Ruby - Arrays
Given an array of strings
words = ["pear", "apple", "banana"], how can you sort it by string length in descending order?Given an array of strings words = ["pear", "apple", "banana"], how can you sort it by string length in descending order?
hard📝 Application Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Understand sorting by length descending
Sorting by length descending can be done by sorting with a block comparing lengths or sorting by length then reversing.Step 2: Check each option
words.sort { |a, b| b.length <=> a.length } sorts with block comparing lengths descending. words.sort_by(&:length).reverse sorts by length ascending then reverses. words.sort_by(&:length).reverse! does the same but reverses in place. All produce correct descending order.Final Answer:
All of the above -> Option AQuick Check:
Multiple ways to sort descending by length [OK]
Quick Trick: Use sort with block or sort_by + reverse for custom sorting [OK]
Common Mistakes:
MISTAKES- Forgetting to reverse after sort_by
- Using sort without block for length
- Confusing reverse and reverse!
Master "Arrays" in Ruby
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