[Solved] What will be the result of this code?let people = ["Anna", "Bob", "Charlie", "David"] let predicate = NSPredicate(format:... [String]What does filtered contain? | iOS Swift

iOS Swift - Local Data Persistence

What will be the result of this code?

let people = ["Anna", "Bob", "Charlie", "David"]
let predicate = NSPredicate(format: "SELF BEGINSWITH[c] 'b'")
let filtered = (people as NSArray).filtered(using: predicate) as! [String]

What does filtered contain?

A["Bob", "bob"]

B["Bob"]

C["bob"]

D[]

Step-by-Step Solution

Solution:

Step 1: Understand predicate condition
"SELF BEGINSWITH[c] 'b'" means case-insensitive match for strings starting with 'b'.
Step 2: Filter array with predicate
Only "Bob" matches; "bob" is not in the array.
Final Answer:
["Bob"] -> Option B
Quick Check:
BEGINSWITH[c] filters case-insensitive [OK]

Quick Trick: Use [c] for case-insensitive predicate matching [OK]

Common Mistakes:

Assuming case-sensitive match
Expecting lowercase 'bob' in result
Not casting NSArray back to [String]

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What will be the result of this code?

Step 1: Understand predicate condition

Step 2: Filter array with predicate

Final Answer:

Quick Check:

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