Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
1.1k views
in Technique[技术] by (71.8m points)

swift - Cannot invoke 'filter' with an argument list of type '((_) -> _)'

Sounds ridiculous, but I'm unable to fix this piece of code:

self.runningScripts.filter({ $0 != scriptRunner })

No matter how I write the closure I always get this error:

Cannot invoke 'filter' with an argument list of type '((_) -> _)'

runningScripts is defined like this:

var runningScripts = [ScriptRunner]()

and ScriptRunner is a Swift class (does not inherit from NSObject)

I'm using nearly the same in many other places without problems. Any suggestions?

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 Reply

0 votes
by (71.8m points)

You can get that error if you didn't make ScriptRunner conform to Equatable:

class ScriptRunner : Equatable {
    // the rest of your implementation here
}

func ==(lhs: ScriptRunner, rhs: ScriptRunner) -> Bool {
    return ... // change this to whatever test that satisfies that lhs and rhs are equal
}

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…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...