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Popular Worked Examples
New examples are added as students ask for them.
Binary Search in Python, Explained With a Worked Example
You're given a list of integers `nums`, sorted in ascending order, and a value `target`. Write a function that returns the index of `target` if it's in the list and `-1` if it isn't. Your solution has to run in O(log n) time.
A Simple REST API With Flask and SQLite
Build a small web API in Python with Flask and SQLite that stores `assignments` (title, subject, deadline). It must let a client list all assignments and add a new one, reply in JSON and use sensible HTTP status codes. Show how the same pattern extends to update and delete.
Cleaning a Messy Dataset With Pandas, Step by Step
A dataset of student submissions has duplicate rows, subject names typed in different ways, a missing score and dates in two formats. Clean it with Pandas so it's ready for analysis, then print summary statistics.
Reversing a Linked List in Python Without Extra Memory
Given the `head` node of a singly linked list, reverse the list in place and return the new head. Use O(n) time and only O(1) extra space.
COPD Care Plan Example: Airway Clearance and Gas Exchange
Mr K, 68, has smoked for 40 pack-years. He arrives in the emergency department breathless, with a productive cough bringing up thick yellow sputum, a barrel-shaped chest, SpO2 of 86% on room air and a respiratory rate of 28. Write an evidence-based nursing care plan for his first day of admission.
Type 2 Diabetes Care Plan: Blood Glucose Control and Foot Care
Mrs L, 54, has had type 2 diabetes for six years. Her HbA1c is 9.8% (84 mmol/mol), fasting glucose 210 mg/dL (11.7 mmol/L), she has reduced feeling in both feet, and she isn't sure how to count carbohydrates. Write an evidence-based care plan focused on self-management.
Evidence-Based Practice Example: Preventing Falls on a Hospital Ward
Falls are one of the most common causes of injury to patients in hospital. For an adult medical-surgical ward, write a PICOT question and outline an evidence-based plan to reduce the fall rate.
Community Health Needs Assessment: A Worked Example
An inner-city district has high rates of childhood asthma admissions and many families who struggle to afford food. Carry out a community health needs assessment and write a community nursing diagnosis.