On 04/07/2012 08:58 PM, Mic wrote:
Hi,
I am getting the following errors:
$ rustc csv_create.rs <http://csv_create.rs>
csv_create.rs:17:1: 17:14 error: attempted access of field write_str
on type core::io::writer, but no public field or method with that name
was found
csv_create.rs:17 <http://csv_create.rs:17> rdr.write_str("aaa,
bbb,ccc , ddd,eee,fff,ggg,hhh,iii,jjj,kkk,lll,mmm,nnn\n");
^~~~~~~~~~~~~
csv_create.rs:17:1: 17:78 error: mismatched types: expected function
or native function but found _|_
csv_create.rs:17 <http://csv_create.rs:17> rdr.write_str("aaa,
bbb,ccc , ddd,eee,fff,ggg,hhh,iii,jjj,kkk,lll,mmm,nnn\n");
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
with the following code:
import io::reader_util;
import vec::map;
fn main(args: [str]) {
let r = io::file_writer("csv.csv" , [io::create, io::truncate]);
// r is result<reader, err_str>
if result::is_failure(r) {
fail result::get_err(r);
}
let rdr = result::get(r);
let count = 0;
while true {
if count == 4000000 { break; }
rdr.write_str("aaa, bbb,ccc ,
ddd,eee,fff,ggg,hhh,iii,jjj,kkk,lll,mmm,nnn\n");
count += 1;
}
}
What did I do wrong and would it possible to rewrite the while loop
with for loop?
I believe the problem is that you are using a writer type but have
imported a reader impl. if you add an `import io::writer_util;`
statement then it will get farther.
The most concise way to write your while loop would be using
`iter::repeat` which just executes a function a specific number of
times, like `iter::repeat(4000000) {|| ... }`. Sadly `iter::repeat`
can't be used in a for loop yet. Our iteration strategy still needs an
overhaul to be compatible with `for`.
-Brian
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