A lap 2018. február 28., 18:27-kori változata

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Exercises

Mean nearest

Write a function that finds an element in a list which is the nearest to the mean of the list. There should be one parameter, the list.

Increasing sublists

Write a function that finds increasing sublists with a given length within a given list. The function should have two parameters:

• a list l
• and a natural number n
• return the list of n-long increasing sublists of l

Break down to subtasks:

• first return the list of all n-long sublists of l
• Check whether a sublist is increasing

Name conflict

We are throwing a party and there are a lots of unknown people there. We write their names in a list. Write a python function that decides whether there is a duplicate in the names (two person with the same name).

The function should have one parameter: the list of names.

Return True if there are at least two people with the same name, </tt>False</tt> is all the names are unique.

Hint:

Mind that do not compare ones name to itself, only to other's names.

Pronunciation

In Hungarian there are a lots of vowels and some words are hard to pronounce if there are a lots of consonants in them. For example "elorozza" has a good number of vowels, but the Slovakian "zmrzlina" has too many consonants.

Write a python function that decides whether a word has too many consonants or not.

• Call the function pronunciation
• with one parameter: word, the word in question
• return the string "Hard" if the number of consonants are more (or equal) than twice the number of vowels.
• return "Easy" otherwise.

Food courses

Suppose you have a really strict diet and you have a given number of calories what you should eat for dinner. You walk in a restaurant and they have the menu of soups and main dishes. Every item on the menu has a calorie value.

Can you choose the right dishes to exactly match your calorie intake?

Write a python function

• called dishes
• that have three parameters:
  • calorie, the number of calories you should eat
  • soups, a list containing calorie values for the soups
  • mains, a list containing calorie values for the main dishes
• You should return True if there is a two-course meal that fits your diet (True otherwise).

Pascal

The Pascal triangle consist of binomial coefficients, find details on Wikipedia.

Write a function that calculates some lines of the triangle and returns it as a list of lists. First list is [1], second is of length 2, and so on.

The function should have one parameter: n, the number of rows to calculate.

For example the result of pascal(4) should be:

   [[1],
   [1, 1],
   [1, 2, 1],
   [1, 3, 3, 1]]

Use the fact that a coefficient is the sum of the two elements above it.

Replacement

Write a function with two parameters: word is a string, and replaces a list of pairs where every pair is a number-character pair, like: (n, c). You should replace the characters in word according to the replaces. On pair represents that you should replace the n^th character to the new letter c.

Return the new word after you performed the replacements.

For example replace [(0, 'm'), (2, 'm'), (2, 'm')] in "puppy" you get mummy.

Name generator

You write a computer game where you have to choose name of your player. The name consists of a forst name and a last name where both first and last name come from a given list of possibilities.

Generate all the possible names composed from the list of first names and list of last names.

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