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Converting [string] to string

how can i append dateFormat "dMMM hh" into an array of dates let arrx = DateFormatter() arrx.dateFormat = "dMMM hh" var date = Date()while im appending in different methods getting an errors like 1.Cannot convert value of type 'Date' to expected argument type 'String' and2.Cannot convert value of type [string] to expected argument type 'String'
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by Hanumanth.
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How to convert string to integer

I have array of string, how can i convert that array of string to array of integer. For converting to int im tried 1. var intArry = arr.flatMap{Int($0)} 2. var intArry = arr.map{Int($0)}, 3. var intarry = Int(arr) and etc... but im did't get the array of Int. if im using some code im getting [0,0,0,0,0,] and some times getting empty [ ].
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by Hanumanth.
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How to communicate ESP8266 through Wifi?

Im using ESP8266 wifiModule , i want to get the list of wifi's near to me in iOS app and to connect that ESP8266 ,afterthat i have to communicate it through Wifi. is it posssible?
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by Hanumanth.
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Errors from converting old version to latest version.

we developed a programme in swift 3 but now, i am running in latest version xcode 10.2 swift in that we are getting so many erros, after that for every building time changing the errors, i mean with out changing any modifications in programme. i tried by reinstalling pods also but iam getting error 1.Could not build Objective-C module 'IMGLYColorPicker', 2. Header 'IMGLYColorPicker-Swift.h' not found
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by Hanumanth.
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