Objective-C Track Management

This page provides the Exercism community with the information and tools needed to manage the Objective-C track.

Students
2,033
Submissions
2,072
Mentoring Discussions
76

The Objective-C track needs attention ⚠️

Building

Practice Exercises

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Practice Exercises are exercises designed to allow students to solve an arbitrary problem, with the aim of them making use of the concepts they have learned so far.

Synced primary repo: 605e8b7d17e3701c385dd18e17bed4b2f1b996da (Updates should be instant)

Next goal: Implement 130 practice exercises. Find out more.
51 active practice exercises
Started
Attempts
Completions
Mentoring requests
Hello World Hello World
592
417 (avg. 0.7)
305 (51.5%)
0 (0.0%)
Bob Bob
259
311 (avg. 1.2)
202 (78.0%)
23 (8.9%)
Difference of Squares Difference of Squares
71
77 (avg. 1.1)
52 (73.2%)
6 (8.5%)
Gigasecond Gigasecond
63
67 (avg. 1.1)
49 (77.8%)
4 (6.3%)
Leap Leap
91
98 (avg. 1.1)
74 (81.3%)
6 (6.6%)
Reverse String Reverse String
50
48 (avg. 1.0)
35 (70.0%)
1 (2.0%)
Space Age Space Age
45
42 (avg. 0.9)
35 (77.8%)
1 (2.2%)
Sum of Multiples Sum of Multiples
49
54 (avg. 1.1)
36 (73.5%)
1 (2.0%)
Two Fer Two Fer
110
105 (avg. 1.0)
61 (55.5%)
27 (24.5%)
ETL ETL
37
36 (avg. 1.0)
29 (78.4%)
0 (0.0%)
Flatten Array Flatten Array
26
32 (avg. 1.2)
19 (73.1%)
0 (0.0%)
Grade School Grade School
46
46 (avg. 1.0)
34 (73.9%)
0 (0.0%)
Hamming Hamming
95
111 (avg. 1.2)
87 (91.6%)
4 (4.2%)
Isogram Isogram
22
27 (avg. 1.2)
17 (77.3%)
0 (0.0%)
Nucleotide Count Nucleotide Count
46
52 (avg. 1.1)
39 (84.8%)
3 (6.5%)
Prime Factors Prime Factors
20
16 (avg. 0.8)
12 (60.0%)
0 (0.0%)
Raindrops Raindrops
43
40 (avg. 0.9)
29 (67.4%)
3 (7.0%)
RNA Transcription RNA Transcription
13
14 (avg. 1.1)
9 (69.2%)
0 (0.0%)
Atbash Cipher Atbash Cipher
14
14 (avg. 1.0)
10 (71.4%)
0 (0.0%)
Clock Clock
16
15 (avg. 0.9)
10 (62.5%)
0 (0.0%)
Collatz Conjecture Collatz Conjecture
11
10 (avg. 0.9)
7 (63.6%)
0 (0.0%)
Grains Grains
11
11 (avg. 1.0)
8 (72.7%)
0 (0.0%)
Perfect Numbers Perfect Numbers
14
11 (avg. 0.8)
10 (71.4%)
0 (0.0%)
Phone Number Phone Number
29
30 (avg. 1.0)
26 (89.7%)
1 (3.4%)
Robot Name Robot Name
30
30 (avg. 1.0)
23 (76.7%)
0 (0.0%)
Scrabble Score Scrabble Score
16
13 (avg. 0.8)
10 (62.5%)
0 (0.0%)
Secret Handshake Secret Handshake
11
9 (avg. 0.8)
7 (63.6%)
0 (0.0%)
Series Series
11
5 (avg. 0.5)
5 (45.5%)
0 (0.0%)
Sieve Sieve
11
8 (avg. 0.7)
7 (63.6%)
0 (0.0%)
Strain Strain
11
9 (avg. 0.8)
7 (63.6%)
0 (0.0%)
Sublist Sublist
18
16 (avg. 0.9)
12 (66.7%)
0 (0.0%)
Triangle Triangle
16
10 (avg. 0.6)
9 (56.3%)
0 (0.0%)
Acronym Acronym
15
13 (avg. 0.9)
9 (60.0%)
0 (0.0%)
All Your Base All Your Base
16
11 (avg. 0.7)
11 (68.8%)
0 (0.0%)
Allergies Allergies
14
15 (avg. 1.1)
10 (71.4%)
0 (0.0%)
Anagram Anagram
42
52 (avg. 1.2)
38 (90.5%)
1 (2.4%)
Beer Song Beer Song
15
15 (avg. 1.0)
11 (73.3%)
0 (0.0%)
Binary Search Binary Search
11
12 (avg. 1.1)
6 (54.5%)
0 (0.0%)
Crypto Square Crypto Square
9
4 (avg. 0.4)
4 (44.4%)
0 (0.0%)
Largest Series Product Largest Series Product
11
9 (avg. 0.8)
7 (63.6%)
0 (0.0%)
Meetup Meetup
11
9 (avg. 0.8)
5 (45.5%)
0 (0.0%)
Nth Prime Nth Prime
11
10 (avg. 0.9)
6 (54.5%)
0 (0.0%)
Pangram Pangram
13
9 (avg. 0.7)
7 (53.8%)
0 (0.0%)
Pascal's Triangle Pascal's Triangle
10
10 (avg. 1.0)
6 (60.0%)
0 (0.0%)
Say Say
8
7 (avg. 0.9)
4 (50.0%)
0 (0.0%)
Transpose Transpose
9
8 (avg. 0.9)
5 (55.6%)
0 (0.0%)
Word Count Word Count
54
67 (avg. 1.2)
50 (92.6%)
2 (3.7%)
Matching Brackets Matching Brackets
12
12 (avg. 1.0)
7 (58.3%)
0 (0.0%)
Luhn Luhn
14
11 (avg. 0.8)
7 (50.0%)
0 (0.0%)
Roman Numerals Roman Numerals
11
7 (avg. 0.6)
7 (63.6%)
0 (0.0%)
Run-Length Encoding Run-Length Encoding
14
7 (avg. 0.5)
7 (50.0%)
0 (0.0%)
79 unimplemented practice exercises
Affine Cipher Affine Cipher
Alphametics Alphametics
Armstrong Numbers Armstrong Numbers
Bank Account Bank Account
Binary Search Tree Binary Search Tree
Book Store Book Store
Bottle Song Bottle Song
Bowling Bowling
Change Change
Circular Buffer Circular Buffer
Complex Numbers Complex Numbers
Connect Connect
Conway's Game of Life Conway's Game of Life
Custom Set Custom Set
D&D Character D&D Character
Darts Darts
Diamond Diamond
Dominoes Dominoes
DOT DSL DOT DSL
Eliud's Eggs Eliud's Eggs
Error Handling Error Handling
Food Chain Food Chain
Forth Forth
Go Counting Go Counting
Grep Grep
Hangman Hangman
High Scores High Scores
House House
ISBN Verifier ISBN Verifier
Killer Sudoku Helper Killer Sudoku Helper
Kindergarten Garden Kindergarten Garden
Knapsack Knapsack
Ledger Ledger
Lens Person Lens Person
Linked List Linked List
List Ops List Ops
Markdown Markdown
Matrix Matrix
Micro Blog Micro Blog
Minesweeper Minesweeper
OCR Numbers OCR Numbers
PaaS I/O PaaS I/O
Palindrome Products Palindrome Products
Parallel Letter Frequency Parallel Letter Frequency
Pig Latin Pig Latin
Poker Poker
POV POV
Protein Translation Protein Translation
Proverb Proverb
Pythagorean Triplet Pythagorean Triplet
Queen Attack Queen Attack
Rail Fence Cipher Rail Fence Cipher
Rational Numbers Rational Numbers
React React
Rectangles Rectangles
Resistor Color Resistor Color
Resistor Color Duo Resistor Color Duo
Resistor Color Trio Resistor Color Trio
REST API REST API
Robot Simulator Robot Simulator
Rotational Cipher Rotational Cipher
Saddle Points Saddle Points
Satellite Satellite
SGF Parsing SGF Parsing
Simple Cipher Simple Cipher
Simple Linked List Simple Linked List
Spiral Matrix Spiral Matrix
Square Root Square Root
State of Tic-Tac-Toe State of Tic-Tac-Toe
Tournament Tournament
Tree Building Tree Building
Twelve Days Twelve Days
Two Bucket Two Bucket
Variable Length Quantity Variable Length Quantity
Word Search Word Search
Wordy Wordy
Yacht Yacht
Zebra Puzzle Zebra Puzzle
Zipper Zipper

Programming Tags

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Help manage the tags used to group, filter and recommend solutions, approaches and articles.

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Test Runner

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Create Test Runners that have the single responsibility of taking a solution, running all tests and returning a standardized output.

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Representer

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Build a Representer: a bit of code that has the single responsibility of taking a solution and returning a normalized representation of it.

Next goal: Build a Representer. Find out more.

Analyzer

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Build an Analyzer for Objective-C: Exercism's analyzers automatically assess student's submissions and provide mentor-style commentary.

Next goal: Build an Analyzer. Find out more.