Answered: In [ ]: Problem 1 Write a function…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Problem 1
Write a function
count 123 : int list -> int * int * int
that takes in an int list 1 and returns a 3-tuple of integers counting the number of 1's, 2's and 3's respectively in 1. For example, count123 [3; 4;2;1;3]
= (1,1,2), and
count123 [4; 4; 1; 2; 1]
(2,1,0).
In [] let count 123 1 =
(* YOUR CODE HERE *)
In [ ]: assert (count123 [3; 4; 2; 1;3]
=
=
(1,1,2))

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Follow-up Question

Could you implement this in OCAML:

Here's the question again:

Write a function: count123:intlist->int*int*int

that takes in an int list l and returns a 3-tuple of integers counting the number of 1's, 2's and 3's respectively in l. For example, count123 [3;4;2;1;3] = (1,1,2), and count123 [4;4;1;2;1] = (2,1,0).

In [ ]:

letcount123l=(* YOUR CODE HERE *)

In [ ]:

assert (count123 [3;4;2;1;3] = (1,1,2)).

The code in Python is in the attached image, which needs to be implemented in OCAML.

Thanks!

count123.py > ...
1 def count123(1st):
NP
2
3
4
5
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11
SE
one_count = 0
two_count = 0
three_count
for i in 1st:
if i == 1:
elif i
= 0
one_count += 1
2:
two_count += 1
elif i
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print(count123([3,4,2,1,3]))
18
19 print(count123([4,4,1,2,1]))
20
3:
three_count += 1
return (one_count, two_count, three_count)
86 A 90 Live Share
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Ln 20, Col 1 Spaces: 4 UTF-8 CRLF {Python
3.10.4 64-bit
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Go Live Q

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