Category "tuples"

Convert sql to tuple relational calculus

I'm trying to convert an sql query into tuple relational calculus, but there is a NOT EXIST that causes me to be stuck. SQL query: SELECT num FROM a a1, b b1

How to decorate all the comparison methods inheriting from tuple

Problem Version is being expressed as string and compared at lot of places. But then "5.10" is less than "5.2" due to ASCII comparison Solution Change it to tu

Tuple Relational Calculus: taking the results of one query and adding it to another

I am looking to see how I can combine the results of one query into another expressed in TRC format. Question Retrieve the names of employees who make at least

Is it possible to index nested lists using tuples in python?

I just started with python and very soon wondered if indexing a nested list with a tuple was possible. Something like: elements[(1,1)] One example where I want

Casting Any to Tuple2

I have a Scala function which passes message of type 'Any'. In most cases it will be a tuple of size 2. The function that receives this message needs to see the

How to use c# tuple value types in a switch statement

I'm using the new tuple value types in .net 4.7. In this example I am trying to make a switch statement for one or more cases of a tuple: using System; namespa

How to sort a list with two keys but one in reverse order?

I was wondering what would be a Pythonic way of sorting a list of tuples by two keys whereby sorting with one (and only one) key would be in a reverse order and

Creating a Python function that will create a dictionary for tuples of character counts, assigned to a key of either vowels, consonants or others

So, trying to create a function that takes a string input, and with that input, it counts all the instances of all characters to a dictionary (like {'a':5, 'b':

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