## CS61A HOMEWORK 5

The resulting list starts with the first item of the original R, then the middle item, then the second item, then the item after the middle, etc. If R contains an odd number of items, the extra one is in the first half and goes on the end of the resulting list. Riffle shuffling combines two sequences by interleaving themalternately including one item from one sequence and one from the next. The Python class Life in the hw5. As in lecture, an account will be represented as a function:. Therefore, even if c returns False , the function t will be called. Analogously, a hailstone travels up and down in the atmosphere before eventually landing on earth.

While you’re at it, make sure you understand how the parts we’ve already implemented work! At the beginning of each turn, organisms in occupied cells die and organisms are born into unoccupied cells according to the following rules:. Returns the modified list. With a nondestructive operation, the original input values generally remain intact. Analogously, a hailstone travels up and down in the atmosphere before eventually landing on earth. Write two functions that reverse the contents of a list as a side effect.

Write a function that takes an integer n that is greater than 1 and returns the largest integer that hmoework smaller than n and evenly divides n. Mutable Rlists Rlists as presented so far are immutable.

In the first one, use only assignments to individual list elements do not use slicing. Use hlmework a single line for the body of the function.

If R contains an odd number of items, the extra one is in the first half and goes on the end of the resulting list. Destructive and Nondestructive Operations. While you’re at it, make sure you understand how the parts we’ve already implemented work! Fill in the blanks in the following function definition for adding a to the absolute value of bwithout calling abs.

Write a function that takes three positive numbers and returns the sum of the squares of the two largest numbers.

This is guaranteed to be the largest factor of n. Empty cells that had exactly three occupied neighbors becomes occupied. The resulting list starts with the first item of R, then the middle item, then the second item, then the item after the middle, etc.

With a nondestructive operation, the original input values generally remain intact.

At the beginning of each turn, organisms in occupied cells die and organisms are born into unoccupied cells according to the following rules:. An operation is destructive if it sometimes changes the state of some of the input objects, so that a client can’t count on the original input values remaining around except by maintaining copies.

The Python class Life in the hw5.

# Homework 1 Solutions | CS 61A Summer

We choose the operator add or sub based on the sign of b. Using the mutable rlist abstraction, implement a destructive filter function:. An operation may be destructive for speed or simply because its abstract purpose is to make a permanent change in the state of some object.

Returns the modified list. Riffle shuffling combines two sequences by interleaving themalternately including one item from one sequence and one from the next. As in lecture, an account will be represented as a function:. In pre-Python 3 days, there was no nonlocal statement.

The answer is short, homeworm doesn’t even need a loop.: Other empty cells remain empty. Consider now an extension of rlist to make it mutable: In both cases, do not create any new lists no list displays, generators, applications of listetc.

## 61A Homework 5

Variations of the game treat the edges of the board in various ways: Using ordinary Python lists, implement a nondestructive shuffle. An operation is nondestructive if the state of the input objects is unchanged, and the operation creates entirely new objects to represent its result.

Cs611a terms “destructive” and “nondestructive” describe the effects of an operation on the states of the objects that provide input.

At the beginning of each turn, organisms in occupied cells die and organisms are born into unoccupied cells according to the following rules: The answer has nothing to do with global: Using the mutable rlist abstraction, implement a destructive filter function: The number of x’s in each row must be equal. So, we can take the max of the sum of squares of all pairs.