autorelease buildup in loops
A for loop that runs fine on up to 5,000 records crashes after a memory warning above that. Inside the loop you slice and concatenate strings and repeatedly convert with String(format:) and NSData. The hint is 'autorelease'. Explain the cause.
Memory and ARCMultiple choiceBasics
This code spikes memory and gets the app killed. What's the most appropriate fix? …
#autoreleasepool #peak-memory
Memory and ARCShort answerBasics
Before ARC, Objective-C code called retain, release, and autorelease directly. What did e…
#autoreleasepool
ConcurrencyShort answerIntro
In a UIKit screen you set label.text = result inside a network response callback, and som…
#runloop
ConcurrencyShort answerBasics
While the user scrolls, an on-screen countdown Timer stops, and when scrolling ends it ca…
#runloop