What is the difference between Array#select, Array#reject, and Array#partition?

intermediate Pro

The full answer covers the core mechanics, when this pattern wins, and the trade-offs interviewers most often probe. It includes a runnable code snippet. Read it once at your own pace, then try to recall the structure from memory before the interview.

Full answer + code samples + AI explanations

Unlock to read the complete answer for this premium question.

Browse free Ruby questions → Unlock all · $10/mo

Want a quick review of the fundamentals? See the Ruby cheatsheet.

← Back to all Ruby questions

Pro · $10/mo

73 of 85 Ruby answers are gated.

Full answers, code samples, AI explanations - simpler, deeper, or as an interactive diagram. Cancel anytime.

Full answers + code
AI explain - simpler, deeper, or visualized
1,000 AI credits / month
Cancel anytime

Get Pro → See plans & pricing →