You want to save a list of names to a file, one per line, using Ruby. Which code correctly does this?

hard📝 Application Q8 of 15

Ruby - File IO

AFile.open('names.txt', 'a') { |f| f.read(['Alice', 'Bob']) }

BFile.open('names.txt', 'w') { |f| ['Alice', 'Bob'].each { |name| f.puts name } }

CFile.open('names.txt', 'r') { |f| ['Alice', 'Bob'].each { |name| f.puts name } }

DFile.open('names.txt', 'w') { |f| f.write(['Alice', 'Bob']) }

Step-by-Step Solution

Solution:

Step 1: Choose correct file mode for writing
'w' mode overwrites or creates file for writing.
Step 2: Write each name on separate line
Using each with f.puts writes each name with newline.
Final Answer:
File.open('names.txt', 'w') { |f| ['Alice', 'Bob'].each { |name| f.puts name } } -> Option B
Quick Check:
Write list line-by-line using 'w' and puts [OK]

Quick Trick: Use 'w' mode and puts inside each loop to write lines [OK]

Common Mistakes:

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