min

问题 i have the following code to compute minimum and maximum values of a list in order to save memory efficiency x_min = float('+inf') x_max = float('-inf') for p in points_in_list: x_min = min(x_min, p) x_max = max(x_max, p) where points_in_list is a (large) list of numbers. I wish to know if there is a method to compute with a List Comprehensions the min and max value and saving the memory. 回答1: I'm a big fan of generators and comprehensions, but in this case it seems they are not the right way

问题 I have 2 columns and I want a 3rd column to be the minimum value between them. My data looks like this: A B 0 2 1 1 2 1 2 2 4 3 2 4 4 3 5 5 3 5 6 3 6 7 3 6 And I want to get a column C in the following way: A B C 0 2 1 1 1 2 1 1 2 2 4 2 3 2 4 2 4 3 5 3 5 3 5 3 6 3 6 3 7 3 6 3 Some helping code: df = pd.DataFrame({'A': [2, 2, 2, 2, 3, 3, 3, 3], 'B': [1, 1, 4, 4, 5, 5, 6, 6]}) Thanks! 回答1: Use df.min(axis=1) df['c'] = df.min(axis=1) df Out[41]: A B c 0 2 1 1 1 2 1 1 2 2 4 2 3 2 4 2 4 3 5 3 5 3

问题 I have a list of lists like so: [[10564, 15], [10564, 13], [10589, 18], [10637, 39], [10662, 38], [10712, 50], [10737, 15], [10762, 14], [10787, 9], [10812, 12], [10837, 45], [3, 17], [7, 21], [46, 26], [48, 12], [49, 24], [64, 14], [66, 17], [976, 27], [981, 22], [982, 22], [983, 17], [985, 13], [517, 9], [521, 15], [525, 11], [526, 13], [528, 14], [698, 14], [788, 24], [792, 19]] I am trying to find the lowest value for the second element in each list(so compare 15 to 13 to 18 etc not

问题 I made a custom form to display in Wordpress Woocommerce checkout page, where user must select their age before making the purchase. The idea is so that people who are under 18 years old would not be able to make a purchase. Currently, the code displays the form and it is all set, but 'min' and 'max' features, which I would require to limit age insertion between 18 and 99, do not apply for some reason. What do I require in order to make 'min' and 'max' functions to apply? add_action(

问题 I made a custom form to display in Wordpress Woocommerce checkout page, where user must select their age before making the purchase. The idea is so that people who are under 18 years old would not be able to make a purchase. Currently, the code displays the form and it is all set, but 'min' and 'max' features, which I would require to limit age insertion between 18 and 99, do not apply for some reason. What do I require in order to make 'min' and 'max' functions to apply? add_action(

问题 I have a list of dictionaries that I would like to filter based on multiple criteria. A shortened version of the list looks like so: orders = [{"name": "v", "price": 123, "location": "Mars"}, {"name": "x", "price": 223, "location": "Mars"}, {"name": "x", "price": 124, "location": "Mars"}, {"name": "y", "price": 456, "location": "Mars"}, {"name": "z", "price": 123, "location": "Mars"}, {"name": "z", "price": 5623, "location": "Mars"}] I am looking to end up with a list that contains the

问题 I have a list of dictionaries that I would like to filter based on multiple criteria. A shortened version of the list looks like so: orders = [{"name": "v", "price": 123, "location": "Mars"}, {"name": "x", "price": 223, "location": "Mars"}, {"name": "x", "price": 124, "location": "Mars"}, {"name": "y", "price": 456, "location": "Mars"}, {"name": "z", "price": 123, "location": "Mars"}, {"name": "z", "price": 5623, "location": "Mars"}] I am looking to end up with a list that contains the

问题 I am trying to dynamically allocate an array of doubles and set each element to a random value within a range of positive or negative numbers, but I am having difficulty. Right now, I can only figure out how to set numbers 0 - max. Here is what I have so far: double *random_arr(int size, double min, double max) { double *array0 = calloc(size, sizeof(double)); if (array0 == NULL) { exit(1); } for (int i = 0; i < size; i++) array0[i] = (max * rand() / RAND_MAX); return array0; } My best guess:

问题 I am trying to dynamically allocate an array of doubles and set each element to a random value within a range of positive or negative numbers, but I am having difficulty. Right now, I can only figure out how to set numbers 0 - max. Here is what I have so far: double *random_arr(int size, double min, double max) { double *array0 = calloc(size, sizeof(double)); if (array0 == NULL) { exit(1); } for (int i = 0; i < size; i++) array0[i] = (max * rand() / RAND_MAX); return array0; } My best guess:

问题 I have a List of Items: List<Item> items = new List<Item>(); items.add(new Item("cow", 4)); items.add(new Item("pig", 7)); items.add(new Item("dog", 12)); I want to retreive the item with the minimum Value (where the numbers are that Value ). How would I do that? I am trying to avoid a nasty foreach loop. I am looking for something along the lines of: return items.Min(Value); 回答1: You can get the minimum value first, then get the item that has the minimum value: var minValue = items.Min(x =>