[82% Off] The Coding Challenge Playbook: Using Loops And Dictionaries
Practical Swift Challenges with Dictionary Methods
What you’ll learn
- Apply the dictionary initialization method to count occurrences and track data patterns in arrays and strings.
- Use for loops with continue statements to control flow and skip unnecessary iterations in coding challenges.
- Recognize when to apply dictionary-based solutions to problems involving frequency
- grouping
- and validation.
- Solve real-world Swift challenges by combining loop logic with conditionals and dictionary state tracking.
- Break complex problems into repeatable logic patterns using structured iteration and conditional branching.
- Create frequency maps
- reverse lookup dictionaries
- and grouped collections using foundational Swift syntax.
- Debug and test dictionary-driven logic with predictable control flow using repeatable code patterns.
- Differentiate between problems that require counting
- filtering
- or grouping — and apply the correct structure.
- Write clean
- reusable Swift functions that apply dictionary and loop logic to a wide range of algorithmic tasks.
- Build confidence in solving interview-style problems through disciplined practice with structured logic patterns.
Requirements
- Basic understanding of Swift syntax and data types (e.g.
- Int
- String
- Array
- Dictionary).
- Familiarity with using for-in loops in Swift.
- Ability to write simple functions using func in Swift.
- Basic comfort with if/else conditional logic.
- Experience running and testing Swift code in Xcode
- Playgrounds
- or an online Swift environment.
- Understanding of zero-based indexing and how to access array elements.
- Knowledge of Swift optionals and how to unwrap values using if let (helpful but not strictly required).
- Comfort reading and modifying small code snippets.
- Interest in solving algorithmic or logic-based coding problems.
- No prior experience with advanced algorithms or data structures is required — this course focuses on mastering patterns
- not complexity.
Description
This course is designed for iOS developers who want to sharpen their core programming logic through a targeted, pattern-driven approach to solving coding challenges. Rather than jumping between unrelated problems, this course focuses on mastering two powerful Swift tools: the for-each loop with continue control flow and the dictionary initialization method.
Through a carefully curated series of challenge problems, students will learn to identify situations where these patterns apply, and build the discipline of solving problems through a consistent system of repeatable steps. By doing so, they will develop a reusable mental framework for handling common categories of algorithmic problems—such as frequency counting, grouping, filtering, and structural comparison.
This course emphasizes clarity, repetition, and intentional constraint: instead of covering every possible Swift feature, it focuses on building strength in just two patterns that appear over and over again in real-world logic and technical interviews.
Students will complete challenges like:
-
Counting duplicates in arrays
-
Grouping items by character or number
-
Detecting when a string or array meets specific frequency-based conditions
-
Building logic flows that skip, accumulate, and selectively build dictionaries through iteration
Whether you’re preparing for coding interviews, building problem-solving confidence, or reinforcing your command of Swift fundamentals, this course gives you a structured, repeatable system for beating coding challenges with discipline and precision.
