Question

How to get the first index in which an element of an array satisfies a certain condition in Swift

Answer 1

let arr = ["swift", "java", "python", "rust"]
 
let index = arr.firstIndex(where: {$0 == "java"})!
 
print(index)
 
 
 
 
 
 
/*
run:
 
1
 
*/

 

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Answer 2

let arr = [1, 4, 7, 8, 10, 19]
 
let index = arr.firstIndex(where: {$0 > 5})!
 
print(index)
 
 
 
 
 
 
/*
run:
 
2
 
*/

 

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