Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
526 views
in Technique[技术] by (71.8m points)

int - Checking if a double value is an integer - Swift

I need to check if a double-defined variable is convertible to Int without losing its value. This doesn't work because they are of different types:

if self.value == Int(self.value)

where self.value is a double.

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Answer

0 votes
by (71.8m points)

Try 'flooring' the double value then checking if it is unchanged:

let dbl = 2.0
let isInteger = floor(dbl) == dbl // true

Fails if it is not an integer

let dbl = 2.4
let isInteger = floor(dbl) == dbl // false

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...