unique-values

I have two variables: unique_val = [1,2,3] nested_list = [['name1',1],['name2',1],['name3',3],['name4',2],['name5',2],['name6',3]] Basically I want separate lists of the names at each unique value. I struggled to put together a set of nested for loops to no avail. Ideally the output would be something like this: list_1 = ['name1','name2'] list_2 = ['name4','name5'] list_3 = ['name3',name6'] Creating variables for each item in unique_val is not a good idea. Instead of hard coding everything better use a dict with keys like list_1 as it'll handle any number number of variables. >>> from

I have this form of a spreadsheet: A B C D abc abc abc 1 def ghi jkl 1 mno pqr stu 3 vwx yza bcd 4 mno pqr stu 5 mno pqr stu 5 vwx yza bcd 5 mno pqr stu 1 Where the first 3 columns are just data of type string. The column D has integers which has numbers repeating. My question is how to output a fifth column like so: A B C D E abc abc abc 1 1 def ghi jkl 1 3 mno pqr stu 3 4 vwx yza bcd 4 5 mno pqr stu 5 mno pqr stu 5 vwx yza bcd 5 mno pqr stu 1 It only outputs the unique numbers from column D. I imagined running an if/else statement in a for or while loop that checks each cell in "D" and

I have some data in excel, I want to select unique values based on multiple criteria. The data that I have in excel is Name Medals Year A 2 2017 B 3 2018 C 5 2018 A 1 2016 C 4 2017 B 7 2018 A 1 2017 D 4 2016 I want to get the count of unique names who got medals >2 and <6 and year is 2017 or 2018. So the result that I should get is 2 as B and C satisfy the criteria. I have searched in internet about his and I got some formula using SUMPRODUCT and COUNTIFS, the formula used is =SUMPRODUCT(1/COUNTIFS(A2:A9,A2:A9,B2:B9,">2",B2:B9,"<6",C2:C9,">2016",C2:C9,"<2019" )) But I am getting error in this

What is the most efficient way to store a list of strings ignoring any duplicates? I was thinking a dictionary may be best inserting strings by writing dict[str] = false; and enumerating through the keys as a list. Is that a good solution? If you are using .NET 3.5, the HashSet should work for you. The HashSet<(Of <(T>)>) class provides high performance set operations. A set is a collection that contains no duplicate elements, and whose elements are in no particular order. Perpetualcoder You can look to do something like this var hash = new HashSet<string>(); var collectionWithDup = new []{

I have done a lot of looking around on the overflow, and on google, but none of the results works for my specific case. I have a placeholder array called $holder, values as follows: Array ( [0] => Array ( [id] => 1 [pid] => 121 [uuid] => 1 ) [1] => Array ( [id] => 2 [pid] => 13 [uuid] => 1 ) [2] => Array ( [id] => 5 [pid] => 121 [uuid] => 1 ) ) I am trying to pull out distinct/unique values from this multidimensional array. The end result I would like is either a variable containing (13,121), or (preferrably) an array as follows: Array( [0] => 13 [1] => 121 ) Again I've tried serializing and