chrome-browser-output chrome-console
在安装了create-react-app软件包之后，创建了web3.js文件并将console.log（web3.version）添加到App.js文件中，出现上述错误，并且不确定如何修复并使其正常工作。
我也尝试了以下方法，但仍然会引发相同的错误。
window.addEventListener('load', async () => {
// Modern dapp browsers...
if (window.ethereum) {
window.web3 = new Web3(ethereum);
try {
// Request account access if needed
await ethereum.enable();
// Acccounts now exposed
web3.eth.sendTransaction({/* ... */});
} catch (error) {
// User denied account access...
}
}
// Legacy dapp browsers...
else if (window.web3) {
window.web3 = new Web3(web3.currentProvider);
// Acccounts always exposed
web3.eth.sendTransaction({/* ... */});
}
// Non-dapp browsers...
else {
console.log('Non-Ethereum browser detected. You should consider trying MetaMask!');
}
});
答案 0 :(得分：0)
如果您尚未致电public class MergeSort {
public static void main(String[] args) {
int[] list = new int[] {3, 7, 5, 2, 9};
int[] result = mergeSort(list, 0, list.length);
System.out.print("[");
for (int i = 0; i < result.length; i++) {
System.out.print(" " + result[i]);
}
System.out.println("]");
}
public static int[] mergeSort(int[] list, int start, int end) {
return F(list, start, end - 1);
}
public static int[] F(int[] list, int start, int end) {
if (end - start < 2) {
return list;
} else {
int mid = (start + end) / 2;
F(list, start, mid);
F(list, mid + 1, end);
merge(list, start, mid, end);
return list;
}
}
public static void merge(int[] list, int start, int mid, int end) {
int[] copy = new int[list.length];
for (int i = 0; i < list.length; i++) {
copy[i] = list[i];
}
int i = start;
int k = start;
int j = mid + 1;
while (i <= mid && j <= end) {
if (copy[i] <= copy[j]) {
list[k] = copy[i];
i++;
} else {
list[k] = copy[j];
j++;
}
k++;
}
while (i <= mid) {
list[k] = copy[i];
i++;
k++;
}
while (j < end) {
list[k] = copy[j];
j++;
k++;
}
}
}
，可能会发生错误。