CS61A HOMEWORK 5

Therefore, even if c returns False , the function t will be called. At the beginning of each turn, organisms in occupied cells die and organisms are born into unoccupied cells according to the following rules:. Despite the doctests above, this function actually does not do the same thing as an if statement in all cases. Destructive and Nondestructive Operations. Use only a single line for the body of the function. Consider now an extension of rlist to make it mutable:

Using the mutable rlist abstraction, implement a destructive filter function:. This is guaranteed to be the largest factor of n. Therefore, even if c returns False , the function t will be called. So, we can take the max of the sum of squares of all pairs. Variations of the game treat the edges of the board in various ways: Despite the doctests above, this function actually does not do the same thing as an if statement in all cases.

Using the mutable rlist abstraction, implement a destructive filter function: In the first one, use only assignments to individual list elements do not use slicing. The max function can take an arbitrary number of arguments. 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.

CS61A Homework 05

Use only a single line for the body of the function. These are destructive operations.: Fill in the blanks in the following function definition for adding a to the absolute value of bwithout calling abs.

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At the beginning of each turn, organisms in occupied cells die and organisms are born into unoccupied cells according to the following rules: As in lecture, an account will be represented as a function:.

This is guaranteed to be the largest factor of n. The answer is short, and doesn’t even need a loop.: The number n will travel up and down but eventually end at 1 at least for all numbers that have ever been tried — nobody has ever proved that the sequence will terminate.

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. If a cell was occupied in the previous turn, and two or three of its eight neighbor cells were occupied, the cell remains occupied.

In both cases, do not create any new lists no list displays, generators, applications of listetc. With a nondestructive operation, the original input values generally remain intact.

Homework 1 Solutions | CS 61A Summer

The Python class Life in the hw5. Destructive and Nondestructive Operations. So, we can take the max of the sum of squares of all pairs. The answer has nothing to do with global: While you’re at it, make sure you understand how the parts we’ve already implemented work!

This sequence of values of n is often called a Hailstone sequence, Write a function that takes a single argument with formal parameter name nprints out the hailstone sequence starting at n homewrk, and returns the number of steps in the sequence:. Iterating from fs61a to 1, we return the first integer that evenly divides n. An operation is nondestructive if the state of the input objects is unchanged, and the operation creates entirely new objects to represent its result.

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Write two functions that reverse the contents of a list as a side effect. We will go with the surrounded-by-desert option. 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 hoomework, etc.

cs61a homework 5

Empty cells that had exactly three occupied neighbors becomes occupied. In the second, do everything in one statement with slicing. Consider now an extension of rlist to make it mutable:.

Analogously, a hailstone travels up and down in the atmosphere before eventually landing on earth.

cs61a homework 5

As in lecture, an account will be represented as a function: Fill in the advance operation to make it work. Other occupied cells become empty because of loneliness or overcrowding. These are destructive operations