Hi, I’m currently using swift to build a project, and have found a pretty hard to bypass roadBlock.
The main workflow of the project is - Read a csv file - Extract the values of the rows and columns - Process data extracted from file - Write some results to another file Pretty simple and straightforward. Got it working on OSX with 2016-05-09 (a) toolchain without problems, using the CSV parser from https://github.com/Daniel1of1/CSwiftV with the minimal modifications to compile with swift 3. But i need it to compile and work with linux ubuntu. I prepared a work environment with the instructions in https://www.raywenderlich.com/122189/introduction-to-open-source-swift-on-linux and it works and compiles swift code wonderfully, even installed the same snapshot of the swift toolchain to make it all happy. The problem i found is some of the string functionality i need for the csv parser to work, is not working ok in linux. - String.replacingOccurences(of: stringToFind, with: stringToPutInstead) does not work the same in both environments. i have a csv file obtainable from https://archive.ics.uci.edu/ml/datasets/default+of+credit+card+clients That contains the pattern “\r\n” and i need it to be replaced with “\n” to later on process the rest of the file. the code i use is: #if os(Linux) print("Let's change those carriage returns...") processedString = string.replacingOccurrences(of: "\r\n", with: "\n") #else processedString = string.replacingOccurrences(of: "\r\n", with: "\n") #endif And it compiles flawlessly in linux, but when it’s time to execute, it throws an error message like: Let's change those carriage returns... Illegal instruction (core dumped) I tried escaping the pattern ( “\\r\\n”) and it does not throw the error, but neither replaces the code When i tried executing the same code in the Linux virtual machine in the REPL environment, the sequence of events was: 1> import Foundation 2> let path = "/vagrant/credit_card.csv" path: String = "/vagrant/credit_card.csv" 3> let text = NSString(contentsOfFile: path as String, encoding: NSUTF8StringEncoding) text: Foundation.NSString = { Foundation.NSObject = {} _cfinfo = { info = 1920 pad = 0 } _storage = "ID,LIMIT_BAL,SEX,EDUCATION,MARRIAGE,AGE,PAY_0,PAY_2,PAY_3,PAY_4,PAY_5,PAY_6,BILL_AMT1,BILL_AMT2,BILL_AMT3,BILL_AMT4,BILL_AMT5,BILL_AMT6,PAY_AMT1,PAY_AMT2,PAY_AMT3,PAY_AMT4,PAY_AMT5,PAY_AMT6,default payment next month\r\n1,20000,2,2,1,24,2,2,-1,-1,-2,-2,3913,3102,689,0,0,0,0,689,0,0,0,0,1\r\n2,120000,2,2,2,26,-1,2,0,0,0,2,2682,1725,2682,3272,3455,3261,0,1000,1000,1000,0,2000,1\r\n3,90000,2,2,2,34,0,0,0,0,0,0,29239,14027,13559,14331,14948,15549,1518,1500,1000,1000,1000,5000,0\r\n4,50000,2,2,1,37,0,0,0,0,0,0,46990,48233,49291,28314,28959,29547,2000,2019,1200,1100,1069,1000,0\r\n5,50000,1,2,1,57,-1,0,-1,0,0,0,8617,5670,35835,20940,19146,19131,2000,36681,10000,9000,689,679,0\r\n6,50000,1,1,2,37,0,0,0,0,0,0,64400,57069,57608,19394,19619,20024,2500,1815,657,1000,1000,800,0\r\n7,500000,1,1,2,29,0,0,0,0,0,0,367965,412023,445007,542653,483003,473944,55000,40000,38000,20239,13750,13770,0\r\n8,100000,2,2,2,23,0,-1,-1,0,0,-1,11876,380,601,221,-159,567,380,601,0,581,1687,1542,0\r\n9,140000,2,3,1,28,0,0,2,0,0,0,11285,14096,12108,12211,11793,"... } 4> var tmp = text.replacingOccurrences(of: "\r\n", with: "\n") tmp: String = { _core = { _baseAddress = <extracting data from value failed> _countAndFlags = <extracting data from value failed> _owner = <extracting data from value failed> } } Execution interrupted. Enter code to recover and continue. Enter LLDB commands to investigate (type :help for assistance.) And i found myself without more options to know what’s happening. Is it a bug i need to report? is there something i’m missing? What would really be a blessing, is something akin to the xcode swift documentation that covered the linux equivalence of commands. I know is a young project yet, but it really needs to improve the docs for Linux development to be viable. ( and a GUI like Xcode too ;) ) If anyone knows anything that can help, i’d be gratefull. Carlos Barrera shadowcha...@gmail.com
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