let cooper=【logo0: "," project0: ","logo1: "," project1: ","logo2: "," project2: ""】 怎么打印到他的空值 还有他的前边的名字
时间: 2023-07-21 19:08:21 浏览: 39
要打印出cooper的空值以及其前边的名字,可以使用以下代码:
```python
cooper = {
'logo0': '',
'project0': '',
'logo1': '',
'project1': '',
'logo2': '',
'project2': ''
}
for key, value in cooper.items():
if value == '':
print(key, "的空值")
else:
print(key, "的值为:", value)
```
这段代码会遍历cooper字典中的每个键值对,如果值为空,则打印出对应的键和"的空值",否则打印出键和值。这样你就可以打印出cooper的空值以及其前边的名字了。
相关问题
let arr={0: 3, 1: 3} 把arr变成【3】
可以使用 Object.values() 方法将对象的值转为数组,然后获取数组的第一个元素即可得到结果。具体代码如下:
```
let arr = {0: 3, 1: 3};
arr = Object.values(arr);
// arr 现在为 [3, 3]
arr = arr.slice(0, 1);
// arr 现在为 [3]
```
注意,由于对象的属性名不是连续的数字,因此它不能被直接转换为数组。我们需要使用 Object.values() 方法来获取对象的值,然后再对数组进行操作。
for n = nmin:2:nmax
The syntax "for n = nmin:2:nmax" is a loop in MATLAB that iterates over the values of "n" starting from "nmin" and incrementing by 2 until it reaches or exceeds "nmax".
During each iteration of the loop, the value of "n" is updated and the code within the loop is executed. This loop is typically used when you want to perform the same set of operations on a range of values of "n".
Here's an example of how you can use this loop to print the values of "n" from 1 to 10, incrementing by 2:
```
nmin = 1;
nmax = 10;
for n = nmin:2:nmax
disp(n);
end
```
This will output:
```
1
3
5
7
9
```
I hope this helps! Let me know if you have any further questions.