITING (timeout waiting state) 06. TERMINATED (termination status) 2.3 […]
[R language data analysis] GDP analysis of China and the United States based on R language (R language big assignment)
Directory 1. Significance of the research 2. Data source 3. Read data read data code Screenshot of running results 4. Data analysis and drawing box plot Build boxplot code Screenshot of running results 5. Build a regression model Build regression model code Screenshot of running results Calculation and inspection of correlation coefficient 6. Regression analysis […]
Implementation of KeyedStateStore in Flink–how to make a Key correspond to a State
Background There are two basic states in Flink: Keyed State and Operator State. Operator State is well understood. A specific Operator operator shares the same state. This is the implementation Layers are well done. But how is Keyed State implemented? Generally speaking, a normal person will think at first glance: a task is bound to […]
Polymorphism – different objects will produce different states when completing a certain behavior
Directory 1. The concept of polymorphism 2. Definition and implementation of polymorphism 1. The conditions for polymorphism: 2. Virtual function **3. Rewriting (covering) of virtual functions 3. The underlying principle of polymorphism 4. Override and final in C++11 5. Comparison of overloading, overriding (rewriting), hiding (redefining) 6. Abstract class Seven, the principle of polymorphism 8. […]
Five basic states of Java multithreading
Directory 1. What is Java multithreading 1.1 Inherit the Thread class 1.2 Implement the Runnable interface Second, the new state of Java multithreading 3. The ready state of Java multithreading Fourth, the running status of Java multithreading Five, the blocking state of Java multithreading 6. The death state of Java multithreading 1. What is Java […]
State pattern thinking – how to use when there are multiple groups of associated states
Preface The State Pattern looks simple at first glance. its definition Allows an object to change its behavior when its internal state changes, the object appears as if it modified its class In the vernacular, it means: The same object has different behaviors in different states I checked my brain and thought it was nothing. […]
State pattern thinking – how to use when there are multiple sets of associated states
Foreword The State Pattern looks simple at first glance. its definition Allows an object to change its behavior when its internal state changes, the object appears as if it modified its class In the vernacular, it means: The same object has different behaviors in different states I checked my brain and thought it was nothing. […]