Why doesn’t Ruby have a real StringBuffer or StringIO?
I looked at the ruby documentation for StringIO, and it looks like what you want is StringIO#string, not StringIO#to_s Thus, change your code to: s = StringIO.new s << ‘foo’ s << ‘bar’ s.string
io
Why is there no IO transformer in Haskell?
Consider the specific example of IOT Maybe. How would you write a Monad instance for that? You could start with something like this: instance Monad (IOT Maybe) where return x = IOT (Just (return x)) IOT Nothing >>= _ = IOT Nothing IOT (Just m) >>= k = IOT $ error “what now?” where m’ …
Git log output to XML, JSON, or YAML?
to output to a file: git log > filename.log To specify a format, like you want everything on one line git log –pretty=oneline >filename.log or you want it a format to be emailed via a program like sendmail git log –pretty=email |email-sending-script.sh to generate JSON, YAML or XML it looks like you need to do …
difference between flush and close function in case of filewriter in java
flush() just makes sure that any buffered data is written to disk (in this case – more generally, flushed through whatever IO channel you’re using). You can still write to the stream (or writer) afterwards. close() flushes the data and indicates that there isn’t any more data. It closes any file handles, sockets or whatever. …
How can I read user input in Rust?
Rust 1.x (see documentation): use std::io; use std::io::prelude::*; fn main() { let stdin = io::stdin(); for line in stdin.lock().lines() { println!(“{}”, line.unwrap()); } } Rust 0.10–0.12 (see documentation): use std::io; fn main() { for line in io::stdin().lines() { print!(“{}”, line.unwrap()); } } Rust 0.9 (see 0.9 documentation): use std::io; use std::io::buffered::BufferedReader; fn main() { let …
Scanner is skipping nextLine() after using next() or nextFoo()?
That’s because the Scanner.nextInt method does not read the newline character in your input created by hitting “Enter,” and so the call to Scanner.nextLine returns after reading that newline. You will encounter the similar behaviour when you use Scanner.nextLine after Scanner.next() or any Scanner.nextFoo method (except nextLine itself). Workaround: Either put a Scanner.nextLine call after …
Python – IOError: [Errno 13] Permission denied:
Just Close the opened file where you are going to write.
Blocking IO vs non-blocking IO; looking for good articles [closed]
Well blocking IO means that a given thread cannot do anything more until the IO is fully received (in the case of sockets this wait could be a long time). Non-blocking IO means an IO request is queued straight away and the function returns. The actual IO is then processed at some later point by …
Creating a directory in /sdcard fails
There are three things to consider here: Don’t assume that the sd card is mounted at /sdcard (May be true in the default case, but better not to hard code.). You can get the location of sdcard by querying the system: Environment.getExternalStorageDirectory(); You have to inform Android that your application needs to write to external …
Will Go block the current thread when doing I/O inside a goroutine?
Go has a scheduler that lets you write synchronous code, and does context switching on its own and uses async I/O under the hood. So if you’re running several goroutines, they might run on a single system thread, and when your code is blocking from the goroutine’s view, it’s not really blocking. It’s not magic, …