Can I use list comprehension syntax to create a dictionary? For example, by iterating over pairs of keys and values: d = {… for k, v in zip(keys, values)} 1 17 Use a dict comprehension (Python 2.7 and later): {key: value for (key, value) in iterable} Alternatively for simpler cases or earlier version of Python, … Read more
I want to combine these: keys = [‘name’, ‘age’, ‘food’] values = [‘Monty’, 42, ‘spam’] Into a single dictionary: {‘name’: ‘Monty’, ‘age’: 42, ‘food’: ‘spam’} 1 18 Use zip to create a list of (key, value) tuples, then apply the dict constructor: keys = [‘a’, ‘b’, ‘c’] values = [1, 2, 3] dictionary = dict(zip(keys, … Read more
I am relatively new to Java, and often find that I need to sort a Map<Key, Value> on the values. Since the values are not unique, I find myself converting the keySet into an array, and sorting that array through array sort with a custom comparator that sorts on the value associated with the key. … Read more
I’ve seen a few different ways to iterate over a dictionary in C#. Is there a standard way? 2 29 foreach(KeyValuePair<string, string> entry in myDictionary) { // do something with entry.Value or entry.Key }
If I have an object implementing the Map interface in Java and I wish to iterate over every pair contained within it, what is the most efficient way of going through the map? Will the ordering of elements depend on the specific map implementation that I have for the interface? 4 46
How do you create a dictionary in Java? [closed]
Is there a way to delete an item from a dictionary in Python? Additionally, how can I delete an item from a dictionary to return a copy (i.e., not modifying the original)? 1 18
Is there a simple way to determine if a variable is a list, dictionary, or something else? I am getting an object back that may be either type and I need to be able to tell the difference. 1 15
I have a list of dictionaries and want each item to be sorted by a specific value. Take into consideration the list: [{‘name’:’Homer’, ‘age’:39}, {‘name’:’Bart’, ‘age’:10}] When sorted by name, it should become: [{‘name’:’Bart’, ‘age’:10}, {‘name’:’Homer’, ‘age’:39}] 1 18
Is there a one-line way of deleting a key from a dictionary without raising a KeyError? if ‘key’ in my_dict: del my_dict[‘key’] 1 15
