[module]
name = "sort"
description = "Sort lines of text files"
version = 1
[intro]
text = """
## What is sort?
`sort` sorts lines of text files. By default it sorts lexicographically (alphabetically). Use flags to sort numerically, reverse, or by specific fields.
## Basic Syntax
```
sort [OPTIONS] [file]
```
## Common Options
- `-n` — sort numerically
- `-r` — reverse order
- `-k N` — sort by field N (default field separator: whitespace)
- `-t CHAR` — use CHAR as field separator
- `-u` — unique (remove duplicate lines)
- `-s` — stable sort (preserve original order for equal keys)
## Examples
`sort file.txt` — alphabetical sort
`sort -n numbers.txt` — numeric sort
`sort -rn numbers.txt` — reverse numeric
`sort -k2 data.txt` — sort by second field
`sort -t, -k2 data.csv` — sort CSV by second column
"""
[[examples]]
title = "Alphabetical sort"
description = "Sort words alphabetically"
command = "sort words.txt"
output = "apple\nbanana\ncherry\n"
[[examples]]
title = "Numeric sort"
description = "Sort numbers correctly (not lexicographically)"
command = "sort -n numbers.txt"
output = "1\n5\n10\n20\n100\n"
[[exercises]]
id = "sort.1"
difficulty = "beginner"
question = """The file `words.txt` has words in random order.
Sort them alphabetically."""
expected_output = "apple\nbanana\ncherry\ndate\nelderberry\n"
hints = [
"sort with no flags does alphabetical sort",
"Try: sort words.txt",
]
solution = "sort words.txt"
match_mode = "exact"
[[exercises.fixtures]]
filename = "words.txt"
content = "cherry\napple\ndate\nbanana\nelderberry\n"
[[exercises]]
id = "sort.2"
difficulty = "beginner"
question = """The file `numbers.txt` has integers.
Sort them numerically (not lexicographically)."""
expected_output = "1\n5\n10\n20\n100\n"
hints = [
"Use -n for numeric sort",
"Try: sort -n numbers.txt",
]
solution = "sort -n numbers.txt"
match_mode = "exact"
[[exercises.fixtures]]
filename = "numbers.txt"
content = "20\n100\n1\n10\n5\n"
[[exercises]]
id = "sort.3"
difficulty = "beginner"
question = """The file `words.txt` has words with duplicates.
Sort alphabetically and remove duplicates."""
expected_output = "apple\nbanana\ncherry\n"
hints = [
"Use -u flag to remove duplicates",
"Try: sort -u words.txt",
]
solution = "sort -u words.txt"
match_mode = "exact"
[[exercises.fixtures]]
filename = "words.txt"
content = "banana\napple\ncherry\napple\nbanana\n"
[[exercises]]
id = "sort.4"
difficulty = "intermediate"
question = """The file `numbers.txt` has integers.
Sort them in reverse numeric order (largest first)."""
expected_output = "100\n20\n10\n5\n1\n"
hints = [
"Use -rn for reverse numeric sort",
"Try: sort -rn numbers.txt",
]
solution = "sort -rn numbers.txt"
match_mode = "exact"
[[exercises.fixtures]]
filename = "numbers.txt"
content = "20\n100\n1\n10\n5\n"
[[exercises]]
id = "sort.5"
difficulty = "intermediate"
question = """The file `data.txt` has name and score pairs separated by spaces.
Sort by the score (second field) numerically."""
expected_output = "Diana 61\nBob 72\nCharlie 87\nAlice 95\n"
hints = [
"Use -k2 to sort by second field, -n for numeric",
"Try: sort -k2 -n data.txt",
]
solution = "sort -k2 -n data.txt"
match_mode = "exact"
[[exercises.fixtures]]
filename = "data.txt"
content = "Alice 95\nBob 72\nCharlie 87\nDiana 61\n"
[[exercises]]
id = "sort.6"
difficulty = "advanced"
question = """The file `data.csv` is comma-separated with name and age.
Sort by age (second field) numerically, using comma as field separator."""
expected_output = "Bob,25\nAlice,30\nCharlie,35\n"
hints = [
"Use -t, to set comma as separator, then -k2 -n",
"Try: sort -t, -k2 -n data.csv",
]
solution = "sort -t, -k2 -n data.csv"
match_mode = "exact"
[[exercises.fixtures]]
filename = "data.csv"
content = "Alice,30\nBob,25\nCharlie,35\n"