readLine

readLine(handle)

Read a line from the given file. The return line doesn't include the line delimiter. If the file reaches the end, the function will return a null object which can be tested by the isVoid function.

handle is the handle of the file to read.

The returned line does not include the line delimiter. If the end of the file is reached, the function returns a NULL object, which can be tested with isVoid.

x=`IBM`MSFT`GOOG`YHOO`ORCL;
eachRight(writeLine, file("test.txt","w"), x);
// output: [1,1,1,1,1]

 fin = file("test.txt")
 do{
 x=fin.readLine()
 if(x.isVoid()) break
 print x
 }while(true);

/* output:
IBM
MSFT
GOOG
YHOO
ORCL
*/

Related function: writeLine