我对python很新,我目前正在尝试创建一个带边框的游戏板。到目前为止我有:
for row in range(5):
print('-'*50)
for col in range(5):
print('| {:<5}{:<3}'.format(row, col), end = '')
print()
这给了我:
--------------------------------------------------
| 0 0 | 0 1 | 0 2 | 0 3 | 0 4
--------------------------------------------------
| 1 0 | 1 1 | 1 2 | 1 3 | 1 4
--------------------------------------------------
| 2 0 | 2 1 | 2 2 | 2 3 | 2 4
--------------------------------------------------
| 3 0 | 3 1 | 3 2 | 3 3 | 3 4
--------------------------------------------------
| 4 0 | 4 1 | 4 2 | 4 3 | 4 4
我的问题是行的末尾没有一行,最后一行下面没有虚线。当我输入end ='|'我最后得到一条线,但中间还有双线,如:
--------------------------------------------------
| 0 0 || 0 1 || 0 2 || 0 3 || 0 4 |
--------------------------------------------------
| 1 0 || 1 1 || 1 2 || 1 3 || 1 4 |
--------------------------------------------------
| 2 0 || 2 1 || 2 2 || 2 3 || 2 4 |
--------------------------------------------------
| 3 0 || 3 1 || 3 2 || 3 3 || 3 4 |
--------------------------------------------------
| 4 0 || 4 1 || 4 2 || 4 3 || 4 4 |
我不知道如何刊登最后一条虚线。
我需要做些什么才能在两端和中间获得一条线? 如何在最后一行下面加一条虚线? 任何帮助表示赞赏。
答案 0 :(得分:0)
您可以使用以下代码实现此特定格式:
@Component({
selector: 'my-app',
template: `
<ul>
<li *ngFor="let item of collection;trackBy: trackByFn">{{item.id}}</li>
</ul>
<button (click)="getItems()">Refresh items</button>
`,
})
export class App {
constructor() {
this.collection = [{id: 1}, {id: 2}, {id: 3}];
}
getItems() {
this.collection = this.getItemsFromServer();
}
getItemsFromServer() {
return [{id: 1}, {id: 2}, {id: 3}, {id: 4}];
}
trackByFn(index, item) {
return index; // or item.id
}
}
输出:
*ngFor="let item of collection; trackBy:index"
*ngFor="let item of collection; let i = index; trackBy:i"