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2. guarded equations safeTailGuard sageTailGuard :: [a] -> [a] 1 | isEmpty 1 = [] | otherwise = tail l

2. guarded equations safeTailGuard sageTailGuard :: [a] -> [a] 1 | isEmpty 1 = [] | otherwise = tail l

Database System Concepts
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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Please can someone explain each line alongside each symbol of the expression Please please give a detailed explanation for guarded equations explicitly I will upvote it
(Adapted and expanded from the book "Programming in Haskell) Define a function safetail:: [a] -> [a] that behaves like tail except that it maps [] to [] (instead of throwing an error). Using tail and isEmpty :: [a] -> Bool, define safetail using 2. guarded equations safeTailGuard :: [a] -> [a] sageTailGuard 1 | isEmpty 1 = [] | otherwise = tail l
Transcribed Image Text:(Adapted and expanded from the book "Programming in Haskell) Define a function safetail:: [a] -> [a] that behaves like tail except that it maps [] to [] (instead of throwing an error). Using tail and isEmpty :: [a] -> Bool, define safetail using 2. guarded equations safeTailGuard :: [a] -> [a] sageTailGuard 1 | isEmpty 1 = [] | otherwise = tail l
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