我正在尝试使用可教机器网站上的代码:
from keras.models import load_model
from PIL import Image, ImageOps
import numpy as np
# Load the model
model = load_model('keras_model.h5')
# Create the array of the right shape to feed into the keras model
# The 'length' or number of images you can put into the array is
# determined by the first position in the shape tuple, in this case 1.
data = np.ndarray(shape=(1, 224, 224, 3), dtype=np.float32)
# Replace this with the path to your image …Run Code Online (Sandbox Code Playgroud) 重要的!这不是异步 API 的问题!我尝试创建一个冒泡排序可视化器,当我运行算法本身时,我希望用户实际看到它的运行情况。所以每次我进行交换时,我都希望用户能够看到它发生。当bubbleSort运行内部的循环并更新状态Classes和 时Array,没有任何反应,直到循环完全结束。如果我将 abreak;放入循环中,则在循环停止时反应渲染。问题是什么?我该如何解决?
编辑:
如果你有答案,请解释它为什么起作用,以及我应该如何在我的代码中实现它。
import React, { useState, useEffect } from "react";
import "./SortingVisualizer.css";
import { render } from "@testing-library/react";
const SortingVisualizer = () => {
const [getArray, setArray] = useState([]);
const [getClasses, setClasses] = useState([""]);
useEffect(() => {
resetArray(200);
}, []);
useEffect(() => {}, [getArray, getClasses]);
const resetArray = size => {
const array = [];
const classesArray = [];
for (let i = 0; i < size; …Run Code Online (Sandbox Code Playgroud) 我正在 ReactJS 中编写一个排序可视化工具,我使用一个状态来保持每次渲染之间的延迟。当我更改延迟滑块时,排序不会更新。我让它记录更新的值,并且在每个循环中我让它记录它读取的值。出于某种原因,当我阅读getDelay循环内部和外部时,它们是不同的。
这是代码:
import React, { useState, useEffect } from "react";
import "./SortingVisualizer.css";
class Bar {
constructor(value, className) {
this.value = value;
this.className = className;
}
}
const SortingVisualizer = () => {
const [getArray, setArray] = useState([Bar]); //array to hold the bars
const [getSlider, setSlider] = useState(50);
const [getDelay, setDelay] = useState(2);
//reset the array at the start
useEffect(() => {
resetArray(10);
}, []);
//function to reset the array
const resetArray = () => …Run Code Online (Sandbox Code Playgroud)