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- sql - How do I list all the columns in a table? - Stack Overflow
In a query editor, if you highlight the text of table name (ex dbo MyTable) and hit ALT+F1, you'll get a list of column names, type, length, etc ALT+F1 while you've highlighted dbo MyTable is the equivalent of running EXEC sp_help 'dbo MyTable' according to this site
- Meaning of list[-1] in Python - Stack Overflow
All your return c most_common()[-1] statement does is call c most_common and return the last value in the resulting list, which would give you the least common item in that list Essentially, this line is equivalent to:
- Beginner Python: AttributeError: list object has no attribute
AttributeError: 'list' object has no attribute 'cost' this will occur when you try to call cost on a list object Pretty straightforward, but we can figure out what happened by looking at where you call cost-- in this line: profit = bike cost * margin This indicates that at least one bike (that is, a member of bikes values() is a 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
- slice - How slicing in Python works - Stack Overflow
The first way works for a list or a string; the second way only works for a list, because slice assignment isn't allowed for strings Other than that I think the only difference is speed: it looks like it's a little faster the first way Try it yourself with timeit timeit() or preferably timeit repeat()
- How to list all installed packages and their versions in Python?
For Windows 10, I think this is what you are looking for a list of available installed Pythons This is different from a list of packages as you can see below Also, on Ubuntu 20 04, I think the command is Python3 -0 list Yes, this works similar to node version manager c:\Users\user\AppData\Local\Programs\Python>py -0 list Python 0 not found!
- What is the difference between an Array, ArrayList and a List?
Also, System Array supports multiple dimensions (i e it has a Rank property) while List and ArrayList do not (although you can create a List of Lists or an ArrayList of ArrayLists, if you want to) An ArrayList is a flexible array which contains a list of objects You can add and remove items from it and it automatically deals with allocating
- pandas dataframe index: to_list () vs tolist () - Stack Overflow
tolist() is a method of NumPy arrays that returns a list representation of the array to_list() is a method of Pandas dataframes that returns a list representation of the dataframe Although both methods return the same output, their differences lie in their origins and compatibility *to_list()* is Pandas-specific
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