Best way to remove elements from a list - Stack Overflow This makes indexing a list a[i] an operation whose cost is independent of the size of the list or the value of the index When items are appended or inserted, the array of references is resized Some algorithm is applied to improve the performance of appending items repeatedly; when the array must be grown, some extra space is allocated so the
python - How to convert list to string - Stack Overflow Agree with @Bogdan This answer creates a string in which the list elements are joined together with no whitespace or comma in between You can use ', ' join(list1) to join the elements of the list with comma and whitespace or ' ' join(to) to join with only white space –
How do I get the length of a list? - Stack Overflow item_count = 0 for item in list: item_count += 1 return item_count count([1,2,3,4,5]) (The list object must be iterable, implied by the for in stanza ) The lesson here for new programmers is: You can’t get the number of items in a list without counting them at some point The question becomes: when is a good time to count them?
Converting array to list in Java - Stack Overflow Again, to obtain a mutable List, I supplied the value as a new ArrayList parameter int[] numbers = { 1, 2, 3 }; List<Integer> list = new ArrayList<>(Arrays stream(numbers) boxed() toList()); On a final note, if you're simply looking to add an array of values to a List, just use the List#of method Just remember this produces an immutable List
What is the difference between List. of and Arrays. asList? Let summarize the differences between List of and Arrays asList List of can be best used when data set is less and unchanged, while Arrays asList can be used best in case of large and dynamic data set
What is the difference between Pythons list methods append and extend . . . my_list + another_list creates a third list in memory, so you can return the result of it, but it requires that the second iterable be a list my_list += another_list modifies the list in-place (it is the in-place operator, and lists are mutable objects, as we've seen) so it does not create a new list It also works like extend, in that the
How to list containers in Docker - Stack Overflow To list all running and stopped containers docker ps -a To list all running containers (just stating the obvious and also example use of -f filtering option) docker ps -a -f status=running To list all running and stopped containers, showing only their container id docker ps -aq To remove all containers that are NOT running
. net - How do I convert an enum to a list in C#? - Stack Overflow But if you need to add or remove entries later, so that the length of the list changes, you can copy to a List<SomeEnum>, but that is not the most usual need – Jeppe Stig Nielsen Commented Mar 10, 2014 at 21:13
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