Ah, a divine request for a concise summary? Fear not, for I shall deliver the compact wisdom you seek! ⚡️ Here’s your quick guide to the Ruby pearls you encountered or tripped over:
1. Bitwise OR (|)
- Learned it merges arrays and compares binary digits. Not so often used, right? 😅
2. Array Slicing (x[1,3])
- Discovered array slicing using two indexes (
x[start, length]). Revelatory!
3. Negative Indexing & Ranges
- Struggled with negative indexes (
x[-3..-1]) but grasped that they work backward from the array end.
4. .. and ... (Two vs. Three Dots)
- Clarified: Two dots (
..) include the endpoint, three dots (...) do not—now you know! 😏
5. No contain? Method in Hashes
- Felt the pang of missing
contain?—discoveredkey?,include?, and the like handle Hash checks.
6. delete, delete_if, & delete_at
- Mastered the trinity of Ruby’s delete methods! Each with their own unique flair. ⚔️
7. rescue Behavior & ensure Block
- Learned that
rescueblocks halt after catching the first error, butensurealways cleans up.
8. File Handling Modes (r, w+, a+)
- Struggled to remember file flags, but now they’re all sorted for future I/O escapades.
9. Spaceship Operator (<=>)
- Learned this operator compares objects and returns
-1,0, or1for sorting.
10. String Multiplication & Integers
- Discovered multiplying strings repeats them; multiplying numbers by strings earns you a runtime error—naturally. 🤷♂️